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Scientific Data Documentation
National Hospital Discharge Survey, 1970-1987
   DSN:	CC36.NHDS70
	CC36.NHDS71
	CC36.NHDS72
	CC36.NHDS73
	CC36.NHDS74
	CC36.NHDS75
	CC36.NHDS76
	CC36.NHDS77
	CC36.NHDS78
	CC36.NHDS79
	CC36.NHDS80
	CC36.NHDS81
	CC36.NHDS82
	CC36.NHDS83
	CC36.NHDS84
	CC36.NHDS85
	CC36.NHDS86
	CC36.NHDS87

ABSTRACT

This document and its attachments allow one to use the 1970-78, 1979-85, and 1986-87 data tapes which contain the data collected by the National Hospital Discharge Survey conducted by the National Center for Health Statistics. The National Hospital Discharge Survey provides a continuous sample of hospital discharge records, collecting medical and demographic information for calculating statistics on hospital utilization. The survey consists of data abstracted from the face sheets of the medical records for sampled inpatients discharged from a national sample of non-Federal short-stay hospitals. For a description of the survey design and data collection procedures, see other sections. For a more detailed description of the survey design, data collection procedures, and the estimation process, see Reference l.

BACKGROUND

To provide more complete and precise information on the utilization of the Nation's hospitals and on the nature and treatment of illness among the hospitalized population, the NCHS in 1962 began exploring possibilities for surveying morbidity in hospitals. A national advisory group was established. The NCHS conducted planning discussions with other elements of the Public Health Service. Hospitalization material from the Survey Research Center of the University of Michigan, the American Hospital Association, and the Professional Activities Study was examined and evaluated. In l963, a study by the School of Public Health of the University of Pittsburgh under contract to the NCHS demonstrated the feasibility of an NHDS type of program. An additional pilot study using enumerators from the Bureau of the Census was conducted in late l964 and confirmed the University of Pittsburgh's findings.

Finally, with advice and support from the American Hospital Association, the American Medical Association, individual experts, other professional groups, and elements of the U.S. Public Health Service, the NCHS initiated the National Hospital Discharge Survey in 1964.

POPULATION DESCRIPTION

The National Hospital Discharge Survey encompasses patients discharged from noninstitutional hospitals, exclusive of Federal hospitals, located in the 50 States and the District of Columbia. For purposes of the NHDS, a facility is considered a short-stay hospital only if it meets the following criteria:

 1.  At least six beds are maintained for use by inpatients.
 2.  It is licensed as a hospital in States with licensure laws.
 3.  Inpatient medical care is provided under the supervision of a licensed
     doctor of medicine or osteopathy.
 4.  Nursing service is provided 24 hours a day under supervision of a
     registered nurse.
 5.  Separate medical records are maintained for each patient admitted.
 6.  The average length of stay for all patients is less than 30 days.

METHODOLOGY

Sampling Frame and Size of Sample

The National Master Facility Inventory of Hospitals and Institutions (NMFI) constitutes the sampling frame (universe) for hospitals in the NHDS. The NCHS has published a detailed description of the NMFI, its contents, plans for maintaining it, and procedures for assessing the completeness of its coverage (see Reference 2). The universe for the survey consisted originally of 6,965 short-stay hospitals, excluding military and VA hospitals, contained in the NMFI in l963.

Some hospitals refused to participate and some were deemed out of scope, either because the hospital had gone out of business or because it failed to meet the NHDS definition of a short-stay hospital. The number of hospitals which refused to participate or were out of scope are given in Table l, along with the number of participating hospitals.

                              Number of Hospitals

 Year        Sampled        Refused    Out of Scope    Surveyed

 1970          465            46            24            395
 1971          465            60            26            379
 1972          497            45            28            424
 1973          497            42            31            424
 1974          497            38            33            426
 1975          511            44            35            432
 1976          511            53            39            419
 1977          535            68            44            423
 1978          535            74            48            413
 1979          544            65            48            431
 1980          544            72            52            420
 1981          550            71            51            428
 1982          550            71            53            426
 1983          553            78            57            418
 1984          553            86            60            407
 1985          558            82            62            414
 1986          558            75            65            418
 1987          558            92            66            400

Sample Design

 All hospitals with 1,000 beds or more in the original universe of
 short-stay hospitals were selected with certainty in the sample. All
 hospitals with fewer than 1,000 beds were stratified, the primary stratum
 being the 24 size-by-region classes shown in Table 2. Within each of these
 24 primary strata, the allocation of the hospitals was made through a
 controlled selection technique so that hospitals in the sample would be
 properly distributed with regard to type of ownership and geographic
 division.  Sample hospitals were drawn with probabilities ranging from
 certainty for the largest hospitals to l in 40 for the smallest hospitals.

 The within-hospital sampling ratio for selecting sample discharges varied
 inversely with the probability of selection of the hospital. The smallest
 sampling fraction of discharged patients was taken in the largest
 hospitals, and the largest fraction was taken in the smallest hospitals.
 This was done to compensate for the fact that hospitals were selected with
 probabilities proportionate to their size class and to assure that the
 overall probability of selecting a discharge would be approximately the
 same in each size class.


Distribution of Non-Federal Short-Stay Hospitals:  U.S., 1978

 Distribution of non-Federal short-stay hospitals in the universe and
 National Discharge Survey in-scope sample by geographic region and bed
 size of hospital:  United States, 1978


 Bed size of             All        North
 hospital                Regions    Northeast   Central   South      West

 All sizes                               Number of hospitals

 Universe.......          7,903     1,177      2,124      3,130      1,472

 Sample.........            535       132        152        170         81

 Number
 participating..            413       110        115        125         63

 6-49 beds

 Universe.......          3,486       221        889      1,658        718

 Sample.........             69         8         18         30         13

 Number
 participating..             42         6         13         16          7

 50-99 beds

 Universe.......          1,871       299        482        721        369

 Sample.........             79        14         20         31         14

 Number
 participating..             58        10         14         23         11

 100-199 beds

 Universe......           1,371       298        404        448        221

 Sample........             118        26         33         40         19

 Number
 participating..             91        22         26         27         16

 200-299 beds

 Universe.......            614       193        164        160         97

 Sample.........             96        31         27         23         15

 Number
 participating..             76        26         21         17         12

 300-499 beds

 Universe.......            408       112        134        109         53

 Sample.........             97        25         32         28         12

 Number
 participating..             82        22         26         25          9

 500-999 beds

 Universe.......            135        45         48         29         13

 Sample.........             58        19         19         13          7

 Number
 participating..             48        16         12         13          7

 1,000 beds
 or more

 Universe.......             18         9          3          5          1

 Sample.........             18         9          3          5          1

 Number
 participating..             16         8          3          4          1


Distribution of Non-Federal Short-Stay Hospitals:  U.S., 1979

 Distribution of non-Federal short-stay hospitals in the universe and
 National Hospital Discharge Survey in-scope sample by geographic region
 and bed size of hospital:  United States, 1979


 Bed size of             All       North
 hospital                Regions   Northeast   Central     South      West

 All sizes                               Number of hospitals

 Universe.......          8,017     1,784      2,148      3,196      1,489

 Sample.........            544       132        153        176         83

 Number
 participating..            431       110        116        143         62

 6-49 beds

 Universe.......          3,521       223        899      1,670        729

 Sample.........             70         8         18         30         14

 Number
 participating..             44         6         13         19          6

 50-99 beds

 Universe.......          1,897       301        486        737        373

 Sample.........             80        14         20         32         14

 Number
 participating..             61        11         14         25         11

 100-199 beds

 Universe......           1,411       298        412        479        222

 Sample........             122        26         34         43         19

 Number
 participating..             99        22         27         34         16

 200-299 beds

 Universe.......            624       195        166        165         98

 Sample.........             98        31         27         24         16

 Number
 participating..             76        26         20         18         12

 300-499 beds

 Universe.......            411       113        134        111         53

 Sample.........             98        25         32         29         12

 Number
 participating..             86        22         26         29          9

 500-999 beds

 Universe.......            135        45         48         29         13

 Sample.........             58        19         19         13          7

 Number
 participating..             48        15         13         13          7

 1,000 beds
 or more

 Universe.......             18         9          3          5          1

 Sample.........             18         9          3          5          1

 Number
 participating..             17         8          3          5          1


Distribution of Non-Federal Short-Stay Hospitals:  U.S., 1980

 Distribution of non-Federal short-stay hospitals in the universe and
 National Hospital Discharge Survey in-scope sample by geographic region
 and bed size of hospital:  United States, 1980


 Bed size of             All       North
 hospital                regions   Northeast   Central     South      West

 All sizes                               Number of hospitals

 Universe.......          8,017     1,784      2,148      3,196      1,489

 Sample.........            544       132        153        176         83
 Number
 participating..            420       108        119        131         62

 6-49 beds

 Universe.......          3,521       223        899      1,670        729

 Sample.........             70         8         18         30         14

 Number
 participating..             41         5         13         16          7

 50-99 beds

 Universe.......          1,897       301        486        737        373

 Sample.........             80        14         20         32         14

 Number
 participating..             58        10         14         24         10

 100-199 beds

 Universe......           1,411       298        412        479        222
 Sample........             122        26         34         43         19

 Number
 participating..             98        22         29         31         16

 200-299 beds

 Universe.......            624       195        166        165         98

 Sample.........             98        31         27         24         16

 Number
 participating..             76        26         21         17         12

 300-499 beds

 Universe.......            411       113        134        111         53

 Sample.........             98        25         32         29         12

 Number
 participating..             80        20         24         27          9

 500-999 beds

 Universe.......            135        45         48         29         13

 Sample.........             58        19         19         13          7

 Number
 participating..             51        17         15         12          7

 1,000 beds
 or more

 Universe.......             18         9          3          5           1

 Sample.........             18         9          3          5           1

 Number
 participating..             16         8          3          4           1


Distribution of Non-Federal Short-Stay Hospitals:  U.S., 1981

 Distribution of non-Federal short-stay hospitals in the universe and
 National Hospital Discharge Survey in-scope sample by geographic region
 and bed size of hospital:  United States, 1981


 Bed size of             All       North
 hospital                regions   Northeast   Central     South       West

 All sizes                               Number of hospitals

 Universe.......          8,080     1,185      2,156      3,236       1,503

 Sample.........            550       132        155        180          83

 Number
 participating..            428       105        124        135          64

 6-49 beds

 Universe.......          3,537       223        901      1,679         734

 Sample.........             70         8         18         30          14

 Number
 participating..             44         6         13         18           7

 50-99 beds

 Universe.......          1,918       301        487        751         379

 Sample.........             81        14         20         33          14

 Number
 participating..             61         9         15         25          12

 100-199 beds

 Universe......           1,427       298        414        491         224

 Sample........             124        26         34         45          19

 Number
 participating..             96        22         29         29          16

 200-299 beds

 Universe.......            632       196        168        169          99

 Sample.........            100        31         28         25          16

 Number
 participating..             78        25         23         18          12

 300-499 beds

 Universe.......            413       113        135        112          53

 Sample.........             99        25         33         29          12

 Number
 participating..             82        20         26         27           9

 500-999 beds

 Universe.......            135        45         48         29          13

 Sample.........             58        19         19         13           7

 Number
 participating..             51        15         16         13           7

 1,000 beds
 or more

 Universe.......             18         9          3          5           1

 Sample.........             18         9          3          5           1

 Number
 participating..             16         8          3          4           1


Distribution of Non-Federal Short-Stay Hospitals:  U.S., 1982

 Distribution of non-Federal short-stay hospitals in the universe and
 National Hospital Discharge Survey in-scope sample by geographic region
 and bed size of hospital:  United States, 1982


 Bed size of             All       North
 hospital                regions   Northeast   Central     South       West

 All sizes                               Number of hospitals

 Universe.......          8,080     1,185      2,156      3,236       1,503

 Sample.........            550       132        155        180          83

 Number
 participating..            426       104        121        138          63

 6-49 beds

 Universe.......          3,537       223        901      1,679         734

 Sample.........             70         8         18         30          14

 Number
 participating..             45         6         12         19           8

 50-99 beds

 Universe.......          1,918       301        487        751         379

 Sample.........             81        14         20         33          14

 Number
 participating..             60         9         15         26          10

 100-199 beds

 Universe......           1,427       298        414        491         224

 Sample........             124        26         34         45          19

 Number
 participating..             95        22         28         29          16

 200-299 beds

 Universe.......            632       196        168        169          99

 Sample.........            100        31         28         25          16

 Number
 participating..             78        25         22         19          12

 300-499 beds

 Universe.......            413       113        135        112          53

 Sample.........             99        25         33         29          12

 Number
 participating..             82        20         26         27           9

 500-999 beds

 Universe.......            135        45         48         29          13

 Sample.........             58        19         19         13           7

 Number
 participating..             49        14         15         13           7

 1,000 beds
 or more

 Universe.......             18         9          3           5          1

 Sample.........             18         9          3           5          1

 Number
 participating..             17         8          3           5          1


Distribution of Non-Federal Short-Stay Hospitals:  U.S., 1983

 Distribution of non-Federal short-stay hospitals in the universe and
 National Hospital Discharge Survey in-scope sample by geographic region
 and bed size of hospital:  United States, 1983


 Bed size of             All       North
 hospital                regions   Northeast   Central      South      West

 All sizes                                Number of hospitals

 Universe.......          8,130     1,188      2,168       3,266      1,508

 Sample.........            553       132        155         183         83

 Number
 participating..            418       105        118         133         62

 6-49 beds

 Universe.......          3,542       223        903       1,681        735

 Sample.........             70         8         18          30         14

 Number
 participating..             41         6         11          17          7

 50-99 beds

 Universe.......          1,939       301        490         766        382

 Sample.........             82        14         20          34         14

 Number
 participating..             60        10         15          25         10

 100-199 beds

 Universe......           1,444       299        419         501        225

 Sample........             125        26         34          46         19

 Number
 participating..             96        22         28          30         16

 200-299 beds

 Universe.......            639       198        170         172         99

 Sample.........            101        31         28          26         16

 Number
 participating..             80        26         23          19         12

 300-499 beds

 Universe.......            413       113        135         112         53

 Sample.........             99        25         33          29         12

 Number
 participating..             77        20         23          25          9

 500-999 beds

 Universe.......            135        45         48          29         13

 Sample.........             58        19         19          13          7

 Number
 participating..             47        13         15          12          7

 1,000 beds
 or more

 Universe.......             18         9          3           5          1

 Sample.........             18         9          3           5          1

 Number
 participating..             17         8          3           5          1


Distribution of Non-Federal Short-Stay Hospitals:  U.S., 1984

 Distribution of non-Federal short-stay hospitals in the universe and
 National Hospital Discharge Survey in-scope sample by geographic region
 and bed size of hospital:  United States, 1984


 Bed size of             All        North
 hospital                regions    Northeast  Central      South      West

 All sizes                                Number of hospitals

 Universe.......          6,023       902      1,704       2,291      1,126

 Sample.........            493       115        140         164         74

 6-49 beds

 Universe.......          1,372        78        415         535        344

 Sample.........             39         6         11          13          9

 50-99 beds

 Universe.......          1,467       160        427         611        269

 Sample.........             62        10         14          30          8

 100-199 beds

 Universe......           1,398       203        373         571        251
 Sample........              93        16         22          43         12

 200-299 beds

 Universe.......            733       196        177         237        123

 Sample.........             72        18         21          20         13

 300-499 beds

 Universe.......            715       176        202         224        113

 Sample.........            119        37         35          25         22

 500-999 beds

 Universe.......            309        78        101         105         25

 Sample.........             95        23         34          29          9

 1,000 beds
 or more

 Universe.......             29        11          9           8          1

 Sample.........             13         5          3           4          1


Distribution of Non-Federal Short-Stay Hospitals:  U.S., 1985

 Distribution of non-Federal short-stay hospitals in the universe and
 National Hospital Discharge Survey in-scope sample by geographic region
 and bed size of hospital:  United States, 1985


 Bed size of             All        North
 hospital                regions    Northeast  Central      South      West

 All sizes                               Number of hospitals

 Universe.......          6,007       902      1,687       2,301      1,117

 Sample.........            496       115        140         166         75

 6-49 beds

 Universe.......          1,351        73        420         527        331

 Sample.........             36         6         10          11          9

 50-99 beds

 Universe.......          1,464       163        414         623        264

 Sample.........             65        11         15          31          8

 100-199 beds

 Universe......           1,410       204        374         574        258

 Sample........              92        15         21          43         13

 200-299 beds

 Universe.......            747       199        179         247        122

 Sample.........             80        19         21          24         16

 300-499 beds

 Universe.......            706       177        196         214        119

 Sample.........            115        35         35          24         19

 500-999 beds

 Universe.......            302        77         96         107         22

 Sample.........             96        24         33          30          9

 1,000 beds
 or more

 Universe.......             27         9          8           9          1

 Sample.........             12         5          3           3          1

 In nearly all hospitals, the daily listing sheet of discharges was the
 frame from which the subsamples of discharges were selected within the
 sample hospitals.  The sample discharges were selected by a random
 technique, usually on the basis of the terminal digit(s) of the patient's
 medical record number--a number assigned when the patient was admitted to
 the hospital.  If the hospital's daily discharge listing did not show the
 medical record number, the sample was selected by starting with a randomly
 selected discharge and taking every kth discharge thereafter.


Distribution of Non-Federal Short-Stay Hospitals:  U.S., 1986

 Distribution of non-Federal short-stay hospitals in the universe
 and National Hospital Discharge Survey in-scope sample by geographic
 region and bed size of hospital:  United States, 1986


 Bed size of             All
 hospital                regions    Northeast  Midwest      South      West

 All sizes                               Number of hospitals

 Universe.......          6,007       902      1,687       2,301      1,117

 Sample.........            493       115        139         164         75

 6-49 beds

 Universe.......          1,351        73        420         527        331

 Sample.........             35         6         10          10          9

 50-99 beds

 Universe.......          1,464       163        414         623        264

 Sample.........             65        11         15          31          8

 100-199 beds

 Universe......           1,410       204        374         574        258

 Sample........              92        15         21          43         13

 200-299 beds

 Universe.......            747       199        179         247        122

 Sample.........             78        19         20          23         19

 300-499 beds

 Universe.......            706       177        196         214        119

 Sample.........            115        35         37          24         19

 500-999 beds

 Universe.......            302        77         96         107         22

 Sample.........             96        24         33          30          9

 1,000 beds
 or more

 Universe.......             27         9          8           9          1

 Sample.........             12         5          3           3          1


Distribution of Non-Federal Short-Stay Hospitals:  U.S., 1987

 Distribution of non-Federal short-stay hospitals in the universe
 and National Hospital Discharge Survey in-scope sample by geographic
 region and bed size of hospital:  UNITED STATES, 1987


 Bed size of              All
 hospital                 regions   Northeast  Midwest      South      West

 All sizes                               Number of hospitals

 Universe.......           6,007       902      1,687       2,301      1,117

 SAMPLE.........             491       115        139         163         74

 6-49 beds

 Universe.......           1,351        73        420         527        331

 SAMPLE.........              31         6          9          11          5

 50-99 beds

 Universe.......           1,464       163        414         623        264

 SAMPLE.........              66        11         14          30         11

 100-199 beds

 Universe......            1,410       204        374         574        258

 SAMPLE........               89        15         21          39         14

 200-299 beds

 Universe.......             747       199        179         247        122

 SAMPLE.........              90        20         27          26         17

 300-499 beds

 Universe.......             706       177        196         214        119

 SAMPLE.........             118        37         38          26         17

 500-999 beds

 Universe.......             302        77         96         107         22

 SAMPLE.........              87        21         29          28          9

 1,000 beds
 or more

 Universe.......              27         9          8           9          1

 SAMPLE.........              10         5          2           2          1

 
In nearly all hospitals, the daily listing sheet of discharges was the
 frame from which the subsamples of discharges were selected within the
 sample hospitals.  The sample discharges were selected by a random
 technique, usually on the basis of the terminal digit(s) of the patient's
 medical record number--a number assigned when the patient was admitted to
 the hospital.  If the hospital's daily discharge listing did not show the
 medical record number, the sample was selected by starting with a randomly
 selected discharge and taking every kth discharge thereafter.


Data Collection

Data Collection (1970-1985)
 Depending on the study procedure agreed on with the hospital
 administrator, either hospital staff or representatives of the NCHS
 performed the sample selection and the transcription of information from
 the hospital records to abstract forms. In about two-thirds of the
 hospitals that participate in the NHDS, the medical records department of
 the hospital performed this work. In the remaining hospitals, personnel of
 the U.S. Bureau of the Census acting for the NCHS performed the work.

 Survey hospitals used an abstract form to transcribe data from the
 hospital records. The abstract form provides for recording demographic
 data, admission and discharge dates, discharge status, and information on
 discharge diagnoses and surgical operation discharge diagnoses were listed
 on the abstract form in the order of principal diagnosis, or first-
 listed diagnosis if the principal diagnosis was not identified, followed
 by the order in which all other diagnoses were entered on the face sheet
 of the medical record.  All operations were listed in the order in which
 they were recorded on the face sheet.

 Shipments of completed abstract forms for each sample hospital were
 transmitted, along with sample selection control sheets, to a Census ,
 Regional Office. Every shipment of abstracts was reviewed and each
 abstract form was checked for completeness. Abstracts were then sent to
 the NCHS for processing.

Data Collection (1986-1987)
 There were two data collection procedures used for the survey.  The first
 was the traditional manual system of sample selection and data abstraction.
 The second was an automated method, used in approximately 17 percent of the
 sample hospitals, that involved the purchase of data tapes from commercial
 abstracting services.

 In the manual system, depending on the study procedure agreed on with the
 hospital administrator, the sample selection and the transcription of
 information from the hospital records to abstract forms were performed by
 either the hospital staff or by representatives of the National Center for
 Health Statistics (NCHS) or by both.  About 50 percent of the hospitals
 that participated in the manual NHDS system had the work performed by the
 medical records department of the hospital. In the remaining hospitals
 using this system, the work was performed by the medical records
 department of the hospital.  In the remaining hospitals using this system,
 the work was performed by personnel of the U.S. Bureau of the Census
 acting for NCHS. The completed forms were forwarded to NCHS for coding,
 editing, and weighting procedures.

 For hospitals using the automated system, tapes containing machine
 readable medical record data were purchased from commercial abstracting
 services. Upon receipt of these tapes they were subject to NCHS sampling,
 editing, and weighting procedures.  A detailed description of the
 automated process will be published.

 The Medical Abstract Form and the abstract service data tapes contain
 items relating to the personal characteristics of the patient, including
 birth data, sex, race, and marital status, but not name and address;
 administrative information, including admission and discharge dates,
 discharge status, and medical record number; and medical information,
 including diagnoses and surgical and nonsurgical operations or procedures.


Medical Coding and Edit

Medical Coding and Edit (1970-1978)
 The medical information recorded on the sample patient abstracts was coded
 centrally by the NCHS staff. A maximum of five diagnostic codes was
 assigned for each sample abstract; in addition, if the medical information
 included surgery, a maximum of three codes for surgical operations and
 procedures was assigned.  Following the conversion of the data on the
 medical abstract to computer tape, a final medical edit was accomplished
 by computer inspection runs and a shed review of rejected abstracts.  If
 sex or age of patient was incompatible with the recorded medical
 information, priority was given to the medical information in the editing
 decision.

 The basic system for coding the diagnoses on NHDS sample patient abstracts
 is the ICDA-8 (see Reference 3). The ICDA-8 section for Surgical
 Operations, Diagnostic and Other Therapeutic Procedures is the coding
 system used for surgical procedures and operations.  Modifications to the
 ICDA-8 have been made for the NHDS because of incomplete or ill-defined
 terminology on the abstracts or to provide additional detail.  These
 modifications are detailed in Appendix C.  The symbols Y, A, and R as
 found in ICDA-8 are replaced on the tape by the sympols & (ampersand), *
 (asterisk), and - (dash), respectively.

Medical Coding and Edit (1979-1985)
 The medical information recorded on the sample patient abstracts was coded
 centrally by the NCHS staff. A maximum of seven diagnostic codes was
 assigned for each sample abstract; in addition, if the medical information
 included surgery, a maximum of four codes for surgical operations and
 procedures was assigned. Following the conversion of the data on the
 medical abstract to computer tape, a final medical edit was accomplished
 by computer inspection runs and a   shed review of rejected abstracts. If
 sex or age of patient was incompatible with the recorded medical
 information, priority was given to the medical information in the editing
 decision.

 (The next paragraph was added in 1984)
 NHDS medical coders code from abstracts of medical records in the order
 the diagnoses and procedures are entered.  For most abstracts, this coding
 procedure is relatively free of problems.  It was noted, however, that
 acute myocardial infarction frequently was not the lead entry in a group
 of circulatory diagnoses.  For example, the patient's record may have
 arteriosclerosis listed first and arteriosclerotic heart disease listed
 second with acute myocardial infarction listed third.  A decision was made
 to reorder some acute myocardial infarction diagnoses.  The new procedure,
 based on accepted medical coding practice, states that whenever an acute
 myocardial infarction in encountered with other circulatory diagnoses and
 is other than the first entry, it should be reordered to the first
 position.

 The basic system for coding the diagnoses on the NHDS sample patient
 abstracts is the International Classification of Diseases, 9th Revision,
 Clinical Modification (ICD-9-CM) (see Reference 3).  The ICD-9-CM section
 for Surgical Operations, Diagnostic and Other Therapeutic Procedures is
 the coding system used for surgical procedures and operations.

 The Uniform Hospital Discharge Data Set (UHDDS) classifies ICD-9-CM
 procedures into four classes.  Classes 1-3 consist of "significant
 procedures" - that is, procedures which carry an operative or anesthetic
 risk or require highly trained personnel, special facilities, or special
 equipment.  Class 4 procedures are not considered significant; therefore,
 reporting them is considered optional.  The Class 4 procedures not coded
 by the NHDS are listed in Appendix C.

Medical Coding and Edit (1986-1987)
 For hospitals in the manual system the medical information recorded on the
 sample patient abstracts was coded centrally by the NCHS staff.  A maximum
 of seven diagnostic codes was assigned for each sample abstract; in
 addition, if the medical information included surgery, a maximum of four
 codes for surgical operations and procedures was assigned. Following the
 conversion of the data on the medical abstract to computer tape, a final
 medical edit was accomplished by computer inspection runs and a review of
 rejected abstracts. If sex or age of patient was incompatible with the
 recorded medical information, priority was give to the medical information
 in the editing decision.

 NHDS medical coders code from abstracts of medical records in the order

 the diagnoses and procedures are entered.  For most abstracts, this coding
 procedure is relatively free of problems.  It was noted, however, that
 acute myocardial infarction frequently was not the lead entry in a group
 of circulatory diagnoses.  For example, the patient's record may have
 arteriosclerosis listed first and arteriosclerotic heart disease listed
 second with acute myocardial infarction listed third.  A decision was made
 to reorder some acute myocardial infarction diagnoses.  The new procedure,
 based on accepted medical coding practice, states that whenever an acute
 myocardial infarction in encountered with other circulatory diagnoses and
 is other than the first entry, it should be reordered to the first
 position.

 Additionally, if a women delivers a child during the hospital episode,
 code V27 is the first-listed diagnosis.

 The basic system for coding the diagnoses on the NHDS sample patient
 abstracts is the International Classification of Diseases, 9th Revision,
 Clinical Modification (ICD-9-CM) (see Reference 3).  The ICD-9-CM section
 for Surgical Operations, Diagnostic and Other Therapeutic Procedures is
 the coding system used for surgical procedures and operations.

 The Uniform Hospital Discharge Data Set (UHDDS) classifies ICD-9-CM
 procedures into four classes.  Classes 1-3 consist of "significant
 procedures" - that is, procedures which carry an operative or anesthetic
 risk or require highly trained personnel, special facilities, or special
 equipment.  Class 4 procedures are not considered significant; therefore,
 reporting them is considered optional.  The Class 4 procedures not coded
 by the NHDS are listed in Appendix C.


Population Estimates

 Appendix B contains population estimates provided by the U.S. Bureau of
 the Census. The estimates cover the U.S. civilian noninstitutionalized
 population on July l of the data year. These population estimates are
 consistent with those published in Current Population Reports, Series
 P-25; however, these tables are not official population estimates of the
 Bureau of the Census.


Measurement Errors

 As in any survey, results are subject to nonsampling or measurement
 errors, which include errors due to hospital nonresponse, missing
 abstracts, information incompletely or inaccurately recorded on abstract
 forms, and processing errors.  Less than l percent of the discharge
 records failed to include age or sex of patient or date of admission or
 discharge.  If the hospital record did not state age or sex of patient, it
 was imputed by assigning the patient an age or sex consistent with the age
 or sex of other patients with the same diagnostic codes.  If the dates of
 admission or discharge were not given, and if they could not be obtained
 from the monthly sample listing sheet transmitted by the sample hospital,
 a length of stay was imputed by assigning the patient a stay
 characteristic of the stays of other patients of the same age.  In
 addition, nonresponse (about 6 percent) for principal expected source of
 payment was imputed to reflect similarities in sex and age.


Sampling Errors

 Procedures for calculating sampling errors are described in detail in
 Reference l.  Estimates of standard errors for a particular year
 calculated from NHDS data are available in the appendix of the NHDS
 publications for that year.  Generally, estimates from the NHDS generated
 from 30 or fewer records are deemed unreliable and not published by NCHS,
 and estimates based on 30-50 sampled records should be used with extreme
 caution.


Questions

 Questions concerning data on the tape should be directed to the Hospital
 Care Statistics Branch, Division of Health Care Statistics, National
 Center for Health Statistics, Center Building, Room 2-43, 3700 East-West
 Highway, Hyattsville, Maryland 20782, (301)-436-7125.

SAMPLE LAYOUT FOR FORM HDS-1 (1970-78)

 Form HDS-1     Form Approved
 Formerly HSM-SS-1      O.M.B. No. 68-R0620
 CONFIDENTIAL - All information which would permit identification of an
 individual or of an establishment will be held confidential, will be used
 only by persons engaged in and for the purposes of the survey and will not
 be disclosed or released to other persons or used for any other purpose.

        DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE
        Public Health Service
        Health Resources Administration
        National Center for Health Statistics
        MEDICAL ABSTRACT - HOSPITAL DISCHARGE SURVEY

 I. Patient Identification

        1. Hospital number
        4. Date of admission
        2. HDS number
        5. Date of discharge
        3. Medical record number

 II. Patient Characteristics

        1. Date of birth        2. Age (complete ONLY if date
                                   of birth not given): _______Units
                                   1 years  2   months  3   days

        3. Sex:   1   Male   2   Female

        4. Race or color:  1   White   2   Negro   3   Other nonwhite
                           4   "Nonwhite"   5   Not stated

        5. Marital status:  1   Married   2   Single   3   Widowed
                            4   Divorced   5   Separated   6   Not stated

        6. Discharge status:  1   Alive   2   Dead

 III. Diagnoses and Operations

        1. Final diagnoses

           a. Principal diagnosis:

           b. Other diagnoses:

        2. Operations

 Completed by                                           Date

 FOR NCHS USE ONLY

 Diagnoses

 Operations

        Figure I. Medical Abstract form
        1970 - 1976

 CONFIDENTIAL - All information which would permit
 identification of an individual or of an establishment will
 be held confidential, will be used only by persons engaged
 in and for the purposes of the survey, and will not be
 disclosed or released to other persons or used for any other purpose.

 FORM HDS-1     DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE
 (12-13-76)             PUBLIC HEALTH SERVICE
                   HEALTH RESOURCES ADMINISTRATION
                NATIONAL CENTER FOR HEALTH STATISTICS

                MEDICAL ABSTRACT - HOSPITAL DISCHARGE SURVEY

 A. PATIENT IDENTIFICATION

        1. Hospital number      4. Date of admission
        2. HDS number           5. Date of discharge
        3. Medical Record no.   6. Residence ZIP Code

 B. PATIENT CHARACTERISTICS

        7. Date of birth        8. Age (Complete only if Date of
                                   Birth not given)        Units
                                   1  Years  2  Months  3  Days

        9. Sex (Mark one)
           1    Male        2    Female       3    Not stated

        10. Race or Color (Mark one)
            1   White  2   Black  3   Other  4   Not stated

        11. Marital Status (Mark one)
            1   Married  2   Single  3   Widowed  4   Divorced  5   Separated
            6   Not stated

        12. Expected Source(s) of payment

            Principal      Other
            (Mark one)     (Mark all that apply)
            1              Self-pay
            2              Workmen's Compensation
            3              Medicare
            4              Medicaid
            5              Other government payments
            6              Blue Cross
            7              Other private or commercial insurance
            8              No charge
            9              Other (Specify)
           10              Not stated

 13. Disposition of Patient (Mark one)

        1    Routine discharge/discharged home
        2    Left against medical advise
        3    Discharged/transferred to another facility or organization
        4    Discharged/referred to organized home care service
        5    Died
        6    Not stated

 C. DIAGNOSES

        Principal:
        Other/additional:

 D. SURGICAL AND DIAGNOSTIC PROCEDURES                  Date
                                                  Month  Day  Year
        Principal:
        Other/additional:

                                       __NONE

 Completed by                                           Date

 *U.S. GOVERNMENT PRINTING OFFICE: 1976-738-230
        Figure 2.  Medical Abstract for the Hospital Discharge Survey
        1977 - 1978

RECORD LAYOUT

 This section consists of a detailed breakdown of each tape record,
 providing a brief description of each item of data included in the
 records. The data are arranged sequentially according to their physical
 location on the tape record.  Unless otherwise stated in the Item
 Description, the data are derived from the abstract form.  The NMF I and
 the hospital interview are alternate sources of data, while the computer
 generates other items.

Tape Record Format of the NHDS (1970-1978)

 DATA ITEMS                                                    TAPE LOCATION

 Sample Frame                                                       1
        1=Admission List
        2=Discharge List

2-3 Year (Added at CDC)
4 Panel Number
 DATA ITEMS                                                    TAPE LOCATION

 Panel Number                                                       4
        Codes range from 0 to 6

5-8 Hospital Number
9-10 Control Month
 DATA ITEMS                                                    TAPE LOCATION

 Control Month
        This code is either the Month of Admission                  9-10
        or Discharge depending upon the Sample Frame used in a
        hospital as coded in location 1

11-12 Blank
13-14 Century of Birth (18 or 19)
15-18 HDS Number
 DATA ITEMS                                                    TAPE LOCATION

 HDS Number
        This is the identifying Number assigned to                 15-18
        each discharge. This number in combination with the Hospital
        Number identifies a tape record.

19-24 Medical Record Number
 DATA ITEMS                                                    TAPE LOCATION

 Medical Record Number
        This is the Hospital Number for each discharge             19-24

25-30 Date of Birth
 DATA ITEMS                                                    TAPE LOCATION

 Date of Birth
        This item is used to calculate age at date of             (25-30)
        admission, if it passes the edit.(This item appears in the
        output record as it was in the input record except in the
        case of month imputed as 06 and/or day imputed as 15.)

 Month                                                     25-26
 Day                                                     27-28
 Year                                                     29-30
                         1970   00-70=1900-1970
                                71-99=1871-1899

                         1971   00-71=1900-1971
                                72-99=1872-1899

                         1972   00-72=1900-1972
                                73-99=1873-1899

                         1973   00-73=1900-1973
                                74-99=1874-1899

                         1974   00-74=1900-1974
                                75-99=1875-1899

                         1975   00-75=1900-1975
                                76-99=1876-1899

                         1976   00-76=1900-1976
                                77-99=1877-1899

                         1977   00-77=1900-1977
                                78-99=1878-1899

                         1978   00-78=1900-1978
                                79-99=1879-1899

31-33 Age
 DATA ITEMS                                                    TAPE LOCATION

 Age                                                     31-33
 Number (location 31-32)               Units (location 33)
        01-99................................1=Years
        01-11................................2=Months
        00-28................................3=Days

34 Sex
 DATA ITEMS                                                    TAPE LOCATION

 Sex
 1=Male                                                       34
 2=Female
 3=Not reported

35 Race
 DATA ITEMS                                                    TAPE LOCATION

 Race (Codes changed in 1977)                                         35
 (1970-1976)
        1=White (Includes Mexican & Puerto Rican)
        2=Black
        3=Other Nonwhite
        4="Nonwhite" (including Black & other nonwhite)
        5=Not stated
        6=Unknown

 (1977-1978)
        1=White
        2=Black
        3=Other
        4=Not stated
        9=Unknown

36 Marital Status
 DATA ITEMS                                                    TAPE LOCATION

 Marital Status                                                      36

        1=Married
        2=Single
        3=Widowed
        4=Divorced
        5=Separated
        6=Not stated
        7=Unknown

37-41 Date of Admission
 DATA ITEMS                                                    TAPE LOCATION

 Date of Admission*                                               (37-41)
        Month 01-12   January - December                           37-38
        Day   01-31                                                39-40
        Year (Last digit of year)                                     41
 *Imputed according to age if invalid or blank

42-46 Date of Discharge
 DATA ITEMS                                                    TAPE LOCATION

 Date of Discharge*                                               (42-46)
        Month**                                                    42-43
        Day**                                                   44-45
        Year (Last digit of year)                                     46
 *Imputed according to age if invalid or blank
 **Same codes as for Date of Admission

47 Discharge Status
 DATA ITEMS                                                    TAPE LOCATION

 Discharge Status (Codes changed in 1977)                             47
 (1970-1976)
        1=Alive
        2=Dead
        3=Not reported

 (1977-1978)
 1=Routine discharge/discharged home
 2=Left against medical advice
 3=Discharged/transferred to another facility or organization
 4=Discharged/referred to organized home care
 5=Died
 6=Not stated

48-67 Diagnostic Codes
 DATA ITEMS                                                    TAPE LOCATION

 Diagnostic Codes                                                 (48-67)
        There are from one to five 4-digit diagnostic codes located
        in positions specified below. Diagnoses are coded according
        to the INTERNATIONAL CLASSIFICATION OF DISEASES ADAPTED FOR
        USE IN THE UNITED STATES (EIGHTH REVISION) with certain
        modifications for the Hospital Discharge Survey.  (See "Medical
        "Medical Coding and Edit," Section II in text, and Appendix B.)

 Diagnostic Code 1                                                 48-51
 Diagnostic Code 2                                                 52-55
 Diagnostic Code 3                                                 56-59
 Diagnostic Code 4                                                 60-63
 Diagnostic Code 5                                                 64-67

68 Blank
69-77 Surgical Codes
 DATA ITEMS                                                    TAPE LOCATION

 Surgical Codes                                                   (69-77)
        There are from one to three 3-digit surgical codes located
        in positions specified below. Operations are coded according
        to the INTERNATIONAL CLASSIFICATION OF DISEASES ADAPTED FOR
        USE IN THE modifications for the Hospital Discharge Survey.
        (This item may be blank)
        (See "Medical Coding and Edit," Section II in text, and
        Appendix B.)

 Surgical Code 1                                                   69-71
 Surgical Code 2                                                   72-74
 Surgical Code 3                                                   75-77

78-81 Length of Stay in Days
 DATA ITEMS                                                    TAPE LOCATION

 Length of Stay in Days                                            78-81
        This item was generated in the computer on the basis of Date
        of Admission and Date of Discharge. In case of missing data
        for these items, this was imputed according to age.
        Codes range from 0000 to 0730.

82-83 Length of Stay Recode #1
 DATA ITEMS                                                    TAPE LOCATION

 Length of Stay Recode #1 (Computer Generated)                     82-83
        00-30=0-30 days
        31=31 days and over

84-85 Age Recode
 DATA ITEMS                                                    TAPE LOCATION

 Age Recode (Computer Generated)                                   84-85
        00=Newborn
        01=Under 1 year
        02=01-04 years
        03=05-14 years
        04=15-24 years
        05=25-34 years
        06=35-44 years
        07=45-54 years
        08=55-64 years
        09=65-74 years
        10=75 years and over

86 Race Recode
 DATA ITEMS                                                    TAPE LOCATION

 Race Recode (Computer Generated)                                     86
 (Codes changed in 1977)
 (1970-1976)
        1=White (Code 1 in col. 35)
        2=Nonwhite (Codes 2,3,4 in col. 35)
        3=Not stated (Codes 5,6 in col. 35)

 (1977-1978)
        1=White (Code 1 in col. 35)
        2=Nonwhite (Codes 2,3 in col. 35)
        3=Not stated (Codes 4,9 in col. 35)

87 Marital Status Recode
 DATA ITEMS                                                    TAPE LOCATION

 Marital Status Recode (Computer Generated)                           87
        1=Married (Codes 1,5 in col. 36)
        2=Not Married (Codes 2,3,4 in col. 36)
        3=Not stated (Codes 6,7 in col. 36)

88 Length of Stay Recode #2
 DATA ITEMS                                                    TAPE LOCATION

 Length of Stay Recode #2 (Computer Generated)                        88
        1=00-07 days
        2=08-14 days
        3=15-21 days
        4=22-28 days
        5=29 days and over

89-90 Blank
91 Geographic Region
 DATA ITEMS                                                    TAPE LOCATION

 Geographic Region (MFI)                                              91
 (See "Sampling Frame and Size of Sample,"
 Section I in text.)
        1=Northeast
        2=North Central
        3=South
        4=West

92 Blank
93 Geographic Region Census Divisions
 DATA ITEMS                                                    TAPE LOCATION

 Geographic Region (MFI) Census Divisions                             93
 (See "Sampling Frame and Size of Sample,"
 Section I in text.)
        1=New England
        2=Middle Atlantic       NE Region

        3=East North Central
        4=West North Central    NC Region

        5=South Atlantic
        6=East South Central
        7=West South Central    South Region

        8=Mountain
        9=Pacific               West Region

94-98 Number of Beds - Interview
 DATA ITEMS                                                    TAPE LOCATION

 Number of Beds - Interview                                        94-98
        (Blank beginning with '77 data)

99 Stratum
 DATA ITEMS                                                    TAPE LOCATION

 Stratum - Interview-Number of Beds Recode                            99
        (Computer Generated)
        1=6-49 beds
        2=50-99 beds
        3=100-199 beds
        4=200-299 beds
        5=300-499 beds
        6=500-999 beds
        7=1000 beds or more

100 Hospital Ownership - Interview
 DATA ITEMS                                                    TAPE LOCATION

 Hospital Ownership - Interview                                     100
        1=Proprietary
        2=Church
        3=Government (Non-federal - City,County & State)
        4=Nonprofit, excluding Church

101-104 Length of Stay in Days
 DATA ITEMS                                                    TAPE LOCATION

 Length of Stay in Days                                          101-104
 Date in 1978-81 has been transferred to this
 data field, with 0000 days recoded to 0001.

105-110 Blank
111-115 Weight
 DATA ITEMS                                                    TAPE LOCATION

 Weight                                                   111-115
        Final Adjusted Weight (Whole Number
        Used in Table Preparation)

116-130 Blank
131,133-136 Expected Source of Payment
 DATA ITEMS                                                    TAPE LOCATION

 Expected Source of Payment (ESOP)                              131,133-136
        (Effective beginning with '77 data)
        Column 131 represents Principal ESOP and columns         133-136
        represent Other ESOP. All five ESOP positions are coded as
        follows:
        1=Self-pay
        2=Workmen's Compensation
        3=Medicare
        4=Medicaid
        5=Other government payments
        6=Blue Cross
        7=Other private or commercial insurance
        8=No charge
        9=Other
        0=Not stated

Tape Record Format of the NHDS (1979-1985)
1 Sample Frame
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

   1         1             1            Sample Frame

                                          1: Admission List
                                          2: Discharge List

2-3 Year
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

   2       2-3             2            Year (Added to tape at CDC)

                                          79 - 85

4 Blank
5-7 Diagnosis-Related Group Code
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

   3       5-7             3            Diagnosis-Related Group Code (See
                                        text section, "Diagnosis-Related
                                        Groups")

                                        BLANK FOR YEARS 1979-81

8 Blank
9-10 Control Month
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

   4      9-10             2            Control Month

                                          This code is either the month of
                                          admission or discharge depending
                                          upon the sample frame used in a
                                          hospital as coded in Location 1.

                                            01: January through 12: December

11-12 Blank
13-14 Century of Birth (18 or 19)
15-24 Blank
25-30 Date of Birth
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

   6     25-30             6            Date of Birth

                                          This item is used to calculate age
                                          at date of admission, if it passes
                                          the edit.(This item appears in the
                                          output record as it was in the
                                          input record except in the case of
                                          month imputed as 06 and/or day
                                          imputed as 15.)

   6.1   25-26             2            Month of Birth

   6.2   27-28             2            Day of Birth

   6.3   29-30             2            Year of Birth

                                          00-85:  1900-1985
                                          86-99:  1886-1899

31-33 Age
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

   7     31-33             3            Age

                                             Units             Number
                                         (Location 33)    (Location 31-32)

                                           1:  Years            01-99
                                           2:  Months           01-11
                                           3:  Days             00-28

34 Sex
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

   8        34             1            Sex

                                          1:  Male
                                          2:  Female

35 Race
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

            35             1            Blank for Years 1981-1985
                                        Race for 1979
                                          1:  White
                                          2:  Black
                                          3:  Other/not stated

36 Marital Status
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

   9        36             1            Marital Status

                                          1:  Married
                                          2:  Single
                                          3:  Widowed
                                          4:  Divorced
                                          5:  Separated
                                          6:  Not Stated
                                          7:  Unknown

37-41 Date of Admission
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  10     37-41             5            Date of Admission

                                          (Imputed according to age if
                                           invalid or blank.)

  10.1   37-38             2            Month of Admission

                                          01:  January through
                                          12:  December

  10.2   39-40             2            Day of Admission

                                          01-31

  10.3      41             1            Year of Admission

                                          9:  1979
                                          0:  l980
                                          1:  1981
                                          2:  l982
                                          3:  1983
                                          4:  l984
                                          5:  1985

42-46 Date of Discharge
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  11     42-46             5            Date of Discharge

                                          (Imputed according to age if
                                           invalid or blank.)

  11.1   42-43             2            Month of Discharge

                                          01:  January through
                                          12:  December

  11.2   44-45             2            Day of Discharge

                                          01-31

  11.3      46             1            Year of Discharge

                                          9:  1979
                                          0:  l980
                                          1:  1981
                                          2:  l982
                                          3:  l983
                                          4:  l984
                                          5:  l985
                                          6:  l986

47 Discharge Status
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  12        47             1            Discharge Status

                                          (1979-1980)
                                        1:  Routine Discharge/Discharged Home
                                        2:  Left Against Medical Advice
                                        3:  Discharged/Transferred to Another
                                            Facility/Organization
                                        4:  Discharged/Referred to Organized
                                            Home Care Service
                                        5:  Dead
                                        6:  Not Stated
                                        9:  Not Stated

                                          (1981-1985)
                                        1:  Routine Discharge/Discharged Home
                                        2:  Left Against Medical Advice
                                        3:  Discharged/Transferred to
                                            Another Facility/Organization
                                        4:  Discharged/Referred to Organized
                                            Home Care Service
                                        5:  Alive, Disposition Not Stated
                                        6:  Dead
                                        7:  Not Stated

48 Blank
49 Age Recode
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  13        49             1            Age Recode

                                          1:  Less than 15 Years
                                          2:  15-44 Years
                                          3:  45-64 Years
                                          4:  65 Years and Over

50 Number of Diagnostic Codes Recorded
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  14        50             1            Number of Diagnostic Codes Recorded

                                          1 - Minimum
                                          7 - Maximum

51 Number of Surgical Codes Recorded
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  15        51             1            Number of Surgical Codes Recorded

                                          0 - Minimum
                                          4 - Maximum

52-56 Date of Surgery #3
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  16     52-56             5            Date of Surgery #3

  16.1   52-53             2            Month of Surgery

                                          01-12

  16.2   54-55             2            Day of Surgery

                                          01-31

  16.3      56             1            Year of Surgery

                                          9:  1979
                                          0:  l980
                                          1:  l981
                                          2:  1982
                                          3:  l983
                                          4:  l984
                                          5:  l985
                                          6:  l986

57-61 Date of Surgery #4
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  17     57-61             5            Date of Surgery #4

                                          Same format as above (52-56)

62-77 Blank
78-81 Length of Stay in Days
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  18     78-81             4            Length of Stay in Days

                                          This item was generated in the
                                          computer on the basis of date of
                                          admission and date of discharge.In
                                          case of blank or invalid date of
                                          admission and/or date of discharge,
                                          this item was imputed according to
                                          age. Codes range from 0000 to 0730.

82-83 Length of Stay Recode #1
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  19     82-83             2            Length of Stay Recode #1 (Computer
                                        Generated)

                                          00:  00 Days
                                          01:  01 Days
                                           .      .
                                           .      .
                                          31:  31 Days and Over

84-85 Age Recode
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  20     84-85             2            Age Recode (Computer Generated)

                                          00:  Newborn
                                          01:  Under 1 Year
                                          02:  01-04 Years
                                          03:  05-14 Years
                                          04:  15-24 Years
                                          05:  25-34 Years
                                          06:  35-44 Years
                                          07:  45-54 Years
                                          08:  55-64 Years
                                          09:  65-74 Years
                                          10:  75 Years and Over

86 Race Recode
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  21        86             1            Race Recode (Computer Generated)

                                         (1979 only)
                                          1:  White
                                          2:  All Other
                                          3:  Not Stated

                                         (1980-1985)
                                          1:  White
                                          2:  Black
                                          3:  American Indian/Eskimo/Aleut
                                          4:  Asian/Pacific Islander
                                          5:  Other
                                          6:  Not Stated

87 Marital Status Recode
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  22        87             1            Marital Status Recode (Computer
                                        Generated)

                                          1:  Married
                                          2:  Not Married
                                          3:  Not Stated

88 Length of Stay Recode #2
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  23        88             1            Length of Stay Recode #2 (Computer
                                        Generated)

                                          1:  00-07 Days
                                          2:  08-14 Days
                                          3:  15-21 Days
                                          4:  22-28 Days
                                          5:  29 Days and Over

89 Blank
90 Number of Beds Recode
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

            90             1            Number of Beds Recode (NMFI)
                                        (For 1979 ONLY--Years 1980-85 BLANK)

                                          1:  6-49 Beds
                                          2:  50-99 Beds
                                          3:  100-199 Beds
                                          4:  200-299 Beds
                                          5:  300-499 Beds
                                          6:  500-999 Beds
                                          7:  1,000 Beds or More

91 Geographic Region (NMFI)
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  24        91             1            Geographic Region (NMFI)

                                          1:  Northeast
                                          2:  North Central
                                          3:  South
                                          4:  West

92 Hospital Ownership (NMFI)
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

            92             1            Blank for Years 1980-85

                                        Hospital Ownership (NMFI)
                                        (1979 ONLY)

                                          1:  Proprietary
                                          2:  Church
                                          3:  Government
                                          4:  Nonprofit, Excluding Church

93 Geographic Division
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  25        93             1            Geographic Division

                                        Northeast Region

                                          1:  New England
                                          2:  Middle Atlantic

                                        North Central Region

                                          3:  East North Central
                                          4:  West North Central

                                        South Region

                                          5:  South Atlantic
                                          6:  East South Central
                                          7:  West South Central

                                        West Region

                                          8:  Mountain
                                          9:  Pacific

94-98 Blank
99 Number of Beds Recode
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  26        99             1            Number of Beds Recode (Interview)

                                          1:  6-49 Beds
                                          2:  50-99 Beds
                                          3:  100-199 Beds
                                          4:  200-299 Beds
                                          5:  300-499 Beds
                                          6:  500-999 Beds
                                          7:  1,000 Beds or More

100 Hospital Ownership
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  27       100             1            Hospital Ownership (Interview)

                                          1:  Proprietary
                                          2:  Church
                                          3:  Government
                                          4:  Nonprofit, Excluding Church

101-104 Length of Stay in Days
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  28     101-104           4            Length of Stay in Days

                                          Data in 78-81 has been transferred
                                          to this data field with 0000 days
                                          recoded to 0001.

105-110 Blank
111-115 Weight
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  29     111-115           5            Weight

                                          Final Adjusted Weight (whole
                                          number--used in table preparation)

116-130 Blank
131-136 Expected Source(s) of Payment
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  30     131-136           6            Expected Source(s) of Payment

  30.1       131           1              Principal No. 1
  30.2       132           1              Principal No. 2
  30.3       133           1              Other No. 1
  30.4       134           1              Other No. 2
  30.5       135           1              Other No. 3
  30.6       136           1              Other No. 4

                                        Code  Source of Payment
                                          (Years 1979-1980)
                                           l:  Self-Pay
                                           2:  Workman's Compensation
                                           3:  Medicare
                                           4:  Medicaid
                                           5:  Other Government Payment
                                           6:  Blue Cross
                                           7:  Other Private or Commercial
                                               Insurance
                                           8:  No Charge
                                           9:  Other
                                           0:  Not Stated

                                        Code  Source of Payment
                                          (Years 1981-1985)
                                           l:  Workmen's Compensation
                                           2:  Medicare
                                           3:  Medicaid
                                           4:  Title V
                                           5:  Other Government Payment
                                           6:  Blue Cross
                                           7:  Other Private Insurance
                                           8:  Self-Pay
                                           9:  No Charge
                                           0:  Other or Not Stated

137-141 Date of Surgery #1
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  31     137-141           5            Date of Surgery #1

                                        Same format as above (52-56)

142-146 Date of Surgery #2
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  32     142-146           5            Date of Surgery #2

                                        Same format as above (52-56)

147-148 Blank
149-183 Diagnostic Codes
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  33     149-183          35            Diagnostic Codes** (Five-Digit Codes)

  33.1   149-153           5            Diagnosis No. 1
  33.2   154-158           5            Diagnosis No. 2
  33.3   159-163           5            Diagnosis No. 3
  33.4   164-168           5            Diagnosis No. 4
  33.5   169-173           5            Diagnosis No. 5
  33.6   174-178           5            Diagnosis No. 6
  33.7   179-183           5            Diagnosis No. 7

184-199 Surgical Codes
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  34     184-199          16            Surgical Codes** (Four-Digit Codes)

  34.1   184-187           4            Surgery No. 1
  34.2   188-191           4            Surgery No. 2
  34.3   192-195           4            Surgery No. 3
  34.4   196-199           4            Surgery No. 4

200 Blank

General Information
 For 1979-1981 Diagnostic codes and Surgical codes are in compliance with
 the new International Classification of Diseases--9th Revision- Clinical
 Modification (ICD-9-CM). All codes are left justified. The symbol, "-", a
 dash, is used to fill all fourth and fifth spaces where three or four
 digit diagnostic codes are used and to fill all fourth spaces where three
 digit surgical codes are used.Codes can be preceded by the following
 symbols:
        In      Text    On Tape File
        E       appears as      )
        V       appears as      =

 Effective with 1982 data, there are no longer any dashes ("-") in spaces
 where subcodes are not used. These locations are now blank. Also E and V
 codes are punched as such -- not indicated by symbols as on previous
 tapes. Codes are in compliance with the ICD-9-CM.

Tape Record Format of the NHDS - 1986
1-2 Year 86 or 87
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

            1-2           2            YEAR  86 OR 87

3 Discharge Status Recode
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  1           3           l            Discharge Status Recode

                                          l:  Alive 2:  Dead 3:  Not Stated

4-12 Blank
13-14 Century of Birth
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  2       13-14           2            Century of Birth (18 or 19)

15-24 Blank
25-30 Date of Birth
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  3       25-30           6            Date of Birth

                                         This item is used to calculate age
                                         at date of admission, if it passes
                                         the edit.(This item appears in the
                                         output record as it was in the input
                                         record except in the case of month
                                         imputed as 06 and/or day imputed as
                                         15.)

  3.1     25-26           2            Month of Birth

  3.2     27-28           2            Day of Birth

  3.3     29-30           2            Year of Birth

                                          00-87:  1900-1987
                                          87-99:  1887-1899

31-33 Age
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  4       31-33           3            Age

                                           Units             Number
                                       (Location 33)    (Location 31-32)

                                         1:  Years            01-99
                                         2:  Months           01-11
                                         3:  Days             00-28

34 Sex
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  5          34           1            Sex

                                          1:  Male
                                          2:  Female

35 Blank
36 Marital Status
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  6          36           1            Marital Status

                                          1:  Married
                                          2:  Single
                                          3:  Widowed
                                          4:  Divorced
                                          5:  Separated
                                          6:  Not Stated
                                          7:  Unknown

37-41 Date of Admission
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  7       37-41           5            Date of Admission

                                        (Imputed according to age if invalid
                                         or blank.)

  7.1     37-38           2            Month of Admission

                                          01:  January through
                                          12:  December

  7.2     39-40           2            Day of Admission

                                          01-31

  7.3        41           1            Year of Admission

                                          5:  1985
                                          6:  l986

42-46 Date of Discharge
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  8       42-46           5            Date of Discharge

                                        (Imputed according to age if invalid
                                         or blank.)

  8.1     42-43           2            Month of Discharge

                                          01:  January through
                                          12:  December

  8.2     44-45           2            Day of Discharge

                                          01-31

  8.3        46           1            Year of Discharge

                                          6:  1986
                                          7:  l987

47 Discharge Status
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  9          47           1            Discharge Status

                                          1:  Routine Discharge/Discharged
                                              Home
                                          2:  Left Against Medical Advice
                                          3:  ?  Discharged/Transferred to
                                              Another Short-Term Hospital
                                          4:  ?  Discharged/Transferred to
                                              Long-Term Care Institution
                                          5:  Alive, DispositionNot Stated
                                          6:  Dead
                                          7:  Status Not Stated

48 Blank
49 Age Recode
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  10         49           1            Age Recode

                                          1:  Less than 15 Years
                                          2:  15-44 Years
                                          3:  45-64 Years
                                          4:  65 Years and Over

50 Number of Diagnostic Codes Recorded
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  11         50           1            Number of Diagnostic Codes Recorded

                                          1 - Minimum
                                          7 - Maximum

51 Number of Surgical Codes Recorded
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  14         51           1            Number of Surgical Codes Recorded

                                          0 - Minimum
                                          4 - Maximum

52-56 Date of Surgery #3
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  15      52-56           5            Date of Surgery #3

  15.1    52-53           2            Month of Surgery

                                          01-12

  15.2    54-55           2            Day of Surgery

                                          01-31

  15.3       56           1            Year of Surgery

                                          5:  1985
                                          6:  l986
                                          7:  l987

57-61 Date of Surgery #4
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  14      57-61           5            Date of Surgery #4

                                        Same format as above (52-56)

62-77 Blank
78-81 Length of Stay in Days
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  15      78-81           4            Length of Stay in Days

                                          This item was generated in the
                                          computer on the basis of date of
                                          admission and date of discharge.In
                                          case of blank or invalid date of
                                          admission and/or date of discharge,
                                          this item was imputed according to
                                          age. Codes range from 0000 to 0730.

82-83 Length of Stay Recode #1
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  16      82-83           2            Length of Stay Recode #1 (Computer
                                        Generated)

                                          00:  00 Days
                                          01:  01 Days
                                           .      .
                                           .      .
                                           .      .
                                          31:  31 Days and Over

84-85 Age Recode
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  17      84-85           2            Age Recode (Computer Generated)

                                          00:  Newborn
                                          01:  Under 1 Year
                                          02:  01-04 Years
                                          03:  05-14 Years
                                          04:  15-24 Years
                                          05:  25-34 Years
                                          06:  35-44 Years
                                          07:  45-54 Years
                                          08:  55-64 Years
                                          09:  65-74 Years
                                          10:  75 Years and Over

86 Race
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  18         86           1            Race

                                          1:  White
                                          2:  Black
                                          3:  American Indian/Eskimo/Aleut
                                          4:  Asian/Pacific Islander
                                          5:  Other
                                          6:  Not Stated

87 Marital Status Recode
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  19         87           1            Marital Status Recode (Computer
                                        Generated)

                                          1:  Married
                                          2:  Not Married
                                          3:  Not Stated

88 Length of Stay Recode #2
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  20         88           1            Length of Stay Recode #2 (Computer
                                        Generated)

                                          1:  00-07 Days
                                          2:  08-14 Days
                                          3:  15-21 Days
                                          4:  22-28 Days
                                          5:  29 Days and Over

89-90 Blank
91 Geographic Region (NMFI)
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  21         91           1            Geographic Region (NMFI)

                                          1:  Northeast
                                          2:  Midwest
                                          3:  South
                                          4:  West

92 Blank
93 Geographic Division
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  22         93           1            Geographic Division

                                        Northeast Region

                                          1:  New England
                                          2:  Middle Atlantic

                                        Midwest Region

                                          3:  East North Central
                                          4:  West North Central

                                        South Region

                                          5:  South Atlantic
                                          6:  East South Central
                                          7:  West South Central

                                        West Region

                                          8:  Mountain
                                          9:  Pacific

94-98 Blank
99 Number of Beds Recode
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  23         99           1            Number of Beds Recode (Interview)

                                          1:  6-49 Beds
                                          2:  50-99 Beds
                                          3:  100-199 Beds
                                          4:  200-299 Beds
                                          5:  300-499 Beds
                                          6:  500-999 Beds
                                          7:  1,000 Beds or More

100 Hospital Ownership (Interview)
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  24        100           1            Hospital Ownership (Interview)

                                          1:  Proprietary
                                          2:  Church
                                          3:  Government
                                          4:  Nonprofit, Excluding Church

101-104 Length of Stay in Days
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  25     101-104           4            Length of Stay in Days

                                        Data in 78-81 has been transferred
                                        to this data field with 0000 days
                                        recoded to 0001.

105-110 Blank
111-115 Weight
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  26     111-115           5            Weight

                                        Final Adjusted Weight (whole
                                        number--used in table preparation)

116-130 Blank
131-136 Expected Source(s) of Payment
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  27     131-136           6            Expected Source(s) of Payment

  27.1       131           1            Principal
  27.2       132           1            Other
  27.3       133           1            Other
  27.4       134           1            Other
  27.5       135           1            Other
  27.6       136           1            Other

                                        Code  Source of Payment

                                          1:  Workmen's Compensation
                                          2:  Medicare
                                          3:  Medicaid
                                     4 or 5:  Other Government Payment
                                          6:  Blue Cross
                                          7:  Other Private or Commercial
                                              Insurance
                                          8:  Self-Pay
                                          9:  No Charge
                                          0:  Other

137-141 Date of Surgery #1
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  28     137-141           5            Date of Surgery #1

                                        Same format as above (52-56)

142-146 Date of Surgery #2
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  29     142-146           5            Date of Surgery #2

                                        Same format as above (52-56)

147-148 Blank
149-183 Diagnostic Codes
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  30     149-183          35            Diagnostic Codes** (Five-Digit Codes)

  30.1   149-153           5            Diagnosis No. 1
  30.2   154-158           5            Diagnosis No. 2
  30.3   159-163           5            Diagnosis No. 3
  30.4   164-168           5            Diagnosis No. 4
  30.5   169-173           5            Diagnosis No. 5
  30.6   174-178           5            Diagnosis No. 6
  30.7   179-183           5            Diagnosis No. 7

 **Codes are in compliance with the ICD-9-CM. There is an implied decimal
 between positions 3 and 4 for each diagnostic code and between positions 2
 and 3 for each surgical code.

184-199 Surgical Codes
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  31     184-199          16            Surgical Codes** (Four-Digit Codes)

  31.1   184-187           4            Surgery No. 1
  31.2   188-191           4            Surgery No. 2
  31.3   192-195           4            Surgery No. 3
  31.4   196-199           4            Surgery No. 4

 **Codes are in compliance with the ICD-9-CM. There is an implied decimal
 between positions 3 and 4 for each diagnostic code and between positions 2
 and 3 for each surgical code.

200 Blank
201-203 DRGs 1-470, Grouper 2.0, Federal Register
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  32     201-203           3            DRGs 1-470, Grouper 2.0, Federal
                                        Register Thursday, September 1, 1983

204-206 DRGs 1-471, Grouper 3.0, Federal Register
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  33     204-206           3            DRGs 1-471, Grouper 3.0, Federal
                                        Register Tuesday, September 3, 1985

207-209 DRGs 1-473, Grouper 4.0, Federal Register
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  34     207-209           3            DRGs 1-473, Grouper 4.0, Federal
                                        Register Wednesday, September 3, 1986

210-212 DRGa 1-475, Grouper 5.0, Federal Register
 Item    Tape           Number of
 Number Location       Positions       Item Description and Codes

  35     210-212           3            DRGS 1-475, GROUPER 5.0, FEDERAL
    (NEW WITH '87 DATA)                 REGISTER WEDNESDAY, SEPTEMBER 1, 1987

TABLES ON CIVILIAN NONINSTITUTIONALIZED POPULATION
Civ. Noninst. Pop'n by Age & Sex for Regions & Divisions:U.S.,1970
                           (Rounded to thousands)

 Total
 Regions             All      0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages      years        years        years       and over

 UNITED STATES    199,574     57,705       81,174       41,478       19,218

 Northeast         48,380     13,294       19,312       10,811        4,963
 North Central     55,893     16,432       22,592       11,399        5,470
 South             61,338     18,071       25,051       12,397        5,818
 West              33,964      9,909       14,219       6,870         2,967

 New England       11,638      3,292        4,638       2,502         1,205
 Middle Atlantic   36,742     10,001       14,673       8,309         3,758

 East North
 Central           39,860     11,793       16,288       8,138         3,641
 West North
 Central           16,033      4,639        6,304       3,261         1,829

 South Atlantic    29,824      8,652       12,212       6,129         2,832
 East South
 Central           12,591      3,722        5,097       2,544         1,229
 West South
 Central           18,923      5,698        7,742       3,725         1,758

 Mountain           8,129      2,535        3,376       1,548           671
 Pacific           25,834      7,374       10,843       5,322         2,296

                                            Male

 Regions             All      0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES     95,978     29,391       38,750       19,746        8,091

 Northeast         23,154     6,782         9,235        5,094        2,043
 North Central     27,116     8,378        10,933        5,481        2,325
 South             29,280     9,186        11,801        5,838        2,455
 West              16,428     5,045         6,782        3,333        1,268

 New England        5,576     1,681         2,229        1,183          483
 Middle Atlantic   17,578     5,101         7,006        3,911        1,560

 East North
 Central           19,352     6,010         7,889        3,912        1,541
 West North
 Central            7,764     2,367         3,044        1,569          784

 South Atlantic    14,160     4,397         5,701        2,871        1,191
 East South
 Central            6,033     1,894         2,423        1,197          519
 West South
 Central            9,087     2,895         3,677        1,771          745

 Mountain           3,961     1,290         1,614          755          302
 Pacific           12,467     3,756         5,168        2,578          966

                                           Female
 Regions             All      0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES    103,596     28,314       42,423       21,732       11,127

 Northeast         25,226      6,512       10,077        5,717        2,920
 North Central     28,776      8,054       11,659        5,918        3,145
 South             32,058      8,885       13,250        6,559        3,363
 West              17,536      4,863        7,437        3,537        1,698

 New England        6,063      1,612        2,410        1,319          722
 Middle Atlantic   19,164      4,901        7,667        4,398        2,198

 East North
 Central           20,508      5,782        8,399        4,227        2,100
 West North
 Central            8,268      2,271        3,260        1,692        1,045

 South Atlantic    15,664      4,255        6,511        3,258        1,640
 East South
 Central            6,558      1,828        2,674        1,347          710
 West South
 Central            9,836      2,803        4,065        1,954        1,013

 Mountain           4,169      1,245        1,762          793          369
 Pacific           13,367      3,618        5,675        2,744        1,330

Civ. Noninst. Pop'n by Age & Sex for Regions & Divisions:U.S.,1971
                                   (Rounded to thousands)

                                           Total

 Regions            All       0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES    202,090     57,368       83,252       41,891       19,579

 Northeast         48,818     13,216       19,708       10,863        5,031
 North Central     56,310     16,267       23,076       11,440        5,527
 South             62,376     17,984       25,795       12,606        5,991
 West              34,586      9,900       14,673        6,982        3,030

 New England       11,775      3,281        4,753        2,521        1,219
 Middle Atlantic   37,043      9,935       14,955        8,342        3,811

 East North
 Central           40,127     11,673       16,617        8,166        3,672
 West North
 Central           16,183      4,595        6,460        3,274        1,855

 South Atlantic    30,384      8,625       12,581        6,253        2,926
 East South
 Central           12,778      3,691        5,243        2,582        1,262
 West South
 Central           19,214      5,669        7,971        3,771        1,803

 Mountain           8,389      2,561        3,532        1,598          698
 Pacific           26,197      7,339       11,141        5,384        2,332

                                             Male

 Regions             All      0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES     97,330     29,227       39,992       19,912        8,199

 Northeast         23,400      6,744        9,486        5,111        2,059
 North Central     27,358      8,296       11,237        5,491        2,334
 South             29,818      9,145       12,228        5,929        2,516
 West              16,754      5,042        7,041        3,381        1,290

 New England        5,652      1,676        2,299        1,192          486
 Middle Atlantic   17,748      5,068        7,188        3,919        1,573

 East North
 Central           19,511      5,950        8,099        3,917        1,544
 West North
 Central            7,847      2,345        3,139        1,574          790

 South Atlantic    14,445      4,385        5,909        2,926        1,226
 East South
 Central            6,131      1,879        2,509        1,213          530
 West South
 Central            9,242      2,881        3,811        1,790          760

 Mountain           4,092      1,304        1,698          778          313
 Pacific           12,662      3,739        5,343        2,604          977

                                           Female

 Regions             All      0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES    104,760     28,141       43,259       21,979       11,380

 Northeast         25,418      6,472       10,222        5,752        2,972
 North Central     28,952      7,971       11,839        5,949        3,193
 South             32,558      8,839       13,567        6,677        3,475
 West              17,832      4,858        7,632        3,601        1,741

 New England        6,123      1,606        2,454        1,329          733
 Middle Atlantic   19,295      4,866        7,768        4,423        2,238

 East North
 Central           20,616      5,722        8,518        4,248        2,128
 West North
 Central            8,335      2,249        3,321        1,700        1,065

 South Atlantic    15,939      4,240        6,672        3,328        1,700
 East South
 Central            6,647      1,812        2,734        1,369          732
 West South
 Central            9,972      2,788        4,160        1,981        1,043

 Mountain           4,297      1,258        1,833          821          385
 Pacific           13,535      3,601        5,799        2,780        1,355

Civ. Noninst. Pop'n by Age & Sex for Regions & Divisions:U.S.,1972
        (Consistent with Current Population Reports Series P-25, No.500.)
        (Numbers in thousands)
                                            Total

 Regions           All        0 - 14      15 - 44      45 - 64      65 years
 and divisions     ages        years       years        years       and over

 UNITED STATES   204,229      56,609       85,445       42,248       19,927

 Northeast        49,011      12,949       20,070       10,957        5,035
 North Central    56,727      15,963       23,678       11,509        5,576
 South            63,357      17,901       26,570       12,685        6,201
 West             35,134       9,795       15,127        7,097        3,114

 New England      11,860       3,213        4,878        2,544        1,225
 Middle Atlantic  37,151       9,736       15,192        8,413        3,810

 East North
 Central          40,415      11,460       17,019        8,224        3,712
 West North
 Central          16,312       4,504        6,659        3,285        1,864

 South Atlantic   30,917       8,578       12,971        6,312        3,056
 East South
 Central          12,895       3,662        5,374        2,569        1,290
 West South
 Central          19,545       5,662        8,225        3,804        1,855

 Mountain          8,652       2,581        3,707        1,642          723
 Pacific          26,481       7,215       11,420        5,456        2,391

                                            Male

 Regions            All       0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES    98,511      28,844       41,313       20,054        8,300

 Northeast        23,526       6,608        9,720        5,147        2,052
 North Central    27,612       8,143       11,607        5,517        2,345
 South            30,324       9,104       12,678        5,956        2,586
 West             17,050       4,990        7,309        3,434        1,317

 New England       5,698       1,640        2,374        1,199          486
 Middle Atlantic  17,827       4,968        7,346        3,948        1,565

 East North
 Central          19,688       5,843        8,349        3,941        1,555
 West North
 Central           7,924       2,300        3,257        1,576          791

 South Atlantic   14,714       4,361        6,134        2,948        1,271
 East South
 Central           6,196       1,865        2,587        1,205          539
 West South
 Central           9,414       2,878        3,957        1,803          777

 Mountain          4,230       1,314        1,795          798          322
 Pacific          12,820       3,676        5,514        2,635          995

        Female

 Regions           All        0 - 14      15 - 44      45 - 64      65 years
 and divisions      Ages       years       years        years       and over

 UNITED STATES   105,718      27,764       44,133       22,194       11,627

 Northeast        25,485       6,341       10,351        5,810        2,984
 North Central    29,115       7,821       12,072        5,992        3,231
 South            33,033       8,797       13,893        6,729        3,615
 West             18,084       4,805        7,818        3,664        1,797

 New England       6,162       1,573        2,505        1,345          739
 Middle Atlantic  19,324       4,768        7,846        4,464        2,245

 East North
 Central          20,726       5,617        8,669        4,283        2,158
 West North
 Central           8,389       2,204        3,402        1,709        1,073

 South Atlantic   16,203       4,216        6,837        3,364        1,786
 East South
 Central           6,699       1,797        2,787        1,364          751
 West South
 Central          10,131       2,784        4,268        2,001        1,078

 Mountain          4,423       1,267        1,911          843          401
 Pacific          13,661       3,538        5,906        2,820        1,397

Civ. Noninst. Pop'n by Age & Sex for Regions & Divisions:U.S.,1973
                                    (Numbers in thousands)

                                            Total

 Regions            All       0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES   205,836      55,559       87,342       42,641       20,294

 Northeast        48,940      12,565       20,327       10,957        5,087
 North Central    56,772      15,538       24,081       11,517        5,636
 South            64,499      17,791       27,379       12,951        6,378
 West             35,625       9,666       15,554        7,214        3,191

 New England      11,915       3,127        4,988        2,554        1,246
 Middle Atlantic  37,025       9,438       15,339        8,405        3,843

 East North
 Central          40,382      11,136       17,273        8,219        3,754
 West North
 Central          16,391       4,402        6,809        3,298        1,882

 South Atlantic   31,621       8,539       13,424        6,492        3,166
 East South
 Central          13,067       3,605        5,510        2,606        1,316
 West South
 Central          19,810       5,617        8,440        3,852        1,896

 Mountain          8,952       2,606        3,894        1,706          746
 Pacific          26,673       7,560       11,660        5,508        2,445

                                            Male

 Regions            All       0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES    99,307      28,313       42,253       20,310        8,451

 Northeast        23,494       6,413        9,849        5,165        2,067
 North Central    27,640       7,926       11,811        5,540        2,363
 South            30,878       9,049       13,072        6,102        2,655
 West             17,294       4,925        7,520        3,503        1,346

 New England       5,725       1,597        2,428        1,207          493
 Middle Atlantic  17,769       4,816        7,421        3,958        1,574

 East North
 Central          19,676       5,678        8,479        3,952        1,567
 West North
 Central           7,963       2,248        3,332        1,587          796

 South Atlantic   15,052       4,342        6,353        3,043        1,314
 East South
 Central           6,281       1,851        2,654        1,227          549
 West South
 Central           9,544       2,855        4,065        1,832          792

 Mountain          4,379       1,327        1,887          833          332
 Pacific          12,916       3,598        5,633        2,670        1,015

                                           Female

 Regions            All       0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES   106,529      27,246       45,088       22,331       11,862

 Northeast        25,444       6,151       10,478        5,793        3,022
 North Central    29,131       7,612       12,270        5,977        3,272
 South            33,621       8,742       14,307        6,849        3,723
 West             18,331       4,741        8,033        3,712        1,845

 New England       6,189       1,530        2,560        1,346          753
 Middle Atlantic  19,256       4,622        7,988        4,447        2,269

 East North
 Central          20,704       5,457        8,794        4,267        2,186
 West North
 Central           8,426       2,154        3,476        1,710        1,086

 South Atlantic   16,570       4,197        7,071        3,450        1,852
 East South
 Central           6,786       1,784        2,856        1,379          767
 West South
 Central          10,265       2,761        4,380        2,020        1,104

 Mountain          4,573       1,279        2,006          874          414
 Pacific          13,757       3,462        6,027        2,838        1,430

Civ. Noninst. Pop'n by Age & Sex for Regions & Divisions:U.S.,1974
                                   (Numbers in thousands)

                                           Total

 Regions            All       0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES   207,386      54,479       89,271       42,884       20,751

 Northeast        48,716      12,148       20,515       10,897        5,155
 North Central    56,705      15,076       24,452       11,472        5,705
 South            65,647      17,668       28,220       13,163        6,597
 West             36,318       9,588       16,084        7,353        3,293

 New England      11,943       3,036        5,085        2,554        1,268
 Middle Atlantic  36,773       9,112       15,430        8,343        3,887

 East North
 Central          40,337      10,814       17,531        8,192        3,801
 West North
 Central          16,368       4,262        6,921        3,280        1,905

 South Atlantic   32,351       8,502       13,906        6,648        3,296
 East South
 Central          13,162       3,580        5,619        2,612        1,350
 West South
 Central          20,134       5,586        8,694        3,904        1,951

 Mountain          9,216       2,619        4,062        1,758          778
 Pacific          27,101       6,969       12,022        5,595        2,516

 Male
 Regions            All       0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES   100,067      27,774       43,275       20,431        8,587

 Northeast        23,387       6,203        9,961        5,138        2,085
 North Central    27,614       7,694       12,018        5,519        2,383
 South            31,430       8,990       13,502        6,204        2,735
 West             17,636       4,887        7,794        3,571        1,384

 New England       5,739       1,552        2,481        1,208          499
 Middle Atlantic  17,648       4,651        7,480        3,930        1,586

 East North
 Central          19,661       5,516        8,624        3,940        1,581
 West North
 Central           7,953       2,177        3,395        1,579          802

 South Atlantic   15,399       4,325        6,595        3,116        1,362
 East South
 Central           6,327       1,824        2,713        1,230          561
 West South
 Central           9,704       2,841        4,194        1,857          812

 Mountain          4,509       1,334        1,973          858          344
 Pacific          13,126       3,553        5,821        2,713        1,040

                                           Female

 Regions          All         0 - 14      15 - 44      45 - 64      65 years
 and divisions    ages         years       years        years       and over

 UNITED STATES   107,318      26,706       45,996       22,453       12,163

 Northeast        25,328       5,945       10,554        5,760        3,070
 North Central    29,091       7,382       12,434        5,952        3,322
 South            34,217       8,678       14,718        6,959        3,862
 West             18,682       4,701        8,290        3,782        1,909

 New England       6,204       1,485        2,604        1,346          768
 Middle Atlantic  19,125       4,460        7,950        4,413        2,302

 East North
 Central          20,677       5,297        8,908        4,252        2,220
 West North
 Central           8,414       2,085        3,527        1,701        1,102

 South Atlantic   16,952       4,177        7,311        3,531        1,933
 East South
 Central           6,835       1,756        2,907        1,382          790
 West South
 Central          10,430       2,745        4,500        2,046        1,139

 Mountain          4,707       1,285        2,089          900          433
 Pacific          13,975       3,416        6,201        2,882        1,476

Civ. Noninst. Pop'n by Age & Sex for Regions & Divisions:U.S.,1975
                             (Numbers in thousands)

                                      Total

 Regions            All       0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES   209,095      53,514       91,166       43,109       21,305

 Northeast        48,745      11,821       20,792       10,880        5,253
 North Central    56,820      14,701       24,870       11,452        5,797
 South            66,581      17,481       28,948       13,314        6,838
 West             36,948       9,511       16,556        7,463        3,418

 New England      11,990       2,953        5,191        2,554        1,291
 Middle Atlantic  36,755       8,867       15,601        8,325        3,962

 East North
 Central          40,444      10,559       17,831        8,190        3,864
 West North
 Central          16,376       4,142        7,039        3,261        1,933

 South Atlantic   32,861       8,399       14,279        6,737        3,446
 East South
 Central          13,318       3,543        5,754        2,635        1,385
 West South
 Central          20,402       5,538        8,914        3,942        2,008

 Mountain          9,450       2,624        4,213        1,800          812
 Pacific          27,498       6,887       12,343        5,663        2,606

                                            Male

 Regions            All       0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES   100,881      27,283       44,262       20,553        8,784

 Northeast        23,396       6,036       10,111        5,133        2,115
 North Central    27,668       7,503       12,240        5,513        2,412
 South            31,875       8,895       13,876        6,279        2,825
 West             17,942       4,848        8,035        3,627        1,432

 New England       5,760       1,509        2,536        1,209          506
 Middle Atlantic  17,635       4,527        7,575        3,924        1,609

 East North
 Central          19,712       5,387        8,782        3,942        1,601
 West North
 Central           7,956       2,116        3,457        1,571          811

 South Atlantic   15,639       4,273        6,786        3,161        1,419
 East South
 Central           6,402       1,805        2,782        1,242          573
 West South
 Central           9,834       2,817        4,308        1,877          833

 Mountain          4,625       1,337        2,050          879          359
 Pacific          13,317       3,511        5,986        2,748        1,073

                                           Female

 Regions            All       0 - 14      15 - 44      45 - 64      65 years
 and divisions      ages       years       years        years       and over

 UNITED STATES   108,212      26,231       46,904       22,556       12,521

 Northeast        25,350       5,784       10,681        5,747        3,138
 North Central    29,152       7,198       12,631        5,938        3,384
 South            34,705       8,585       15,072        7,035        4,013
 West             19,005       4,663        8,520        3,836        1,986

 New England       6,230       1,444        2,655        1,346          785
 Middle Atlantic  19,120       4,340        8,026        4,401        2,352

 East North
 Central          20,732       5,172        9,049        4,248        2,263
 West North
 Central           8,420       2,026        3,582        1,690        1,122

 South Atlantic   17,222       4,126        7,493        3,577        2,026
 East South
 Central           6,915       1,738        2,972        1,394          812
 West South
 Central          10,568       2,721        4,607        2,065        1,175

 Mountain          4,825       1,287        2,163          921          453
 Pacific          14,180       3,375        6,357        2,915        1,533

Civ. Noninst. Pop'n by Age & Sex for Regions & Divisions:U.S.,1976
                                   (Numbers in thousands)

                                           Total

 Regions          All         0 - 14      15 - 44      45 - 64      65 years
 and divisions    ages         years       years        years       and over

 UNITED STATES   210,575      52,375       93,132       43,261       21,807

 Northeast        48,778      11,457       21,098       10,864        5,359
 North Central    56,876      14,285       25,284       11,416        5,891
 South            67,302      17,213       29,657       13,404        7,028
 West             37,619       9,420       17,093        7,577        3,529

 New England      12,016       2,854        5,292        2,551        1,319
 Middle Atlantic  36,762       8,603       15,806        8,313        4,040

 East North
 Central          40,393      10,239       18,070        8,146        3,937
 West North
 Central          16,484       4,046        7,214        3,270        1,954

 South Atlantic   33,124       8,217       14,583        6,770        3,553
 East South
 Central          13,429       3,488        5,879        2,646        1,415
 West South
 Central          20,750       5,507        9,195        3,988        2,060

 Mountain          9,631       2,611        4,346        1,830          844
 Pacific          27,988       6,807       12,747        5,747        2,685

                                            Male

 Regions          All         0 - 14      15 - 44      45 - 64      65 years
 and divisions    ages         years       years        years       and over

 UNITED STATES   101,606      26,713       45,288       20,638        8,968

 Northeast        23,409       5,853       10,276        5,128        2,152
 North Central    27,700       7,294       12,462        5,499        2,445
 South            32,224       8,762       14,239        6,326        2,896
 West             18,273       4,804        8,310        3,684        1,475

 New England       5,772       1,459        2,589        1,208          515
 Middle Atlantic  17,638       4,394        7,687        3,921        1,636

 East North
 Central          19,690       5,226        8,914        3,923        1,627
 West North
 Central           8,011       2,068        3,549        1,576          818

 South Atlantic   15,762       4,182        6,942        3,178        1,460
 East South
 Central           6,457       1,778        2,847        1,248          584
 West South
 Central          10,005       2,802        4,450        1,900          852

 Mountain          4,715       1,331        2,118          894          372
 Pacific          13,558       3,473        6,192        2,790        1,103

                                           Female

 Regions          All         0 - 14      15 - 44      45 - 64      65 years
 and divisions    ages         years       years        years       and over

 UNITED STATES   108,969      25,663       47,844       22,623       12,839

 Northeast        25,369       5,604       10,822        5,736        3,207
 North Central    29,176       6,992       12,821        5,917        3,446
 South            35,078       8,450       15,417        7,079        4,132
 West             19,346       4,616        8,783        3,892        2,054

 New England       6,244       1,395        2,702        1,343          804
 Middle Atlantic  19,124       4,209        8,120        4,392        2,403

 East North
 Central          20,703       5,013        9,156        4,223        2,310
 West North
 Central           8,473       1,978        3,665        1,694        1,136

 South Atlantic   17,362       4,035        7,641        3,592        2,093
 East South
 Central           6,972       1,710        3,032        1,398          831
 West South
 Central          10,745       2,705        4,744        2,088        1,207

 Mountain          4,916       1,280        2,228          935          472
 Pacific          14,430       3,336        6,555        2,957        1,582

Civ. Noninst. Pop'n by Age & Sex for Regions & Divisions:U.S.,1977
                                   (Numbers in thousands)

                                           Total

 Regions          All         0 - 14      15 - 44      45 - 64      65 years
 and divisions    ages         years       years        years       and over

 UNITED STATES   212,182      51,481       95,060       43,357       22,284

 Northeast        48,529      11,081       21,267       10,761        5,421
 North Central    57,055      13,950       25,722       11,387        5,996
 South            68,278      17,063       30,455       13,536        7,225
 West             38,319       9,386       17,616        7,674        3,643

 New England      12,024       2,761        5,387        2,543        1,332
 Middle Atlantic  36,505       8,319       15,880        8,217        4,088

 East North
 Central          40,498      10,001       18,367        8,123        4,007
 West North
 Central          16,559       3,951        7,355        3,264        1,988

 South Atlantic   33,429       8,070       14,890        6,803        3,666
 East South
 Central          13,601       3,458        6,026        2,670        1,447
 West South
 Central          21,248       5,534        9,538        4,063        2,112

 Mountain          9,829       2,621        4,472        1,856          879
 Pacific          28,490       6,764       13,144        5,817        2,765

                                            Male

 Regions          All         0 - 14      15 - 44      45 - 64      65 years
 and divisions    ages         years       years        years       and over

 UNITED STATES   102,399      26,260       46,231       20,704        9,204

 Northeast        23,292       5,662       10,360        5,085        2,186
 North Central    27,796       7,123       12,684        5,490        2,499
 South            32,694       8,687       14,622        6,394        2,991
 West             18,617       4,787        8,566        3,735        1,529

 New England       5,777       1,412        2,637        1,206          523
 Middle Atlantic  17,515       4,250        7,723        3,879        1,663

 East North
 Central          19,747       5,105        9,064        3,915        1,663
 West North
 Central           8,050       2,020        3,620        1,575          836

 South Atlantic   15,903       4,108        7,086        3,196        1,513
 East South
 Central           6,542       1,763        2,919        1,260          600
 West South
 Central          10,249       2,816        4,617        1,938          878

 Mountain          4,813       1,336        2,180          908          389
 Pacific          13,804       3,451        6,386        2,827        1,140

                                            Female

 Regions          All         0 - 14      15 - 44      45 - 64      65 years
 and divisions    ages         years       years        years       and over

 UNITED STATES   109,782      25,220       48,828       22,653       13,080

 Northeast        25,237       5,419       10,907        5,676        3,235
 North Central    29,259       6,827       13,038        5,896        3,497
 South            35,584       8,375       15,833        7,142        4,234
 West             19,702       4,599        9,051        3,938        2,114

 New England       6,247       1,349        2,750        1,338          810
 Middle Atlantic  18,990       4,070        8,157        4,338        2,425

 East North
 Central          20,750       4,896        9,303        4,207        2,344
 West North
 Central           8,509       1,932        3,736        1,689        1,153

 South Atlantic   17,526       3,962        7,804        3,606        2,153
 East South
 Central           7,060       1,695        3,107        1,410          847
 West South
 Central          10,999       2,718        4,921        2,126        1,235

 Mountain          5,016       1,285        2,293          948          490
 Pacific          14,686       3,314        6,758        2,990        1,624

Civ. Noninst. Pop'n by Age & Sex for Regions & Divisions:U.S.,1978
                                  (Numbers in thousands)

                                           Total

 Regions          All         0 - 14      15 - 44      45 - 64      65 years
 and divisions    ages         years       years        years       and over

 UNITED STATES   213,873      50,701       96,943       43,424       22,805

 Northeast        48,326      10,735       21,440       10,646        5,505
 North Central    57,370      13,697       26,216       11,375        6,082
 South            69,028      16,887       31,085       13,608        7,449
 West             39,149       9,382       18,202        7,796        3,769

 New England      12,039       2,675        5,473        2,527        1,365
 Middle Atlantic  36,287       8,060       15,967        8,119        4,141

 East North
 Central          40,676       9,811       18,686        8,102        4,067
 West North
 Central          16,694       3,886        7,520        3,273        2,015

 South Atlantic S 33,679       7,930       15,133        6,813        3,803
 East South
 Central          13,765       3,442        6,154        2,691        1,478
 West South
 Central          21,584       5,515        9,798        4,103        2,168

 Mountain         10,084       2,643        4,626        1,892          923
 Pacific          29,065       6,739       13,577        5,904        2,846

                                            Male

 Regions          All         0 - 14      15 - 44      45 - 64      65 years
 and divisions    ages         years       years        years       and over

 UNITED STATES   103,209      25,867       47,188       20,749        9,404

 Northeast        23,188       5,486       10,452        5,033        2,217
 North Central    27,949       6,996       12,935        5,487        2,531
 South            33,051       8,599       14,942        6,432        3,078
 West             19,021       4,786        8,859        3,797        1,580

 New England       5,781       1,368        2,680        1,198          535
 Middle Atlantic  17,406       4,118        7,772        3,835        1,682

 East North
 Central          19,833       5,009        9,232        3,907        1,685
 West North
 Central           8,115       1,987        3,703        1,580          845

 South Atlantic   16,018       4,037        7,211        3,203        1,567
 East South
 Central           6,621       1,755        2,984        1,271          612
 West South
 Central          10,412       2,807        4,748        1,958          899

 Mountain          4,938       1,348        2,257          926          408
 Pacific          14,083       3,438        6,602        2,871        1,172

                                           Female

 Regions          All         0 - 14      15 - 44      45 - 64      65 years
 and divisions    ages         years       years        years       and over

 UNITED STATES   110,665      24,834       49,755       22,675       13,400

 Northeast        25,138       5,249       10,987        5,613        3,289
 North Central    29,422       6,702       13,281        5,887        3,551
 South            35,977       8,288       16,143        7,176        4,371
 West             20,128       4,596        9,344        3,999        2,189

 New England       6,258       1,307        2,792        1,329          830
 Middle Atlantic  18,881       3,942        8,195        4,284        2,459

 East North
 Central          20,843       4,802        9,464        4,195        2,382
 West North
 Central           8,579       1,899        3,817        1,693        1,169

 South Atlantic   17,661       3,893        7,922        3,610        2,236
 East South
 Central           7,144       1,687        3,171        1,420          866
 West South
 Central          11,172       2,708        5,050        2,145        1,269

 Mountain          5,146       1,296        2,369          966          516
 Pacific          14,982       5,300        6,974        3,033        1,674

Civ. Noninst. Pop'n by Age, Sex, & Geo. Region: U.S., 1979
 (Population estimates consistent with Series P-25, Current Population
 Reports, U.S. Bureau of the Census)

        Ages & Region           Both sexes         Male         Female

                                          Population in thousands

        All Ages                  215,884         104,180       111,704

 Northeast                         48,232          23,138        25,094
 North Central                     57,515          28,021        29,493
 South                             69,941          33,486        36,456
 West                              40,193          19,533        20,660

 0 - 14 years                      50,092          25,563        24,530
 Under 1 year                       3,279           1,679         1,600
 1 - 4 years                       12,362           6,319         6,043
 5 - 14 years                      34,451          17,564        16,887

 Northeast                         10,416           5,324         5,092
 North Central                     13,433           6,862         6,570
 South                             16,766           8,540         8,226
 West                               9,477           4,836         4,641

 15 - 44 years                     98,941          48,197        50,744

 15 - 24 years                     40,162          19,760        20,402
 25 - 34 years                     34,099          16,570        17,528
 35 - 44 years                     24,680          11,866        12,813

 Northeast                         21,679          10,577        11,102
 North Central                     26,588          13,128        13,460
 South                             31,808          15,303        16,506
 West                              18,865           9,189         9,676

 45 - 64 years                     43,481          20,786        22,695

 45 - 54 years                     22,747          10,995        11,752
 55 - 64 years                     20,734           9,792        10,943

 Northeast                         10,543           4,986         5,557
 North Central                     11,331           5,468         5,863
 South                             13,665           6,462         7,203
 West                               7,942           3,870         4,072

 65 years and over                 23,369           9,634        13,735

 65 - 74 years                     14,950           6,505         8,445
 75 years and over                  8,419           3,129         5,290

 Northeast                          5,594           2,251         3,343
 North Central                      6,163           2,563         3,600
 South                              7,702           3,181         4,521
 West                               3,909           1,638         2,271

Civilian Resident Pop'n by Age & Sex: U.S., 1980
 (Population estimates consistent with Series P-25, Current Population
 Reports, U.S. Bureau of the Census)

                                Both sexes           Male        Female

                                          Population in thousands

        All Ages                  225,552         108,895       116,657

 0 - 14 years                      51,270          26,208        25,063
 Under 1 year                       3,548           1,815         1,733
 1 - 4 years                       12,900           6,598         6,303
 5 - 14 years                      34,822          17,795        17,027

 15 - 44 years                    104,126          51,203        52,923

 15 - 24 years                     41,605          20,645        20,960
 25 - 34 years                     36,920          18,105        18,815
 35 - 44 years                     25,601          12,453        13,148

 45 - 64 years                     44,448          21,121        23,328

 45 - 54 years                     22,696          10,948        11,749
 55 - 64 years                     21,752          10,173        11,579

 65 years and over                 25,708          10,363        15,345

 65 - 74 years                     15,648           6,787         8,861
 75 - 84 years                      7,787           2,886         4,901
 85 years and over                  2,274             691         1,583

Civ. Pop'n by Age, Sex, Geo. Region, & Race: U.S., 1981
 (Population estimates consistent with Series P-25, Current Population
 Reports, U.S. Bureau of the Census)

        Age, geographic           Both sexes         Male         Female
        region and race
        Population in thousands

        All ages                    227,659         109,912       117,747

 Northeast                           49,213          23,472        25,741
 North Central                       58,741          28,492        30,249
 South                               76,082          36,572        39,511
 West                                43,623          21,376        22,246

 White                              195,338          94,689       100,650
 Black                               26,870          12,579        14,291
 All other                            5,450           2,644         2,806

 0 - 14 years                        51,226          26,192        25,034

 Under 1 year                         3,591           1,839         1,752
 1 - 4 years                         13,348           6,828         6,520
 5 - 14 years                        34,286          17,525        16,762

 Northeast                           10,165           5,196         4,968
 North Central                       13,445           6,882         6,563
 South                               17,594           8,989         8,604
 West                                10,021           5,124         4,898

 White                               42,003          21,536        20,467
 Black                                7,725           3,892         3,833
 All other                            1,498             764           734

 15 - 44 years                      105,748          52,048        53,699

 15 - 24 years                       41,231          20,484        20,745
 25 - 34 years                       38,282          18,791        19,491
 35 - 44 years                       26,235          12,772        13,463

 Northeast                           22,431          10,956        11,475
 North Central                       27,151          13,454        13,699
 South                               35,138          17,167        17,971
 West                                21,027          10,473        10,556

 White                               90,163          44,756        45,408
 Black                               12,790           5,949         6,840
 All other                            2,794           1,344         1,452

 45 - 64 years                       44,432          21,112        23,320

 45 - 54 years                       22,499          10,857        11,641
 55 - 64 years                       21,934          10,255        11,679

 Northeast                           10,422           4,901         5,521
 North Central                       11,304           5,417         5,887
 South                               14,591           6,864         7,727
 West                                 8,115           3,929         4,185

 White                               39,390          18,852        20,538
 Black                                4,208           1,874         2,334
 All other                              834             386           448

 65 years and over                   26,253          10,560        15,693

 65 - 74 years                       15,893           6,893         9,000
 75 years and over                   10,361           3,667         6,693

 Northeast                            6,195           2,411         3,784
 North Central                        6,840           2,738         4,102
 South                                8,759           3,552         5,207
 West                                 4,459           1,859         2,600

 White                               23,782           9,545        14,236
 Black                                2,148             863         1,284
 All other                              323             152           173

 *The NHDS used the civilian noninstitutionalized population to calculate
 hospital utilization rates from 1965 through 1980. Beginning in 1981, the
 civilian resident population is being used to calculate rates. If you have
 purchased NHDS tapes for years before 1981 and calculated rates using the
 civilian noninstitutionalized population provided in the documentation,
 these rates will have to be adjusted to be comparable to 1981 rates using
 the civilian resident population.

 Civ. Pop'n by Age, Sex, Geo. Region, & Race: U.S., 1982
 (Population estimates consistent with Series P-25, Current Population
 Reports, U.S. Bureau of the Census)

        Age, geographic           Both sexes         Male         Female
        region and race
        Population in thousands

        All ages                    229,865         110,974       118,891

 Northeast                           49,344          23,532        25,812
 North Central                       58,777          28,508        30,269
 South                               77,268          37,140        40,128
 West                                44,475          21,793        22,683

 White                              196,811          95,396       101,414
 Black                               27,279          12,771        14,509
 All other                            5,775           2,807         2,968

 0 - 14 years                        51,352          26,261        25,093

 Under 1 year                         3,642           1,864         1,778
 1 - 4 years                         13,730           7,023         6,708
 5 - 14 years                        33,980          17,375        16,607

 Northeast                           10,041           5,135         4,907
 North Central                       13,343           6,831         6,513
 South                               17,735           9,064         8,673
 West                                10,232           5,232         5,000

 White                               41,994          21,534        20,460
 Black                                7,754           3,908         3,846
 All other                            1,605             820           786

 15 - 44 years                      107,253          52,825        54,427

 15 - 24 years                       40,648          20,217        20,432
 25 - 34 years                       38,753          19,035        19,718
 35 - 44 years                       27,852          13,575        14,278

 Northeast                           22,678          11,084        11,594
 North Central                       27,273          13,523        13,750
 South                               35,843          17,524        18,320
 West                                21,457          10,694        10,763

 White                               91,215          45,300        45,917
 Black                               13,099           6,110         6,990
 All other                            2,937           1,415         1,520

 45 - 64 years                       44,435          21,109        23,326

 45 - 54 years                       22,342          10,789        11,553
 55 - 64 years                       22,093          10,320        11,773

 Northeast                           10,337           4,860         5,477
 North Central                       11,178           5,355         5,821
 South                               14,730           6,928         7,802
 West                                 8,191           3,965         4,226

 White                               39,308          18,818        20,492
 Black                                4,242           1,883         2,360
 All other                              885             410           474

 65 years and over                   26,824          10,778        16,046

 65 - 74 years                       16,134           7,004         9,131
 75 years and over                   10,689           3,774         6,914

 Northeast                            6,289           2,444         3,844
 North Central                        6,982           2,792         4,191
 South                                8,957           3,628         5,329
 West                                 4,596           1,914         2,682

 White                               24,293           9,747        14,547
 Black                                2,183             870         1,313
 All other                              348             161           186

 *The NHDS used the civilian noninstitutionalized population to calculate
 hospital utilization rates from 1965 through 1980. Beginning in 1981, the
 civilian resident population is being used to calculate rates. If you have
 purchased NHDS tapes for years before 1981 and calculated rates using the
 civilian noninstitutionalized population provided in the documentation,
 these rates will have to be adjusted to be comparable to 1982 rates using
 the civilian resident population.

Civ. Pop'n by Age, Sex, Geo. Region, & Race: U.S., 1983
 (Population estimates consistent with Series P-25, Current Population
 Reports, U.S. Bureau of the Census)

 Age, geographic region,
        and race              Both sexes         Male         Female

                                        Population in thousands

 All ages                      232,286          112,170      120,115

 Northeast                      49,407           23,549       25,857
 North Central                  58,808           28,520       30,288
 South                          78,647           37,819       40,828
 West                           45,424           22,282       23,142

 White                         198,199           96,089      102,111
 All other                      34,087           16,082       18,005

 0-14 years                     51,588           26,385       25,203

 Under 1 year                    3,660            1,875        1,785
 1-4 years                      14,166            7,246        6,920
 5-14 years                     33,762           17,264       16,498

 Northeast                       9,917            5,071        4,845
 North Central                  13,255            6,787        6,469
 South                          17,952            9,175        8,777
 West                           10,464            5,351        5,112

 White                          42,016           21,548       20,468
 All other                       9,573            4,838        4,737

 15-44 years                   108,792           53,638       55,153

 15-24 years                    40,031           19,934       20,097
 25-34 years                    39,574           19,470       20,104
 35-44 years                    29,187           14,234       14,952

 Northeast                      22,853           11,179       11,674
 North Central                  27,390           13,596       13,795
 South                          36,611           17,915       18,694
 West                           21,940           10,948       10,992

 White                          92,140           45,795       46,348
 All other                      16,652            7,845        8,808

 45-64 years                    44,521           21,155       23,367

 45-54 years                    22,303           10,778       11,526
 55-64 years                    22,218           10,377       11,841

 Northeast                      10,236            4,812        5,423
 North Central                  11,077            5,308        5,769
 South                          14,912            7,015        7,897
 West                            8,296            4,018        4,278

 White                          39,272           18,813       20,459
 All other                       5,250            2,343        2,908

 65 years and over              27,384           10,992       16,392

 65-74 years                    16,362            7,105        9,257
 75 years and over              11,021            3,887        7,135

 Northeast                       6,402            2,486        3,916
 North Central                   7,085            2,830        4,256
 South                           9,172            3,711        5,461
 West                            4,725            1,966        2,759

 White                          24,773            9,933       14,839
 All other                       2,612            1,058        1,555

 *The NHDS used the civilian noninstitutionalized population to calculate
 hospital utilization rates from 1965 through 1980. Beginning in 1981, the
 civilian resident population is being used to calculate rates. If you have
 purchased NHDS tapes for years before 1981 and calculated rates using the
 civilian noninstitutionalized population provided in the documentation,
 these rates will have to be adjusted to be comparable to 1983 rates using
 the civilian resident population.

Civ. Pop'n by Age, Sex, Geo. Region, & Race: U.S., 1984
 (Population estimates consistent with Series P-25, Current Population
 Reports, U.S. Bureau of the Census)

        Age, geographic          Both sexes         Male         Female
        region and race
                                           Population in thousands

        All ages                  234,443          113,199       121,244

 Northeast                         49,617           23,646        25,971
 North Central                     58,965           28,590        30,375
 South                             79,678           38,310        41,368
 West                              46,182           22,653        23,529

 White                            199,641           96,775       102,867
 All other                         34,801           16,424        18,377

 0 - 14 years                      51,733           26,475        25,259

 Under 1 year                       3,637            1,861         1,775
 1 - 4 years                       14,179            7,254         6,927
 5 - 14 years                      33,917           17,360        16,557

 Northeast                          9,850            5,041         4,809
 North Central                     13,188            6,757         6,431
 South                             18,055            9,234         8,822
 West                              10,640            5,444         5,196

 White                             42,045           21,572        20,473
 All other                          9,689            4,904         4,786

 15 - 44 years                    109,958           54,096        55,862

 15 - 24 years                     39,230           19,471        19,759
 25 - 34 years                     40,328           19,803        20,523
 35 - 44 years                     30,401           14,821        15,580

 Northeast                         23,047           11,248        11,798
 North Central                     27,511           13,625        13,885
 South                             37,140           18,136        19,005
 West                              22,262           11,087        11,175

 White                             92,995           46,132        46,863
 All other                         16,963            7,963         8,999

 45 - 64 years                     44,712           21,329        23,382

 45 - 54 years                     22,397           10,856        11,540
 55 - 64 years                     22,315           10,473        11,842

 Northeast                         10,205            4,818         5,388
 North Central                     11,044            5,314         5,730
 South                             15,069            7,118         7,951
 West                               8,392            4,081         4,313

 White                             39,280           18,880        20,403
 All other                          5,430            2,450         2,979

 65 years and over                 28,040           11,299        16,741

 65 - 74 years                     16,746            7,318         9,429
 75 years and over                 11,294            3,981         7,313

 Northeast                          6,515            2,539         3,976
 North Central                      7,223            2,895         4,327
 South                              9,414            3,823         5,591
 West                               4,888            2,041         2,846

 White                             25,321           10,193        15,129
 All other                          2,719            1,107         1,612

 *The NHDS used the civilian noninstitutionalized population to calculate
 hospital utilization rates from 1965 through 1980. Beginning in 1981, the
 civilian resident population is being used to calculate rates. If you have
 purchased NHDS tapes for years before 1981 and calculated rates using the
 civilian noninstitutionalized population provided in the documentation,
 these rates will have to be adjusted to be comparable to 1984 rates using
 the civilian resident population.

Civ. Pop'n by Age, Sex, Geo. Region, & Race: U.S., 1985
 (Population estimates consistent with Series P-25, Current Population
 Reports, U.S. Bureau of the Census)

        Regions and             Both sexes         Male        Female
        Divisions

        ALL AGES, U.S.            237,036         114,614       122,422

 NORTHEAST                         49,750          23,740        26,010
        NEW ENGLAND                12,613           6,034         6,579
        MIDDLE ATLANTIC            37,136          17,706        19,431
 NORTH CENTRAL                     59,044          28,667        30,377
        EAST NORTH CENTRAL         41,566          20,168        21,397
        WEST NORTH CENTRAL         17,478           8,498         8,980
 SOUTH                             80,976          38,984        41,991
        SOUTH ATLANTIC             39,669          18,959        20,710
        EAST SOUTH CENTRAL         15,019           7,222         7,797
        WEST SOUTH CENTRAL         26,288          12,804        13,484
 WEST                              47,267          23,223        24,044
        MOUNTAIN                   12,671           6,258         6,414
        PACIFIC                    34,595          16,965        17,630

 0 - 4
 U.S. total                        18,037           9,230         8,806
 NORTHEAST                          3,313           1,695         1,618
        NEW ENGLAND                   832             426           406
        MIDDLE ATLANTIC             2,481           1,269         1,212
 MIDWEST                            4,485           2,297         2,187
        EAST NORTH CENTRAL          3,097           1,586         1,511
        WEST NORTH CENTRAL          1,388             711           677
 SOUTH                              6,241           3,190         3,050
        SOUTH ATLANTIC              2,807           1,435         1,371
        EAST SOUTH CENT             1,112             568           544
        WEST SOUTH CENT             2,322           1,187         1,135
 WEST                               3,998           2,047         1,951
        MOUNTAIN                    1,152             590           562
        PACIFIC                     2,846           1,457         1,389

 5 - 14
 U.S. TOTAL                        33,924          17,371        16,554
 NORTHEAST                          6,510           3,333         3,177
        NEW ENGLAND                 1,614             828           787
        MIDDLE ATLANTIC             4,895           2,505         2,390
 MIDWEST                            8,705           4,463         4,243
        EAST NORTH CENTRAL          6,139           3,147         2,993
        WEST NORTH CENTRAL          2,566           1,316         1,250
 SOUTH                             11,884           6,082         5,802
        SOUTH ATLANTIC              5,430           2,778         2,652
        EAST SOUTH CENT             2,314           1,186         1,128
        WEST SOUTH CENT             4,140           2,118         2,022
 WEST                               6,825           3,493         3,332
        MOUNTAIN                    2,004           1,025           979
        PACIFIC                     4,822           2,469         2,353

 15 - 19
 U.S. TOTAL                        18,390           9,297         9,093
 NORTHEAST                          3,915           1,977         1,938
        NEW ENGLAND                 1,004             505           499
        MIDDLE ATLANTIC             2,911           1,471         1,439
 MIDWEST                            4,655           2,360         2,295
        EAST NORTH CENTRAL          3,328           1,687         1,641
        WEST NORTH CENTRAL          1,327             672           654
 SOUTH                              6,341           3,202         3,140
        SOUTH ATLANTIC              3,044           1,531         1,513
        EAST SOUTH CENT             1,219             619           600
        WEST SOUTH CENT             2,078           1,051         1,027
 WEST                               3,479           1,759         1,719
        MOUNTAIN                      962             485           477
        PACIFIC                     2,516           1,275         1,242

 20 - 24
 U.S. TOTAL                        20,359           9,946        10,413
 NORTHEAST                          4,264           2,073         2,191
        NEW ENGLAND                 1,125             547           578
        MIDDLE ATLANTIC             3,139           1,526         1,613
 MIDWEST                            5,132           2,528         2,604
        EAST NORTH CENTRAL          3,622           1,783         1,839
        WEST NORTH CENTRAL          1,511             745           766
 SOUTH                              7,010           3,391         3,619
        SOUTH ATLANTIC              3,372           1,614         1,758
        EAST SOUTH CENT             1,332             645           687
        WEST SOUTH CENT             2,306           1,132         1,174
 WEST                               3,953           1,953         1,999
        MOUNTAIN                    1,082             529           552
        PACIFIC                     2,871           1,424         1,447

 25 - 29
 U.S. TOTAL                        21,373          10,553         10,821
 NORTHEAST                          4,265           2,088          2,177
        NEW ENGLAND                 1,141             560            581
        MIDDLE ATLANTIC             3,124           1,528          1,596
 MIDWEST                            5,315           2,649          2,666
        EAST NORTH CENTRAL          3,753           1,866          1,887
        WEST NORTH CENTRAL          1,563             783            779
 SOUTH                              7,248           3,540          3,708
        SOUTH ATLANTIC              3,473           1,676          1,796
        EAST SOUTH CENT             1,315             642            673
        WEST SOUTH CENT             2,460           1,222          1,238
 WEST                               4,545           2,275          2,270
        MOUNTAIN                    1,212             609            603
        PACIFIC                     3,333           1,667          1,667

 30 - 34
 U.S. TOTAL                        20,033           9,885         10,148
 NORTHEAST                          4,004           1,953          2,051
        NEW ENGLAND                 1,040             512            529
        MIDDLE ATLANTIC             2,964           1,442          1,522
 MIDWEST                            4,878           2,424          2,453
        EAST NORTH CENTRAL          3,449           1,709          1,740
        WEST NORTH CENTRAL          1,428             715            713
 SOUTH                              6,726           3,290          3,435
        SOUTH ATLANTIC              3,253           1,577          1,676
        EAST SOUTH CENT             1,197             587            610
        WEST SOUTH CENT             2,275           1,127          1,149
 WEST                               4,425           2,217          2,208
        MOUNTAIN                    1,155             584            571
        PACIFIC                     3,271           1,633          1,638

 35 - 44
 U.S. TOTAL                        31,502          15,379         16,123
 NORTHEAST                          6,681           3,223          3,459
        NEW ENGLAND                 1,720             840            880
        MIDDLE ATLANTIC             4,962           2,383          2,579
 MIDWEST                            7,532           3,696          3,835
        EAST NORTH CENTRAL          5,363           2,627          2,736
        WEST NORTH CENTRAL          2,168           1,069          1,099
 SOUTH                             10,684           5,179          5,505
        SOUTH ATLANTIC              5,341           2,578          2,763
        EAST SOUTH CENT             1,925             930            995
        WEST SOUTH CENT             3,417           1,670          1,747
 WEST                               6,605           3,281          3,324
        MOUNTAIN                    1,693             841            852
        PACIFIC                     4,913           2,440          2,472

 45 - 54
 U.S. TOTAL                        22,555          10,927         11,628
 NORTHEAST                          4,966           2,380          2,586
        NEW ENGLAND                 1,203             583            620
        MIDDLE ATLANTIC             3,763           1,797          1,966
 MIDWEST                            5,524           2,696          2,828
        EAST NORTH CENTRAL          3,930           1,915          2,015
        WEST NORTH CENTRAL          1,594             781            813
 SOUTH                              7,732           3,715          4,017
        SOUTH ATLANTIC              3,913           1,877          2,036
        EAST SOUTH CENT             1,434             683            751
        WEST SOUTH CENT             2,384           1,155          1,230
 WEST                               4,333           2,136          2,197
        MOUNTAIN                    1,109             549            560
        PACIFIC                     3,225           1,588          1,637

 55 - 59
 U.S. TOTAL                        11,336           5,378          5,957
 NORTHEAST                          2,668           1,257          1,411
        NEW ENGLAND                   638             303            335
        MIDDLE ATLANTIC             2,030             954          1,076
 MIDWEST                            2,821           1,356          1,465
        EAST NORTH CENTRAL          2,016             966          1,050
        WEST NORTH CENTRAL            804             389            415
 SOUTH                              3,789           1,775          2,014
        SOUTH ATLANTIC              1,965             914          1,051
        EAST SOUTH CENT               694             324            370
        WEST SOUTH CENT             1,129             537            592
 WEST                               2,058             991          1,068
        MOUNTAIN                      514             248            266
        PACIFIC                     1,544             743            801

 60 - 64
 U.S. TOTAL                        10,997           5,120          5,877
 NORTHEAST                          2,590           1,193          1,397
        NEW ENGLAND                   627             290            337
        MIDDLE ATLANTIC             1,963             903          9,060
 MIDWEST                            2,701           1,265          1,436
        EAST NORTH CENTRAL          1,920             898          1,022
        WEST NORTH CENTRAL            780             366            414
 SOUTH                              3,690           1,698          1,991
        SOUTH ATLANTIC              1,976             903          1,073
        EAST SOUTH CENT               659             302            357
        WEST SOUTH CENT             1,054             493            561
 WEST                               2,016             963          1,053
        MOUNTAIN                      501             241            260
        PACIFIC                     1,515             723            792

 65+
 U.S. TOTAL                        28,530          11,529         17,002
 NORTHEAST                          6,573           2,569          4,005
        NEW ENGLAND                 1,668             640          1,028
        MIDDLE ATLANTIC             4,905           1,928          2,977
 MIDWEST                            7,297           2,933          4,364
        EAST NORTH CENTRAL          4,948           1,982          2,965
        WEST NORTH CENTRAL          2,349             950          1,399
 SOUTH                              9,632           3,922          5,710
        SOUTH ATLANTIC              5,094           2,076          3,018
        EAST SOUTH CENT             1,816             734          1,083
        WEST SOUTH CENT             2,722           1,112          1,609
 WEST                               5,028           2,105          2,923
        MOUNTAIN                    1,288             558            730
        PACIFIC                     3,740           1,547          2,193

 UNDER 17, U.S.                    59,411          30,410         29,001
 NORTHEAST                         11,377           5,822          5,555
        NEW ENGLAND                 2,843           1,456          1,387
        MIDDLE ATLANTIC             8,535           4,366          4,169
 MIDWEST                           15,086           7,732          7,354
        EAST NORTH CENTRAL         10,590           5,426          5,164
        WEST NORTH CENTRAL          4,495           2,305          2,190
 SOUTH                             20,697          10,587         10,110
        SOUTH ATLANTIC              9,460           4,838          4,622
        EAST SOUTH CENT             3,922           2,008          1,914
        WEST SOUTH CENT             7,316           3,741          3,575
 WEST                              12,250           6,269          5,981
        MOUNTAIN                    3,551           1,816          1,735
        PACIFIC                     8,699           4,453          4,245

 *The NHDS used the civilian noninstitutionalized population to calculate
 hospital utilization rates from 1965 through 1980. Beginning in 1981, the
 civilian resident population is being used to calculate rates. If you have
 purchased NHDS tapes for years before 1981 and calculated rates using the
 civilian noninstitutionalized population provided in the documentation,
 these rates will have to be adjusted to be comparable to 1985 rates using
 the civilian resident population.

Civ. Pop'n by Age, Sex, Geo. Region, & Race: U.S., 1986
 (Population estimates consistent with Series P-25, Current Population
 Reports, U.S. Bureau of the Census)

                                         (NUMBERS IN THOUSANDS)
 TOTAL
 DATE AND AGE                       TOTAL           MALE           FEMALE

 JULY 1, 1986

 ALL AGES                         239,357         115,800         123,556

 UNDER 5 YEARS                     18,128           9,274           8,854
        UNDER 1 YEAR                3,728           1,908           1,819
        1 YEAR                      3,623           1,856           1,767
        2 YEARS                     3,497           1,788           1,709
        3 YEARS                     3,625           1,855           1,771
        4 YEARS                     3,654           1,867           1,787
 5 TO 9 YEARS                      17,291           8,851           8,440
        5 YEARS                     3,601           1,844           1,758
        6 YEARS                     3,555           1,818           1,738
        7 YEARS                     3,496           1,789           1,707
        8 YEARS                     3,283           1,682           1,601
        9 YEARS                     3,355           1,719           1,636

 10 TO 14 YEARS                    16,564           8,487           8,077
        10 YEARS                    3,267           1,675           1,592
        11 YEARS                    3,285           1,684           1,600
        12 YEARS                    3,202           1,641           1,561
        13 YEARS                    3,302           1,690           1,612
        14 YEARS                    3,508           1,797           1,711
 15 TO 19 YEARS                    18,456           9,343           9,114
        15 YEARS                    3,846           1,971           1,875
        16 YEARS                    3,767           1,928           1,840
        17 YEARS                    3,670           1,878           1,791
        18 YEARS                    3,512           1,766           1,745
        19 YEARS                    3,662           1,800           1,862

 20 TO 24 YEARS                    19,803           9,681          10,121
        20 YEARS                    3,705           1,809           1,896
        21 YEARS                    3,834           1,866           1,968
        22 YEARS                    3,983           1,947           2,036
        23 YEARS                    4,071           1,990           2,081
        24 YEARS                    4,209           2,069           2,140
 25 TO 29 YEARS                    21,620          10,682          10,938
        25 YEARS                    4,341           2,137           2,204
        26 YEARS                    4,260           2,101           2,159
        27 YEARS                    4,334           2,139           2,196
        28 YEARS                    4,186           2,070           2,116
        29 YEARS                    4,499           2,235           2,264

 30 TO 34 YEARS                    20,528          10,146          10,382
        30 YEARS                    4,321           2,140           2,181
        31 YEARS                    4,167           2,060           2,107
        32 YEARS                    4,113           2,031           2,082
        33 YEARS                    3,959           1,951           2,008
        34 YEARS                    3,969           1,964           2,004
 35 TO 39 YEARS                    18,535           9,078           9,457
        35 YEARS                    3,818           1,879           1,939
        36 YEARS                    3,627           1,778           1,849
        37 YEARS                    3,629           1,771           1,858
        38 YEARS                    3,518           1,716           1,802
        39 YEARS                    3,944           1,934           2,010

 40 TO 44 YEARS                    14,258           6,944           7,313
        40 YEARS                    2,877           1,398           1,478
        41 YEARS                    2,813           1,371           1,442
        42 YEARS                    2,846           1,388           1,458
        43 YEARS                    3,030           1,477           1,553
        44 YEARS                    2,692           1,310           1,382
 45 TO 49 YEARS                    11,895           5,786           6,110
        45 YEARS                    2,482           1,206           1,276
        46 YEARS                    2,429           1,178           1,251
        47 YEARS                    2,444           1,187           1,257
        48 YEARS                    2,279           1,112           1,166
        49 YEARS                    2,262           1,102           1,160

 50 TO 54 YEARS                    10,879           5,252           5,627
        50 YEARS                    2,250           1,083           1,167
        51 YEARS                    2,183           1,059           1,124
        52 YEARS                    2,106           1,019           1,087
        53 YEARS                    2,126           1,029           1,097
        54 YEARS                    2,214           1,062           1,152
 55 TO 59 YEARS                    11,266           5,357           5,909
        55 YEARS                    2,230           1,064           1,166
        56 YEARS                    2,236           1,074           1,161
        57 YEARS                    2,291           1,094           1,197
        58 YEARS                    2,257           1,071           1,186
        59 YEARS                    2,252           1,054           1,198

 60 TO 64 YEARS                    10,961           5,096           5,865
        60 YEARS                    2,245           1,047           1,198
        61 YEARS                    2,261           1,054           1,207
        62 YEARS                    2,154           1,000           1,154
        63 YEARS                    2,105             978           1,127
        64 YEARS                    2,196           1,018           1,179
 65 TO 69 YEARS                     9,661           4,377           5,285
        65 YEARS                    2,146             992           1,154
        66 YEARS                    1,978             906           1,073
        67 YEARS                    1,898             859           1,040
        68 YEARS                    1,856             836           1,020
        69 YEARS                    1,782             784             998

 70 TO 74 YEARS                     7,664           3,268           4,396
        70 YEARS                    1,660             728             932
        71 YEARS                    1,605             693             911
        72 YEARS                    1,553             663             890
        73 YEARS                    1,447             607             841
        74 YEARS                    1,399             576             822
 75 TO 79 YEARS                     5,629           2,197           3,432
        75 YEARS                    1,301             529             772
        76 YEARS                    1,213             481             732
        77 YEARS                    1,126             436             690
        78 YEARS                    1,038             395             643
        79 YEARS                      951             357             594

 80 TO 84 YEARS                     3,422           1,189           2,233
        80 YEARS                      849             308             541
        81 YEARS                      749             263             486
        82 YEARS                      659             229             430
        83 YEARS                      612             207             405
        84 YEARS                      553             182             372
 85 YEARS AND OVER                  2,796             792           2,004

 1 TO 4 YEARS                      14,400           7,366           7,035
 5 TO 13 YEARS                     30,346          15,541          14,805
 14 TO 17 YEARS                    14,792           7,574           7,217
 18 TO 24 YEARS                    26,976          13,247          13,729
        18 TO 21 YEARS             14,712           7,240           7,472
        22 TO 24 YEARS             12,264           6,007           6,257
 15 TO 44 YEARS                   113,200          55,874          57,326

 14 YEARS AND OVER                190,882          90,986          99,897
 16 YEARS AND OVER                183,528          87,217          96,310
 18 YEARS AND OVER                176,091          83,411          92,680
 21 YEARS AND OVER                165,212          78,037          87,176
 62 YEARS AND OVER                 35,628          14,818          20,810
 65 YEARS AND OVER                 29,173          11,823          17,350

 MEDIAN AGE     YEARS                31.9            30.8            33.0


 July 1, 1986 Male 80-Based Estimates of Civ. Pop'n by Age

                                             (IN THOUSANDS)

                       TOTAL     0-4     5-14     15-19    20-24     25-29

 NORTHEAST             23835     715     3279      1950     2023      2115
 MIDWEST               28721    2250     4372      2351     2445      2682
 SOUTH                 39534    3229     6129      3253     3304      3591
 WEST                  23711    2079     3557      1789     1909      2294
 NEW ENGLAND            6081     434      815       498      532       572
 MIDDLE ATLANTIC       17754    1281     2465      1451     1491      1542
 EAST NORTH CENTRAL    20215    1567     3094      1684     1728      1882
 WEST NORTH CENTRAL     8506     683     1278       667      717       800
 SOUTH ATLANTIC        19292    1472     2804      1558     1582      1704
 EAST SOUTH CENTRAL     7258     564     1185       626      624       651
 WEST SOUTH CENTRAL    12983    1193     2140      1069     1097      1237
 MOUNTAIN               6374     587     1035       496      516       616
 PACIFIC               17337    1493     2522      1293     1393      1678


                       30-34    35-44    45-54    55-59    60-64     65+

 NORTHEAST              1986     3330     2381     1241    1179     2636
 MIDWEST                2486     3849     2716     1346    1258     2965
 SOUTH                  3382     5385     3762     1773    1698     4027
 WEST                   2291     3459     2180      997     961     2195
 NEW ENGLAND             523      874      585      300     286      661
 MIDDLE ATLANTIC        1463     2456     1796      941     893     1974
 EAST NORTH CENTRAL     1749     2727     1924      957     892     2011
 WEST NORTH CENTRAL      738     1122      792      390     366      954
 SOUTH ATLANTIC         1618     2681     1906      915     904     2149
 EAST SOUTH CENTRAL      600      960      687      322     300      740
 WEST SOUTH CENTRAL     1165     1744     1168      537     494     1139
 MOUNTAIN                603      888      560      252     241      580
 PACIFIC                1688     2570     1620      745     720     1616


                          0-16

 NORTHEAST                5792
 MIDWEST                  7606
 SOUTH                   10727
 WEST                     6385
 NEW ENGLAND              1451
 MIDDLE ATLANTIC          4341
 EAST NORTH CENTRAL       5368
 WEST NORTH CENTRAL       2237
 SOUTH ATLANTIC           4929
 EAST SOUTH CENTRAL       2013
 WEST SOUTH CENTRAL       3785
 MOUNTAIN                 1830
 PACIFIC                  4555


 July 1, 1986 Female 80-Based Estimates of Civ. Pop'n by Age

                                             (IN THOUSANDS)

                        TOTAL     0-4     5-14     15-19     20-24     25-29

 NORTHEAST              26072    1638     3124      1908      2135      2203
 MIDWEST                30444    2144     4156      2280      2514      2695
 SOUTH                  42558    3089     5845      3181      3520      3755
 WEST                   24482    1983     3392      1744      1952      2285
 NEW ENGLAND             6606     414      773       491       561       594
 MIDDLE ATLANTIC        19466    1224     2350      1417      1575      1609
 EAST NORTH CENTRAL     21448    1494     2941      1634      1779      1900
 WEST NORTH CENTRAL      8996     650     1215       647       735       795
 SOUTH ATLANTIC         21044    1408     2676      1535      1720      1822
 EAST SOUTH CENTRAL      7850     540     1126       605       664       682
 WEST SOUTH CENTRAL      1366    4114     2204      3104      1113     61250
 MOUNTAIN                6530     560      989       487       538       610
 PACIFIC                17953    1423     2403      1257      1414      1675


                        30-34    35-44    45-54   55-59    60-64     65+

 NORTHEAST              2078      3568     2585    1387     1384     4062
 MIDWEST                2509      3987     2848    1449     1432     4429
 SOUTH                  3519      5716     4064    2004     1995     5869
 WEST                   2276      3500     2238    1069     1053     2990
 NEW ENGLAND             539       913      622     331      333     1036
 MIDDLE ATLANTIC        1539      2654     1964    1056     1052     3026
 EAST NORTH CENTRAL     1775      2835     2024    1036     1018     3015
 WEST NORTH CENTRAL      734      1152      825     414      414     1415
 SOUTH ATLANTIC         1713      2870     2067    1049     1078     3106
 EAST SOUTH CENTRAL      622      1026      755     366      355     1109
 WEST SOUTH CENTRAL     1184      1821     1243     589      563     1653
 MOUNTAIN                588       899      572     270      262      755
 PACIFIC                1688      2600     1667     799      791     2235


                        0-16

 NORTHEAST              5524
 MIDWEST                7232
 SOUTH                 10240
 WEST                   6090
 NEW ENGLAND            1381
 MIDDLE ATLANTIC        4143
 EAST NORTH CENTRAL     5107
 WEST NORTH CENTRAL     2125
 SOUTH ATLANTIC         4706
 EAST SOUTH CENTRAL     1918
 WEST SOUTH CENTRAL     3616
 MOUNTAIN               1748
 PACIFIC                4342


 July 1, 1986 Both Sexes 80-Based Estimates of Civ. Pop'n by Age

                                              (IN THOUSANDS)

                        TOTAL     0-4     5-14     15-19     20-24     25-29

 NORTHEAST              49907    3353     6403      3858      4159      4318
 MIDWEST                59165    4394     8528      4631      4959      5377
 SOUTH                  82091    6318    11975      6434      6824      7347
 WEST                   48193    4063     6949      3533      3861      4579
 NEW ENGLAND            12687     848     1588       989      1093      1166
 MIDDLE ATLANTIC        37220    2505     4815      2869      3066      3152
 EAST NORTH CENTRAL     41663    3061     6035      3318      3507      3782
 WEST NORTH CENTRAL     17502    1334     2493      1314      1452      1595
 SOUTH ATLANTIC         40336    2880     5481      3093      3302      3526
 EAST SOUTH CENTRAL     15108    1104     2311      1231      1288      1333
 WEST SOUTH CENTRAL     26647    2335     4183      2111      2234      2487
 MOUNTAIN               12903    1147     2024       983      1054      1226
 PACIFIC                35290    2916     4925      2550      2807      3353


                        30-34    35-44    45-54    55-59    60-64     65+

 NORTHEAST              4064      6898     4966    2627     2564     6698
 MIDWEST                4995      7836     5564    2796     2691     7394
 SOUTH                  6902     11101     7826    3777     3693     9895
 WEST                   4567      6958     4418    2065     2014     5185
 NEW ENGLAND            1062      1787     1207     630      619     1697
 MIDDLE ATLANTIC        3002      5110     3759    1997     1945     5000
 EAST NORTH CENTRAL     3523      5562     3948    1992     1910     5026
 WEST NORTH CENTRAL     1472      2274     1617     804      780     2368
 SOUTH ATLANTIC         3331      5551     3972    1964     1981     5254
 EAST SOUTH CENTRAL     1222      1986     1442     688      655     1849
 WEST SOUTH CENTRAL     2348      3564     2411    1125     1057     2792
 MOUNTAIN               1191      1788     1131     521      503     1334
 PACIFIC                3376      5171     3287    1544     1510     3851


                         0-16

 NORTHEAST              11316
 MIDWEST                14838
 SOUTH                  20968
 WEST                   12475
 NEW ENGLAND             2833
 MIDDLE ATLANTIC         8484
 EAST NORTH CENTRAL     10475
 WEST NORTH CENTRAL      4363
 SOUTH ATLANTIC          9635
 EAST SOUTH CENTRAL      3931
 WEST SOUTH CENTRAL      7401
 MOUNTAIN                3578
 PACIFIC                 8897

Civ. Pop'n by Age, Sex, Geo. Region, & Race: U.S., 1987
 (Population estimates consistent with Series P-25, Current Population
 Reports, U.S. Bureau of the Census)

                                 (NUMBERS IN THOUSANDS)
 TOTAL
 DATE AND AGE                TOTAL         MALE          FEMALE

 JULY 1, 1986

 ALL AGES                   241,661       116,959        124,702

 UNDER 5 YEARS               18,252         9,341          8,910
        UNDER 1 YEAR          3,771         1,931          1,841
        1 YEAR                3,642         1,866          1,776
        2 YEARS               3,611         1,847          1,764
        3 YEARS               3,580         1,820          1,740
        4 YEARS               3,668         1,878          1,790
 5 TO 9 YEARS                17,661         9,037          8,625
        5 YEARS               3,651         1,866          1,785
        6 YEARS               3,612         1,848          1,764
        7 YEARS               3,625         1,855          1,770
        8 YEARS               3,389         1,736          1,654
        9 YEARS               3,364         1,732          1,652

 10 TO 14 YEARS              16,485         8,450          8,035
        10 YEARS              3,420         1,755          1,665
        11 YEARS              3,236         1,657          1,578
        12 YEARS              3,280         1,682          1,598
        13 YEARS              3,226         1,653          1,573
        14 YEARS              3,323         1,702          1,620
 15 TO 19 YEARS              18,309         9,275          9,034
        15 YEARS              3,539         1,812          1,728
        16 YEARS              3,845         1,970          1,875
        17 YEARS              3,756         1,927          1,830
        18 YEARS              3,583         1,804          1,780
        19 YEARS              3,586         1,764          1,822

 20 TO 24 YEARS              19,182         9,368          9,814
        20 YEARS              3,604         1,757          1,847
        21 YEARS              3,624         1,764          1,859
        22 YEARS              3,816         1,859          1,957
        23 YEARS              4,006         1,958          2,047
        24 YEARS              4,133         2,029          2,104
 25 TO 29 YEARS              21,574        10,651         10,923
        25 YEARS              4,247         2,089          2,159
        26 YEARS              4,321         2,130          2,192
        27 YEARS              4,315         2,126          2,186
        28 YEARS              4,178         2,062          2,116
        29 YEARS              4,513         2,242          2,270

 30 TO 34 YEARS              21,081        10,433         10,647
        30 YEARS              4,483         2,225          2,258
        31 YEARS              4,234         2,093          2,140
        32 YEARS              4,208         2,083          2,124
        33 YEARS              4,072         2,009          2,063
        34 YEARS              4,084         2,023          2,061
 35 TO 39 YEARS              18,553         9,099          9,454
        35 YEARS              3,918         1,934          1,964
        36 YEARS              3,768         1,849          1,919
        37 YEARS              3,643         1,783          1,860
        38 YEARS              3,548         1,732          1,816
        39 YEARS              3,676         1,801          1,875

 40 TO 44 YEARS              15,471         7,546          7,925
        40 YEARS              3,958         1,937          2,021
        41 YEARS              2,767         1,346          1,421
        42 YEARS              2,824         1,377          1,447
        43 YEARS              2,872         1,397          1,475
        44 YEARS              3,050         1,489          1,561
 45 TO 49 YEARS              12,321         5,996          6,325
        45 YEARS              2,639         1,285          1,355
        46 YEARS              2,538         1,231          1,306
        47 YEARS              2,468         1,199          1,269
        48 YEARS              2,309         1,127          1,182
        49 YEARS              2,368         1,155          1,213

 50 TO 54 YEARS              10,919         5,279          5,641
        50 YEARS              2,270         1,094          1,176
        51 YEARS              2,186         1,059          1,127
        52 YEARS              2,184         1,058          1,126
        53 YEARS              2,127         1,033          1,094
        54 YEARS              2,152         1,035          1,117
 55 TO 59 YEARS              11,120         5,297          5,823
        55 YEARS              2,160         1,032          1,128
        56 YEARS              2,205         1,053          1,152
        57 YEARS              2,277         1,093          1,185
        58 YEARS              2,204         1,048          1,156
        59 YEARS              2,274         1,072          1,202

 60 TO 64 YEARS              10,898         5,067          5,831
        60 YEARS              2,257         1,057          1,201
        61 YEARS              2,198         1,024          1,174
        62 YEARS              2,159         1,002          1,157
        63 YEARS              2,156         1,003          1,153
        64 YEARS              2,127           961          1,146
 65 TO 69 YEARS               9,889         4,495          5,394
        65 YEARS              2,190         1,011          1,179
        66 YEARS              2,070           953          1,118
        67 YEARS              1,953           889          1,064
        68 YEARS              1,842           829          1,013
        69 YEARS              1,834           814          1,020

 70 TO 74 YEARS               7,779         3,329          4,450
        70 YEARS              1,706           750            956
        71 YEARS              1,612           700            912
        72 YEARS              1,567           672            895
        73 YEARS              1,468           617            851
        74 YEARS              1,426           590            836
 75 TO 79 YEARS               5,777         2,264          3,513
        75 YEARS              1,332           544            789
        76 YEARS              1,244           495            749
        77 YEARS              1,156           450            706
        78 YEARS              1,067           407            660
        79 YEARS                978           368            610

 80 TO 84 YEARS               3,524         1,225          2,298
        80 YEARS                874           318            556
        81 YEARS                772           272            500
        82 YEARS                680           237            443
        83 YEARS                630           213            417
        84 YEARS                568           186            382
 85 YEARS AND OVER            2,867           806          2,061

 1 TO 4 YEARS                14,481         7,411          7,070
 5 TO 13 YEARS               30,823        15,784         15,039
 14 TO 17 YEARS              14,463         7,410          7,053
 18 TO 24 YEARS              26,351        12,935         13,416
        18 TO 21 YEARS       14,397         7,089          7,308
        22 TO 24 YEARS       11,954         5,846          6,108
 15 TO 44 YEARS             114,171        56,373         57,798

 14 YEARS AND OVER          192,586        91,833        100,753
 16 YEARS AND OVER          185,724        88,319         97,405
 18 YEARS AND OVER          178,123        84,423         93,700
 21 YEARS AND OVER          167,350        79,098         88,252
 62 YEARS AND OVER           36,278        15,106         21,172
 65 YEARS AND OVER           29,835        12,119         17,716

 MEDIAN AGE     YEARS          32.2          31.1           33.3


 July 1, 1987 Both Sexes 80-Based Estimates of Civ. Pop'n by Age

                                          (IN THOUSANDS)

                        TOTAL     0-4      5-14   15-19     20-24     25-29

 UNITED STATES         241660    11825    23414   61830     91918    221574

        NORTHEAST       50161     3410     6408    3759      4038      4330
 NEW ENGLAND            12795      866     1591     965      1062      1175
 MIDDLE ATLANTIC        37366     2543     4817    2794      2976      3155
        MIDWEST         59393     4361     8531    4573      4765      5349
 EAST NORTH CENTRAL     41833     3047     6022    3276      3386      3761
 WEST NORTH CENTRAL     17560     1314     2509    1297      1379      1588
        SOUTH           82978     6356    12067    6439      6608      7337
 SOUTH ATLANTIC         41097     2947     5538    3106      3229      3557
 EAST SOUTH CENTRAL     15189     1092     2302    1232      1240      1337
 WEST SOUTH CENTRAL     26692     2318     4227    2101      2130      2443
        WEST            49128     4124     7140    3539      3771      4559
 MOUNTAIN               13047     1142     2058     982      1017      1210
 PACIFIC                36081     2983     5082    2557      2754      3349


                        30-34    35-44    45-54   55-59     60-64     65-74

 UNITED STATES          21081    34024    23240   11120     10898     17667

        NORTHEAST        4158     7105     5050    2569      2548      4003
 NEW ENGLAND             1093     1852     1235     620       616       997
 MIDDLE ATLANTIC         3065     5243     3815    1949      1932      3007
        MIDWEST          5116     8113     5661    2742      2669      4342
 EAST NORTH CENTRAL      3611     5750     4022    1950      1896      3024
 W22EST NORTH CENTRAL    1505     2363     1639     792       772      1318
        SOUTH            7093    11507     7979    3748      3681      6073
 SOUTH ATLANTIC          3449     5793     4097    1970      1996      3278
 EAST SOUTH CENTRAL      1254     2054     1465     680       651      1106
 WEST SOUTH CENTRAL      2390     3660     2418    1099      1033      1689
        WEST             4715     7300     4550    2061      2000      3248
 MOUNTAIN                1217     1863     1152     519       497       853
 PACIFIC                 3497     5437     3398    1542      1503      2395


                        75-84     85+       <1      0-16       65+

 UNITED STATES           9301     2867     3771   59781     29835

        NORTHEAST        2115      668      716   11300      6787
 NEW ENGLAND              539      183      182    2834      1719
 MIDDLE ATLANTIC         1576      485      534    8465      5068
        MIDWEST          2382      792      891   14739      7516
 EAST NORTH CENTRAL      1582      506      625   10402      5113
 WEST NORTH CENTRAL       799      286      266    4337      2403
        SOUTH            3182      908     1304   21059     10163
 SOUTH ATLANTIC          1665      464      613    9742      5408
 EAST SOUTH CENTRAL       602      174      220    3904      1882
 WEST SOUTH CENTRAL       915      270      471    7413      2874
        WEST             1622      499      860   12683      5369
 MOUNTAIN                 418      118      234    3597      1389
 PACIFIC                 1203      382      626    9086      3980


 July 1, 1987 Male 80-Based Estimates of Civ. Pop'n by Age

                                          (IN THOUSANDS)

                        TOTAL     0-4     5-14     15-19     20-24     25-29

 UNITED STATES         116959    9341    17486      9275      9368     10651

        NORTHEAST       23965    1745     3282      1901      1962      2119
 NEW ENGLAND             6138     444      816       487       517       577
 MIDDLE ATLANTIC        17827    1302     2466      1414      1446      1543
        MIDWEST         28841    2234     4373      2323      2347      2666
 EAST NORTH CENTRAL     20303    1561     3087      1664      1667      1870
 WEST NORTH CENTRAL      8538     674     1286       659       680       796
        SOUTH           39968    3250     6176      3258      3196      3584
 SOUTH ATLANTIC         19666    1507     2834      1565      1550      1717
 EAST SOUTH CENTRAL      7298     558     1180       627       600       652
 WEST SOUTH CENTRAL     13005    1185     2162      1065      1045      1214
        WEST            24184    2112     3655      1793      1863      2283
 MOUNTAIN                6446     584     1053       496       498       608
 PACIFIC                17738    1527     2602      1297      1365      1751


                        30-34   35-44    45-54     55-59     60-64     65-74

 UNITED STATES          10433   16645    11275      5297      5067      7824

        NORTHEAST        2034    3434     2424      1215      1173      1736
 NEW ENGLAND              539     907      600       295       285       435
 MIDDLE ATLANTIC         1495    2527     1824       920       888      1301
        MIDWEST          2550    3990     2765      1323      1248      1919
 EAST NORTH CENTRAL      1795    2823     1962       938       886      1330
 WEST NORTH CENTRAL       755    1167      804       385       362       589
        SOUTH            3481    5589     3839      1763      1692      2677
 SOUTH ATLANTIC          1677    2802     1968       919       911      1447
 EAST SOUTH CENTRAL       617     994      699       319       298       480
 WEST SOUTH CENTRAL      1187    1793     1173       525       483       750
        WEST             2368    3633     2247       996       954      1491
 MOUNTAIN                 617     927      570       251       238       398
 PACIFIC                 1751    2706     1677       745       716      1094


                        75-84     85+      <1       0-16       65+

 UNITED STATES           3489     806     1931     30609     12119

        NORTHEAST         762     178      367      5785      2675
 NEW ENGLAND              192      46       93      1452       673
 MIDDLE ATLANTIC          570     132      273      4332      2002
        MIDWEST           883     219      457      7556      3021
 EAST NORTH CENTRAL       582     138      320      5332      2051
 WEST NORTH CENTRAL       301      81      136      2225       971
        SOUTH            1201     263      666     10776      4141
 SOUTH ATLANTIC           634     135      314      4984      2216
 EAST SOUTH CENTRAL       223      50      112      2000       753
 WEST SOUTH CENTRAL       344      78      240      3792      1172
        WEST              644     146      441      6493      2281
 MOUNTAIN                 171      36      120      1840       605
 PACIFIC                  473     110      321      4653      1677


 July 1, 1987 Female 80-Based Estimates of Civ. Pop'n by Age

                                              (IN THOUSANDS)

                        TOTAL     0-4     5-14     15-19     20-24     25-29

 UNITED STATES         124702    8910    16659      9034      9814     10923

        NORTHEAST       26196    1665     3126      1858      2075      2210
 NEW ENGLAND             6657     423      775       479       546       599
 MIDDLE ATLANTIC        19539    1242     2351      1379      1530      1612
        MIDWEST         30553    2127     4157      2250      2418      2683
 EAST NORTH CENTRAL     21530    1486     2935      1612      1719      1891
 WEST NORTH CENTRAL      9022     640     1222       638       699       792
        SOUTH           43010    3106     5891      3181      3412      3753
 SOUTH ATLANTIC         21432    1440     2704      1540      1688      1839
 EAST SOUTH CENTRAL      7891     534     1122       605       640       685
 WEST SOUTH CENTRAL     13687    1133     2064      1035      1084      1229
        WEST            24944    2012     3485      1746      1908      2277
 MOUNTAIN                6601     557     1006       486       520       603
 PACIFIC                18343    1455     2480      1260      1388      1674


                        30-34   35-44    45-54     55-59     60-64     65-74

 UNITED STATES          10647   17379    11965      5823      5831      9844

        NORTHEAST        2123    3671     2627      1354      1376      2268
 NEW ENGLAND              554     945      636       324       331       562
 MIDDLE ATLANTIC         1569    2725     1991      1029      1045      1706
        MIDWEST          2566    4123     2895      1419      1420      2423
 EAST NORTH CENTRAL      1816    2928     2060      1012      1010      1694
 WEST NORTH CENTRAL       749    1195      836       407       410       729
        SOUTH            3612    5918     4140      1986      1989      3396
 SOUTH ATLANTIC          1771    2992     2129      1051      1086      1831
 EAST SOUTH CENTRAL       638    1059      766       361       353       627
 WEST SOUTH CENTRAL      1203    1867     1245       574       550       939
        WEST             2346    3667     2303      1065      1046      1757
 MOUNTAIN                 600     936      582       268       259       455
 PACIFIC                 1746    2731     1722       797       787      1302


                        75-84     85+      <1       0-16       65+

 UNITED STATES           5812    2061     1841     29172     17716

        NORTHEAST        1354     490      349      5515      4111
 NEW ENGLAND              347     137       88      1382      1046
 MIDDLE ATLANTIC         1006     353      261      4133      3065
        MIDWEST          1499     573      435      7183      4494
 EAST NORTH CENTRAL      1000     368      305      5071      3062
 WEST NORTH CENTRAL       499     205      130      2113      1432
        SOUTH            1981     645      637     10284      6023
 SOUTH ATLANTIC          1032     329      299      4758      3191
 EAST SOUTH CENTRAL       378     124      108      1905      1129
 WEST SOUTH CENTRAL       571     192      231      3621      1702
        WEST              978     353      419      6190      3088
 MOUNTAIN                 248      82      114      1757       785
 PACIFIC                  730     272      305      4433      2303

 *The NHDS used the civilian noninstitutionalized population to calculate
 hospital utilization rates from l965 through l980.  Beginning in l98l, the
 civilian resident population has been used to calculate rates.  If you
 have purchased NHDS tapes for years before l98l and calculated rates using
 the civilian noninstitutionalized population provided in the docu-
 mentation, these rates will have to be adjusted to be comparable to l985
 rates using the civilian resident population.
DISCHARGE POPULATIONS

1985
                    DISCHARGE POPULATION FOR NHDS - 1985
                                     RACE
     AGE       White     Black    Natv   Asian     Other   Unknown      TOTAL
    GROUPS                        Amer
  MALES
     Nwbn  1,328,409   283,574   7,393  24,656    56,822   252,575  1,953,429
     < 1     298,253    82,862   3,612   3,657    11,979    48,396    448,759
     1- 4    373,007    96,937   3,630   5,431    11,846    50,417    541,268
     5-14    511,983   102,545   1,902   6,678    12,437    72,443    707,988
    15-24    840,565   140,366   6,489   9,178    25,687   130,978  1,153,263
    25-34  1,069,152   225,067   5,096  16,208    37,987   168,820  1,522,330
    35-44  1,060,692   199,328   7,015  18,371    33,483   158,881  1,477,770
    45-54  1,190,806   199,360   3,587  13,881    28,803   160,030  1,596,467
    55-64  1,751,823   184,457   4,236  22,884    28,909   187,098  2,179,407
    65-74  1,957,101   174,441   3,678  20,651    22,163   210,876  2,388,910
     > 75  1,785,239   141,694   4,241  21,052    15,610   176,468  2,144,304
   ALL MALES
          12,167,030 1,830,631  50,879 162,647   285,726 1,616,982 16,113,895
  FEMALES
     Nwbn  1,226,459   282,976   6,364  31,280    54,729   238,694  1,840,502
     < 1     225,694    63,130     992   4,977    10,696    32,354    337,843
     1- 4    260,783    68,526   2,353   4,247     7,931    35,824    379,664
     5-14    400,671    77,415   2,879   7,190    11,753    56,528    556,436
    15-24  2,216,867   618,547  17,477  32,785    99,136   383,107  3,367,919
    25-34  3,005,900   585,170  16,270  66,060   100,756   524,661  4,298,817
    35-44  1,499,852   317,137   8,981  29,891    51,556   238,909  2,146,326
    45-54  1,284,918   196,221   7,052  16,941    32,214   164,144  1,701,490
    55-64  1,699,586   200,422   4,658  17,194    24,651   185,696  2,132,207
    65-74  2,139,909   220,297   6,004  16,597    18,520   221,176  2,622,503
     > 75  2,805,962   215,240   2,607  14,834    23,990   289,830  3,352,463
 ALL FEMALES
          16,766,601 2,845,081  75,637 241,996   435,932 2,370,923 22,736,170
 GRAND TOTAL
          28,933,631 4,675,712 126,516 404,643   721,658 3,987,905 38,850,065

1986
                   DISCHARGE POPULATION FOR NHDS - 1986
                                      RACE
     AGE       White     Black    Natv   Asian     Other   Unknown      TOTAL
    GROUPS                        Amer
 MALES
     Nwbn  1,271,162   296,458   6,998  29,580    79,876   269,546  1,953,620
     < 1     288,316    81,205   2,774   6,096     7,532    50,129    436,052
     1- 4    321,975    84,772   2,439   5,678    14,042    62,651    491,557
     5-14    490,467    96,842   2,153   5,919    12,893    67,548    675,822
    15-24    799,307   151,165   4,173  12,570    29,741   124,695  1,121,651
    25-34  1,034,745   235,146   7,318  16,230    42,194   180,449  1,516,082
    35-44  1,027,238   220,806   8,042  16,318    28,918   160,801  1,462,123
    45-54  1,104,048   188,808   5,334  13,296    28,330   163,581  1,503,397
    55-64  1,627,965   171,847   5,384  22,713    31,769   206,115  2,065,793
    65-74  2,008,679   174,758   7,029  22,383    24,728   237,538  2,475,115
     > 75  1,785,230   139,465   5,872  29,373    15,912   225,864  2,201,716
   ALL MALES
          11,759,132 1,841,272  57,516 180,156   315,935 1,748,917 15,902,928
  FEMALES
     Nwbn  1,197,956   267,616   7,538  23,962    68,264   232,504  1,797,840
     < 1     197,163    49,335   2,125   3,019     6,340    36,948    294,930
     1- 4    239,508    59,411   1,981   5,510     5,340    40,245    351,995
     5-14    387,310    77,115   3,019   4,081     9,625    51,106    532,256
    15-24  1,993,699   595,696  16,396  28,886   112,041   422,334  3,169,052
    25-34  2,801,189   563,175  12,749  62,798   116,031   540,626  4,096,568
    35-44  1,471,763   281,726   6,550  28,665    44,767   258,799  2,092,270
    45-54  1,209,612   204,707   4,366  17,503    30,624   173,186  1,639,998
    55-64  1,628,950   214,906   5,448  19,686    23,144   198,575  2,090,709
    65-74  2,173,457   198,912   3,719  17,977    23,343   248,969  2,666,377
     > 75  2,772,707   225,626   5,553  17,797    24,471   326,298  3,372,452
 ALL FEMALES
          16,073,314 2,738,225  69,444 229,884   463,990 2,529,590 22,104,447
 GRAND TOTAL
          27,832,446 4,579,497 126,960 410,040   779,925 4,278,507 38,007,375

1987

                      DISCHARGE POPULATION FOR NHDS - 1987
                                      RACE
     AGE       White     Black    Natv   Asian     Other   Unknown      TOTAL
    GROUPS                        Amer
  MALES
     Nwbn  1,297,759   297,392  11,754  33,349    98,466   293,857  2,032,577
     < 1     275,500    69,486   3,145   5,047    19,509    42,850    415,537
     1- 4    311,975    91,148   3,752   7,414    15,051    48,695    478,035
     5-14    454,567    98,974   3,362   6,223    18,215    62,494    643,835
    15-24    717,737   146,918   7,131   9,004    44,486   120,354  1,045,630
    25-34    970,982   215,144   7,729  13,159    49,159   159,552  1,415,725
    35-44    998,823   201,085   6,273  13,728    43,642   149,070  1,412,621
    45-54  1,055,229   176,113   4,695  13,488    27,930   174,079  1,451,534
    55-64  1,641,266   165,618   6,955  22,495    30,582   209,818  2,076,734
    65-74  1,932,003   165,096   3,762  21,283    29,781   263,715  2,415,640
     > 75  1,741,736   157,750   6,917  18,896    24,225   263,385  2,212,909
   ALL MALES
          11,397,577 1,784,724  65,475 164,086   401,046 1,787,869 15,600,777
  FEMALES
     Nwbn  1,229,199   291,564  10,550  32,250    91,495   283,163  1,938,221
     < 1     193,753    59,927   2,536   2,968    11,848    36,014    307,046
     1- 4    216,143    57,658   2,829   5,133    10,982    33,087    325,832
     5-14    362,142    67,547   4,591   5,037    17,178    60,740    517,235
    15-24  1,884,177   560,858  19,149  29,934   144,407   410,881  3,049,406
    25-34  2,836,674   556,131  18,989  66,926   148,618   538,400  4,165,738
    35-44  1,445,732   272,320   7,964  29,834    64,620   231,919  2,052,389
    45-54  1,145,619   194,344   7,708  20,572    36,912   193,159  1,598,314
    55-64  1,515,998   202,847   5,564  16,025    34,194   197,803  1,972,431
    65-74  2,020,095   196,748   3,794  20,455    28,804   277,563  2,547,459
     > 75  2,655,780   210,736   5,908  15,947    31,570   362,703  3,282,644
 ALL FEMALES
          15,505,312 2,670,680  89,582 245,081   620,628 2,625,432 21,756,715
 GRAND TOTAL
          26,902,889 4,455,404 155,057 409,167 1,021,674 4,413,301 37,357,492
MODIFICATIONS TO ICDA-8 CLASS. OF DISEASES & SUPP. CLASS. (70-87)

 (Since diagnostic codes must have four positions, a final zero is added to
 each three-digit ICDA code that contains no fourth digit breakdown. Care
 should be used not to confuse these added fourth digit zeros with the
 four-digit ICDA codes. These modifications are to be used with reference
 to corrections and changes, see:  Updated ICDA Errata through 1970.
 Medical Record News 42(2):48-55, April 1971.)

 NOTE:  On tapes, Y codes are represented by ampersand (&), A codes by
 asterisk (*), and R codes by dash (-).

ICDA Code 180
 ICDA Code                      NHDS Modification

 180                            Modified by adding 180.0, 180.1

                                180.0   Carcinoma-in-situ of cervix uteri

                                180.1   Carcinoma of endocervix, ectocervix
                                        and cervical os
                                          Excludes: carcinoma-in-situ of
                                                    above sites (180.0)

ICDA Code 198a
 ICDA Code                      NHDS Modification

 198a                           Modified by adding 198.6-198.8 and
                                changing 198.9 as follows:

                                198.6   Lip, tongue, salivary glands, gums,
                                        mouth, specified as secondary
                                          Includes: conditions in 140-145,
                                                    specified as secondary

                                198.7   Oropharynx, nasopharynx,
                                        hypopharynx, pharynx NOS,
                                        specified as secondary
                                          Includes: conditions in 146-149,
                                                    specified as secondary

                                198.8   Connective and other soft tissue,
                                        specified as secondary
                                          Includes: conditions in 171,
                                                    specified as secondary

                                198.9   Other ill-defined sites, specified
                                        as secondary
                                          Includes: conditions in 195,
                                                    specified as secondary
 aApplies to 1971-1973 data only.

ICDA Code 199a
 ICDA Code                      NHDS Modification

 199a                           Modified by changing 199 and adding
                                199.2-199.9:

                                199     Malignant neoplasm of unspecified
                                        site and other secondary malignant
                                        neoplasm

                                199.2   Breast, specified as secondary
                                        Includes: conditions in 174,
                                                  specified as secondary

                                199.3   Cervix uteri, uterus, specified as
                                        secondary
                                          Includes: conditions in 180-182,
                                                    specified as secondary

                                199.4   Ovary, fallopian tubes, vagina,
                                        vulva, other female organs,
                                        specified as secondary
                                          Includes: conditions in 183-184,
                                                    specified as secondary

                                199.5   Prostate, specified as secondary
                                          Includes: conditions in 185,
                                                    specified as secondary

                                199.6   Testis, other male genital organs,
                                        specified as secondary
                                          Includes: conditions in 186-187,
                                                    specified as secondary

                                199.7   Thyroid gland, specified as
                                        secondary
                                          Includes:  conditions in 193,
                                                     specified as secondary

                                199.8   Adrenal gland, parathyroid gland,
                                        thymus, pituitary gland, pineal
                                        gland, other endocrine glands,
                                        specified as secondary
                                          Includes: conditions in 194,
                                                    specified as secondary

                                199.9   Spleen, specified as secondary

 aApplies to 1971-1973 data only.

ICDA Code 234.0
 ICDA Code                      NHDS Modification

 234.0                          Omitted; coded to 180.0

ICDA Code 250
 ICDA Code                      NHDS Modification

 250                            Modified by redefining 250.0, 250.9
                                and adding 250.8:

                                250.0   Diabetes with no other classifiable
                                        condition reported

                                250.8   Diabetes with classifiable
                                        conditions not specified as
                                        diabetic or due to diabetes and not
                                        listed in 250.9

                                250.9   Diabetes with:
                                        any condition specified as
                                        "diabetic" or due to diabetes
                                        any of the following with
                                        the etiology unspecified:
                                        abscess, acidosis, cataract,
                                        coma, gangrene, infection,
                                        intercapillary
                                        glomerulosclerosis,
                                        nephropathy, neuropathy of any
                                        type, other eye
                                        complications, polyuria,
                                        retinitis, ulcer
                                        any condition indexed under
                                        diabetes or with
                                        "diabetic" as an intent term
                                        under the condition
                                          Requires: adverse effect of
                                                    insulin (962.3) for
                                                    hypoglycemia with coma

ICDA Codes 292.0-292.3, 292.9
 ICDA Code                      NHDS Modification

 292.0-292.3, 292.9             Omitted; coded to 292

ICDA Codes 293.0-293.5, 293.9
 ICDA Code                      NHDS Modification

 293.0-293.5, 293.9             Omitted; coded to 293

ICDA Codes 294.0-294.4, 294.8-294.9
 ICDA Code                      NHDS Modification

 294.0-294.4, 294.8-294.9       Omitted; coded to 294

ICDA Codes 300-304
 ICDA Code                      NHDS Modification

 300-304                        The following "Excludes" note was omitted:

                                300-304 Excludes: when associated with
                                                   physical conditions (309)

ICDA Codes 309.0-309.9
 ICDA Code                      NHDS Modification

 309.0-309.9                    Omitted; coded to 309

ICDA Codes 310-315
 ICDA Code                      NHDS Modification

 310-315                        Fourth digits not used; coded to major
                                headings

ICDA Code 353
 ICDA Code                      NHDS Modification

 353                            "Includes" and "Excludes" notes modified:

                                353     Includes: infectional
                                        Excludes: lumbosacral radiculitis
                                                  (728.8), sciatica NOS
                                                  (728.8), and that due
                                                  to displacement of
                                                  intervertebral disc (725)

ICDA Codes 379.0-379.3
 ICDA Code                      NHDS Modification

 379.0-379.3                    Omitted; coded to 379

ICDA Code 400.1
 ICDA Code                      NHDS Modification

 400.1                          Modified as follows:

                                400.1   Malignant hypertension with heart
                                        involvement in 427.1-429 only
                                          Excludes: malignant hypertension
                                                    with other heart
                                                    conditions

ICDA Code 400.2
 ICDA Code                      NHDS Modification

 400.2                          Omitted; coded to 400.0 and other
                                applicable condition(s)

ICDA Code 400.3
 ICDA Code                      NHDS Modification

 400.3                          Modified as follows:

                                400.3   Malignant hypertension with renal
                                        involvement in 403, 580-584, 593.2,
                                        or 792 only
ICDA Code 400.9
 ICDA Code                      NHDS Modification

 400.9                          Omitted; coded to 400.0 and other
                                applicable condition(s)

ICDA Code 413
 ICDA Code                      NHDS Modification

 413                            Not coded when reported with conditions
                                classified to 410-412

ICDA Codes 430-438
 ICDA Code                      NHDS Modification

 430-438                        "Excludes" note omitted; "Requires" note
                                added:

                                430-438 Requires: additional code for
                                                   malignant hypertension
                                                   (400.0)

ICDA Code 463
 ICDA Code                      NHDS Modification

 463                            Additional "Excludes" note added:

                                463     Excludes: tonsillitis (acute) with
                                                  tonsillectomy or
                                                  tonsillectomy and
                                                  adenoidectomy (500)

ICDA Code 465
 ICDA Code                      NHDS Modification

 465                            "Includes" note added:

                                465     Includes: any two or more
                                                  conditions classifiable
                                                  to 460-465

ICDA Code 511.2
 ICDA Code                      NHDS Modification

 511.2                          "Includes" and "Excludes" notes added:

                                511.2   Includes: pleural effusion NOS
                                        Excludes: pleural effusion with
                                                  tuberculosis reported on
                                                  the abstract (012.2)

ICDA Code 631
 ICDA Code                      NHDS Modification

 631                            "Requires" note added:

                                631     Requires: additional code(s) for
                                                  specific infections (635,
                                                  670-671, 673.9)

ICDA Codes 631.0-631.3
 ICDA Code                      NHDS Modification

 631.0-631.3                    Modified by changing "with sepsis" to "with
                                or without sepsis"

ICDA Codes 631.4-631.6, 631.9
 ICDA Code                      NHDS Modification

 631.4-631.6, 631.9             Omitted; coded to 631.0-631.3

ICDA Codes 640-645
 ICDA Code                      NHDS Modification

 640-645                        "Requires" note added:

                                640-645 Requires: additional code(s) for
                                                   specific infections (635,
                                                   670, 671, 673.9) and
                                                   other conditions due to
                                                   abortion

ICDA Codes 640.0-640.2, 640.9
 ICDA Code                      NHDS Modification

 640.0-640.2, 640.9             Omitted; coded to 640

ICDA Codes 641.0-641.2, 641.9
 ICDA Code                      NHDS Modification

 641.0-641.2, 641.9             Omitted; coded to 641

ICDA Codes 642.0-642.3, 642.9
 ICDA Code                      NHDS Modification

 642.0-642.3, 642.9             Omitted; coded to 642

ICDA Codes 643.0-643.2, 643.9
 ICDA Code                      NHDS Modification

 643.0-643.2, 643.9             Omitted; coded to 643

ICDA Codes 644.0-644.2, 644.9
 ICDA Code                      NHDS Modification

 644.0-644.2, 644.9             Omitted; coded to 644

ICDA Codes 645.0-645.2, 645.9
 ICDA Code                      NHDS Modification

 645.0-645.2, 645.9             Omitted; coded to 645

ICDA Code 650
 ICDA Code                      NHDS Modification

 650                            Modified by adding 650.0-650.2:

                                650.0   Delivery without mention of
                                        complication

                                650.1   Delivery with complication of
                                        child-bearing not classifiable to
                                        651.1-662 (no other delivery code
                                        will be used with 650.1)
                                          Includes: delivery NOS with
                                                    complications of
                                                    pregnancy and/or
                                                    puerperium

                                650.2   Delivery with:
                                        no other classifiable condition
                                        but with a classifiable
                                        operation
                                        any condition not classifiable to
                                        the 630-678 categories
                                        (no other delivery code will be
                                        used with 650.2)

ICDA Code 661
 ICDA Code                      NHDS Modification

 661                            Modified by adding 661.7:

                                661.7   Delivery of stillborn
                                          Includes: delivery with fetal death
                                                    with gestation of 28
                                                    weeks or more; delivery
                                                    with fetal death with
                                                    gestation not stated
                                          Excludes: delivery of stillborn
                                                    with gestation of 27
                                                    weeks or less (640-645)

ICDA Code 728.8
 ICDA Code                      NHDS Modification

 728.8                          "Includes" and additional
                                "Excludes" notes added:

                                728.8   Includes: sciatica NOS
                                        Excludes: sciatica, infectional
                                                  (353)

ICDA Codes 760-771
 ICDA Code                      NHDS Modification

 760-771                        Omitted

ICDA Code 773
 ICDA Code                      NHDS Modification

 773                            Omitted

ICDA Code 779
 ICDA Code                      NHDS Modification

 779                            Omitted

ICDA Code 793
 ICDA Code                      NHDS Modification

 793                            Modified by changing definitions for 793,
                                793.0-793.1, 793.8-793.9 and adding
                                793.2-793.7:

                                793     Observation and tests with negative
                                        or unspecified findings
                                          Includes: "suspected" disorders
                                                    when "negative," "ruled
                                                    out," or "no disease
                                                    found" is stated
                                          Excludes: "suspected" disorders
                                                    with no mention of
                                                    findings

                                793.0   Observation or tests for mental
                                        conditions

                                793.1   Observation or tests for malignant
                                        neoplasms

                                793.2   Observation or tests for
                                        tuberculosis

                                793.3   Observation or tests following
                                        accident

                                793.4   Observation or tests for
                                        cardiovascular conditions

                                793.5   Observation or tests for
                                        gastrointestinal disorders

                                793.6   Observation or tests for
                                        neurological conditions except
                                        mental as in 793.0

                                793.7   Observation or tests for
                                        genitourinary disorders
                                          Excludes: pregnancy examination,
                                                    pregnancy unconfirmed
                                                    (Y004)

                                793.8   Observation or tests for other
                                        specified conditions

                                793.9   Observation or tests for
                                        unspecified conditions
                                          Includes: general examination for
                                                    well persons
                                          Excludes: well baby and child care
                                                    (Y005)

ICDA Code 795
 ICDA Code                      NHDS Modification

 795                            Omitted

ICDA Codes 796.2-796.3
 ICDA Code                      NHDS Modification

 796.2-796.3                    Omitted

ICDA Code 796.9
 ICDA Code                      NHDS Modification

 796.9                          Modified and added to as follows:

                                796.9   Other unknown and unspecified
                                        causes Undiagnosed disease Crib
                                        death Unknown cause or mortality or
                                        morbidity

ICDA Code 821
 ICDA Code                      NHDS Modification

 821                            Modified by changing 821.0-821.1 and adding
                                821.6-821.7:

                                821.0   Shaft, closed
                                        Thigh
                                        Upper leg

                                821.1   Shaft, open

                                821.6   Fracture of femur (closed) NOS

                                821.7   Fracture of femur (open) NOS

ICDA Code 846
 ICDA Code                      NHDS Modification

 846                            "Includes" note added:

                                846     Includes: low back sprain lumbar
                                        with sacral sprain

ICDA Code 847.8
 ICDA Code                      NHDS Modification

 847.8                          "Includes" note added:

                                847.8   Includes: multiple strains of back
                                        NOS

ICDA Code 910.0
 ICDA Code                      NHDS Modification

 910.0                          Modified as follows:

                                910.0   Superficial injury of eye only
                                        without mention of infection
                                          Excludes: face, neck, scalp without
                                                    mention of infection
                                                    (996.0)

ICDA Code 910.1
 ICDA Code                      NHDS Modification

 910.1                          Modified as follows:

                                910.1   Infected superficial injury of eye,
                                        face, neck and scalp

ICDA Code 911.0
 ICDA Code                      NHDS Modification

 911.0                          Omitted; coded to 996.1

ICDA Code 912.0
 ICDA Code                      NHDS Modification

 912.0                          Omitted; coded to 996.2

2ICDA Code 913.0
 ICDA Code                      NHDS Modification

 913.0                          Omitted; coded to 996.3

ICDA Code 914.0
 ICDA Code                      NHDS Modification

 914.0                          Omitted; coded to 996.4

ICDA Code 915.0
 ICDA Code                      NHDS Modification

 915.0                          Omitted; coded to 996.5

2ICDA Code 916.0
 ICDA Code                      NHDS Modification

 916.0                          Omitted; coded to 996.6-996.7

ICDA Code 917.0
 ICDA Code                      NHDS Modification

 917.0                          Omitted; coded to 996.7

ICDA Code 918.0
 ICDA Code                      NHDS Modification

 918.0                          Omitted; coded to 996.8

ICDA Codes 920, 922-929
 ICDA Code                      NHDS Modification

 920, 922-929                   Omitted; coded to 996

ICDA Codes 978-979

 ICDA Code                      NHDS Modification

 978-979                        Omitted; coded to individual adverse effects

ICDA Code 996
 ICDA Code                      NHDS Modification
 996                            "Includes" note added to as follows:

                                996     Includes: injury NOS
                                                  superficial injury
                                                  without mention of
                                                  infection, except eye
                                                  (910.0)
                                                  contusion, except
                                                  eye    (921)

E Codes
 ICDA Code                      NHDS Modification

 E codes                       NHDS does not code E codes

ICDA Codes Y00.0-Y00.3, Y00.6-Y00.9
 ICDA Code                      NHDS Modification

 Y00.0-Y00.3, Y00.6-Y00.9      Omitted; coded to 793.0-793.9

ICDA Codes Y02.0-Y02.9
 ICDA Code                      NHDS Modification

 Y02.0-Y02.9                   Omitted; coded to Y02

ICDA Code Y03
 ICDA Code                      NHDS Modification

 Y03                           Omitted

ICDA Codes Y03.0-Y03.2
 ICDA Code                      NHDS Modification

 Y03.0-Y03.2                   Omitted; coded to 019

ICDA Codes Y03.3-Y03.4, Y03.9
 ICDA Code                      NHDS Modification

 Y03.3-Y03.4, Y03.9            Omitted; coded to Y10

ICDA Codes Y06.0-Y06.1
 ICDA Code                      NHDS Modification

 Y06.0-Y06.1                   Omitted; coded to Y06

ICDA Code Y07
 ICDA Code                      NHDS Modification

 Y07                           "Excludes" note added:

                               Y07      Excludes: patient admitted in any
                                                  stage of delivery
                                                  (650-662)
                                                  patient admitted with
                                                  post-partum abnormality
                                                  (670-678)

ICDA Code Y09.0
 ICDA Code                      NHDS Modification

 Y09.0                         "Includes" note added:

                               Y09.0    Includes: patients admitted for
                                                  sterilization with
                                                  indications other than
                                                  illness (e.g.,
                                                  multi-parity or
                                                  socio-economic
                                                  problems)
                                                  habitual aborter, not now
                                                  pregnant, admitted for
                                                  sterilization
ICDA Code Y09.9a
 ICDA Code                      NHDS Modification

 Y09.9a                       "Includes" and "Excludes" notes added:

                               Y09.9    Includes: Healthy donors of skin,
                                                  bone, or blood
                                        Excludes: Organ donors (Y14)
 aApplies to 1971-1973 data only.

ICDA Code Y10.2
 ICDA Code                      NHDS Modification

 Y10.2                         "Includes" and "Excludes" notes added:

                               Y10.2    Includes: admission for irrigation
                                        Excludes: malfunction or
                                                  complication
ICDA Code Y10.4
 ICDA Code                      NHDS Modification

 Y10.4                         "Includes" note added:

                               Y10.4    Includes: admitted for removal or
                                                  change of cast, splints,
                                                  pins, plates, rods, or
                                                  other orthopedic
                                                  device
ICDA Code Y10.5
 ICDA Code                      NHDS Modification

 Y10.5                         "Includes" note added:

                               Y10.5    Includes: admission for change of
                                                 dressing, removal of
                                                 sutures, catheters,
                                                 packing
                                                 tracheostomy status,
                                                 gastrostomy status,
                                                 other artificial
                                                 openings

ICDA Code Y11.9
 ICDA Code                      NHDS Modification

 Y11.9                         "Includes" note added:

                               Y11.9    Includes: admission for "face
                                                  lift" without
                                                  classifiable condition

ICDA Code Y12.4
 ICDA Code                      NHDS Modification

 Y12.4                         Omitted; coded to Y10.2

ICDA Codes Y14, Y14.0-Y14.3, Y14.9b
 ICDA Code                      NHDS Modification

 Y14, Y14.0-Y14.3, Y14.9b      Omitted; coded to Y09.9

 bApplies to 1970 and 1974-1978 data only.

ICDA Codes Y15, Y15.0-Y15.3, Y15.9
 ICDA Code                      NHDS Modification

 Y15, Y15.0-Y15.3, Y15.9       Omitted

ICDA Code Y20
 ICDA Code                      NHDS Modification

 Y20                           Modified and "Includes" note added:

                               Y20      Single born, without mention of
                                        immaturity or any other codable
                                        condition
                                          Includes: only premature, immature,
                                                    or well infants born this
                                                    admission

ICDA Codes Y21-Y29
 ICDA Code                      NHDS Modification

 Y21-Y29                       "Includes" note added:

                               Y21-Y29  Includes: only premature, immature,
                                                  or well infants born this
                                                  admission

ICDA Code Y30
 ICDA Code                      NHDS Modification

 Y30                           Omitted

MODIFICATIONS (CONTINUED)
New ICDA Code
 ICDA Code                     NHDS Modification

 ---                           Code 00.0 added:

                               00.0     Use when an operation is not
                                        indexed and there is no information
                                        reported to aid in the assignment
                                        of a more specific operation code

ICDA Code 01.1
 ICDA Code                      NHDS Modification

 01.1                          Omitted; coded to 01.7

ICDA Code 01.7
 ICDA Code                      NHDS Modification

 01.7                          "Requires" note omitted

ICDA Code 14
 ICDA Code                      NHDS Modification

 14                            Modified by adding 14.6:

                               14.6     Extraction of cataract NOS
                                          Includes:  extraction of lens NOS

ICDA Code 19.3
 ICDA Code                      NHDS Modification

 19.3                          "Excludes" note omitted

ICDA Code 20.5
 ICDA Code                      NHDS Modification

 20.5                          Additional "Includes" note added:

                               20.5     Includes:  tracheolaryngotomy

ICDA Code 21.6
 ICDA Code                      NHDS Modification

 21.6                          Additional "Includes" note added:

                               21.6     Includes:  excision of branchial
                                                  cleft cyst

ICDA Code 22.0
 ICDA Code                      NHDS Modification

 22.0                          Modified by omitting "laryngotracheotomy" and
                               "tracheolaryngotomy" from list (20.5)

ICDA Code 22.6
 ICDA Code                      NHDS Modification

 22.6                          Omitted; coded to 21.6

ICDA Code 25.2
 ICDA Code                      NHDS Modification

 25.2                          Additional "Includes" note added:

                               25.2     Includes:  radical neck dissection
                                                  (excision)

ICDA Code 30.2
 ICDA Code                      NHDS Modification

 30.2                          Modified by changing definition:

                               30.2     Cardiac catherterization, right or
                                        left heart

ICDA Code 30.3
 ICDA Code                      NHDS Modification

 30.3                          Omitted; coded to 30.2

ICDA Code 30.6
 ICDA Code                      NHDS Modification

 30.6                          Modified and "Excludes" note added:

                               30.6     Open heart surgery (with or without
                                        cardiopulmonary bypass) NOS
                                          Excludes:  that involving specified
                                                    heart surgery
                                                    (29.2-29.6)

ICDA Code 30.7
 ICDA Code                      NHDS Modification

 30.7                          Omitted; coded to 30.6

ICDA Code 40.3
 ICDA Code                      NHDS Modification

 40.3                          "Includes" note added and Excludes" note
                               changed:

                               40.3     Includes:  abdominal adhesions,
                                                  adhesions NOS, pelvic--
                                                  male only
                                        Excludes:  adhesions,
                                                  pelvic--female   (71.8)

ICDA Code 41.1
 ICDA Code                      NHDS Modification

 41.1                          "Excludes" note added:

                               41.1     Excludes:  incidental appendectomy

ICDA Code 50
 ICDA Code                      NHDS Modification

 50                            Modified "Includes" note by omitting "those
                               by proctoscopy and sigmoidoscopy;" coded to
                               A4.5

ICDA Code 51
 ICDA Code                      NHDS Modification

 51                            Modified "Includes" note by omitting "those
                               by anoscopy or proctoscopy;" coded to A4.5

ICDA Code 54
 ICDA Code                      NHDS Modification

 54                            Modified "Includes" note by omitting "those
                               by pyeloscopy;" coded to A4.6

ICDA Code 54.6
 ICDA Code                      NHDS Modification

 54.6                          "Excludes" note omitted

ICDA Code 54.8
 ICDA Code                      NHDS Modification

 54.8                          Modified "Includes" note by omitting "use
                               this code for solo procedures only"

ICDA Code 55
 ICDA Code                      NHDS Modification

 55                            Modified "Includes" note by omitting "those
                               by cystoscopy or ureteroscopy;" coded to A4.6
ICDA Code 56
 ICDA Code                      NHDS Modification

 56                            Modified "Includes" note by omitting "those
                               by cystoscopy (transurethral);" coded to A4.6

ICDA Code 56.8
 ICDA Code                      NHDS Modification

 56.8                          "Requires" note added:

                               56.8     Requires:  additional code for
                                                  cystoscopy

ICDA Code 57
 ICDA Code                      NHDS Modification

 57                            Modified "Includes" note by omitting "those
                               by cystoscopy or urethroscopy;" coded to A4.6

ICDA Code 61.2
 ICDA Code                      NHDS Modification

 61.2                          "Excludes" note added:

                               61.2     Excludes:  routine circumcision for
                                                  newborn infant born in
                                                  hospital this admission

ICDA Code 65
 ICDA Code                      NHDS Modification

 65                            Modified by changing 65.7 "Excludes" note,
                               adding 65.8, and adding additional 65.9
                               "Includes" note:

                               65.7     Excludes:  augmentation mammoplasty
                                                  (65.8), mammoplasty
                                                  reduction (65.9)

                               65.8     Augmentation mammoplasty
                                          Includes:  that for:
                                                    acquired absence
                                                     (total)
                                                     hypomastia
                                                     that by:
                                                     free dermal-fat
                                                     -fascia graft
                                                     implantation of
                                                     prosthetic material
                                                     local pedicle graft
                                                     of dermal-fat
                                                     percutaneous
                                                     injection

                               65.9     Includes:  reduction mammoplasty,
                                                   amputative mammoplasty

ICDA Code 68c
 ICDA Code                      NHDS Modification

 68c                           Modified by adding 68.8:

                               68.8     Bilateral endoscopic destruction
                                        and occlusion of fallopian tubes
 cApplies to 1977-1978 data only.

ICDA Code 69.1
 ICDA Code                      NHDS Modification

 69.1                          Additional "Includes" note added:

                               69.1     Includes:  hysterectomy NOS

ICDA Code 69.4
 ICDA Code                      NHDS Modification

 69.4                          Additional "Includes" note added:

                               69.4     Includes:  vaginal hysterectomy NOS

ICDA Code 71
 ICDA Code                      NHDS Modification

 71                            Modified "Includes" note by omitting "those
                               by vaginoscopy, colposcopy and culdoscopy;"
                               coded to A4.7, A5.4

ICDA Code 71.6
 ICDA Code                      NHDS Modification

 71.6                          Additional "Includes" note added:

                               71.6     Includes:  pelvic examination under
                                                  anesthesia

ICDA Code 74.7
 ICDA Code                      NHDS Modification

 74.7                          Additional "Includes" note added:

                               74.7     Includes:  missed abortion

ICDA Codes 75.0-75.6
 ICDA Code                      NHDS Modification

 75.0-75.6                     Omitted

ICDA Code 75.7
 ICDA Code                      NHDS Modification

 75.7                          "Requires" note omitted

ICDA Code 75.8
 ICDA Code                      NHDS Modification

 75.8                          "Requires" note omitted

ICDA Code 75.9
 ICDA Code                      NHDS Modification

 75.9                          Omitted

ICDA Code 77.0
 ICDA Code                      NHDS Modification

 77.0                          Modified as follows:

                               77.0     Cesarean section, all types

ICDA Codes 77.1-77.2, 77.8-77.9
 ICDA Code                      NHDS Modification

 77.1-77.2, 77.8-77.9          Omitted, coded to 77.0

ICDA Codes 82, 82.0-82.2
 ICDA Code                      NHDS Modification

 82, 82.0-82.2                 Redefined as follows:

                               82       Reduction of fracture and fracture
                                        dislocation

                               82.0     Reduction (closed or NOS) of
                                        fracture without mention of
                                        internal fixation as in 82.2

                               82.1     Open reduction of fracture without
                                        mention of fixation as in 82.2

                               82.2     Reduction (open or closed) of
                                        fracture with mention of fixation
                                          Includes:  reduction or treatment
                                                    of fracture of sites
                                                    codable to 82 with
                                                     mention of the following
                                                     whether or not traction
                                                     or cast or any other
                                                     external support was
                                                     also mentioned:
                                                    band, nail, pin,
                                                     press, screw, caliper,
                                                     plate, rod, wire,
                                                     brace, tongs, bolt

ICDA Codes 82.3-82.9
 ICDA Code                      NHDS Modification

 82.3-82.9                     Omitted; coded to 82.0-82.2

ICDA Codes 83-84
 ICDA Code                      NHDS Modification

 83-84                         Omitted; coded to 82.0-82.2

ICDA Code 86.1
 ICDA Code                      NHDS Modification

 86.1                          Additional "Includes" note added:

                               86.1     Includes:  excision of carpal
                                                  tunnel

ICDA Code 87.0
 ICDA Code                      NHDS Modification

 87.0                          Modified as follows:

                               87.0     Arthroplasty of hip with or without
                                       mechanical device

ICDA Code 87.1
 ICDA Code                      NHDS Modification

 87.1                          Omitted; coded to 87.0

ICDA Code 94.2
 ICDA Code                      NHDS Modification

 94.2                          Omitted; coded to 19.3

ICDA Code 94.4
 ICDA Code                      NHDS Modification

 94.4                          Omitted; coded to 65.8

ICDA Code 94.5
 ICDA Code                      NHDS Modification

 94.5                          Modified "Includes" note by omitting
                               "amputative mammoplasty," "reduction
                               mammoplasty," and "breasts (hypertrophic
                               pendulous) (atrophic) (gynecomastia);" coded
                               to 65.9

ICDA Code 96.1
 ICDA Code                      NHDS Modification

 96.1                          Additional "Includes" note added:

                               96.1     Includes:  frenumectomy

ICDA Code 96.2
 ICDA Code                      NHDS Modification

 96.2                          Modified "Includes" note by omitting
                               "frenumectomy;" coded to 96.1

ICDA Codes 98.0-98.1
 ICDA Code                      NHDS Modification

 98.0-98.1                     Modified as follows:

                               98.0     Closed reduction, malar, zygoma,
                                        zygomatic arch, maxilla, mandible,
                                        alveolus
                                          Includes:  wiring

                               98.1     Open reduction, malar, zygoma,
                                        zygomatic arch, maxilla, mandible,
                                        alveolus
                                          Includes:  only that which involves
                                                    the dissection of
                                                    tissues

ICDA Codes 98.2-98.6
 ICDA Code                      NHDS Modification

 98.2-98.6                     Omitted; coded to 98.0-98.1

ICDA Code A1
 ICDA Code                      NHDS Modification

 A1                            "Excludes" note omitted

ICDA Codes A4.2-A4.7, A4.9
 ICDA Code                      NHDS Modification

 A4.2-A4.7, A4.9               Modified by deleting "without effect upon
                               tissue or lesion"

ICDA Codes R1, R4
 ICDA Code                      NHDS Modification

 R1, R4                       Omitted


UHDDS CLASS 4 PROCEDURES NOT CODED BY THE NHDS (1979-1987)
        08.19
        16.21
        18.01
        18.11
        18.19
        21.21
        21.29
        22.19
        24.19
        25.09
        25.91
        26.19
        27.29
        27.91
        28.19
        29.19
        31.48-31.49
        41.38-41.39
        42.29
        44.19
        45.19
        45.28-45.29
        48.23
        48.29
        49.21
        49.29
        49.41
        58.29
        61.19
        64.19
        64.91
        64.94
        69.92
        70.2l
        73.91-73.92
        75.35
        85.19
        86.19
        86.92
        87.09-87.12
        87.16-87.17
        87.22-87.29
        87.36-87.37
        87.39
        87.43-87.49
        87.69
        87.79
        87.85-87.89
        87.92
        87.95-87.99
        88.09
        88.16-88.31
        88.33
        88.35
        88.37
        88.39
        89.01-89.13
        89.15-89.16
        89.26-89.31
        89.33-89.39
        89.45-89.53
        89.55-89.59
        89.66
        89.7
        90.01-91.99
        93.01-93.25
        93.27-93.28
        93.31-93.39
        93.42-93.44
        93.61-93.91
        93.94
        93.96
        93.99-94.23
        94.25
        94.29-95.03
        95.05-95.11
        95.l4-95.15
        95.31-95.49
        96.09-96.19
        96.26-96.28
        96.34-97.04
        97.14-97.69
        97.72-97.89
        99.02-99.24
        99.26-99.59
        99.71-99.79
        99.82-99.99


DEFINITIONS OF CERTAIN TERMS USED IN THIS DOCUMENT
 
Hospitals.--Short-stay special and general hospitals having six beds or
 more for inpatient use and an average length of stay of less than 30 days.
 Federal hospitals and hospital units of institutions are not included.

 Bed size of hospital.--Measured by the number of beds, cribs, and
 pediatric bassinets regularly maintained (set up and staffed for use) for
 patients; bassinets for newborn infants are not included.

 Type of ownership of hospital.--The type of organization that controls and
 operates the hospital. Hospitals are grouped as follows:

 Voluntary nonprofit.--Hospitals operated by a church or another nonprofit
 organization.

 Government.--Hospitals operated by State or local governments.

 Proprietary.--Hospitals operated by individuals, partnerships, or
 corporations for profit.

 Patient.--A person who is formally admitted to the inpatient service of a
 short-stay hospital for observation, care, diagnosis, or treatment.

 Discharge.--The formal release of a patient by a hospital, that is, the
 termination of a period of hospitalization by death or by disposition to
 place of residence, nursing home, or another hospital.

 Discharge diagnosis.--One or more diseases or injuries (or special
 conditions and examinations without sickness or tests with negative
 findings) that the attending physician assigns to the medical record of
 patients. (See "MEDICAL CODING AND EDIT")

 Operation.--One or more surgical operations, procedures, or special
 treatments that are assigned by the physician to the medical record of
 patients discharged from the inpatient service of short-stay hospitals.
 (See "MEDICAL CODING AND EDIT")

 Age.--Patient's age refers to age at birthday prior to admission to the
 hospital inpatient service.

 Race.--Patients are classified into the six groups listed in the Tape
 Record Format under Race (item 18).

 Geographic region and division.--Hospitals are classified by location into
 one of the four geographic regions and nine geographic divisions of the
 United States (items 20 and 21 in the Tape Record Format), which
 correspond to those used by the U.S. Bureau of the Census.


QUESTIONS
 
 Questions concerning data on the tape should be directed to the Hospital
 Care Statistics Branch, Division of Health Care Statistics, National
 Center for Health Statistics, Center Building, Room 2-43, 3700 East-West
 Highway, Hyattsville, Maryland 20782, (301)-436-7125.
REFERENCES
 
 National Center for Health Statistics: Development of the Design of the
 NCHS Hospital Discharge Survey, by W. R. Simmons. Vital and Health
 Statistics. PHS Pub. No. 1000, Series 2-No. 39. Public Health Service.
 Washington. U.S. Government Printing Office, Sept. 1970.

 National Center for Health Statistics: Development and Maintenance of a
 national inventory of hospitals and institutions. Vital and Health
 Statistics. PHS Pub. No. 1000, Series 1 No. 3. Public Health Service.
 Washington. U.S. Government Printing Office, Feb. 1965.

 National Center for Health Statistics: International Classification of
 Diseases, 9th Revision, Clinical Modification.DHHS Pub. No.(PHS)80-1260.
 Public Health Service. Washington. U.S. Government Printing Office,
 Sept.1980.



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