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Scientific Data Documentation
National Hospital Discharge Survey, 1992
DSN: CC36.NHDS92

ABSTRACT
 

1992 NATIONAL HOSPITAL DISCHARGE SURVEY (NHDS)
PUBLIC USE DATA TAPE DOCUMENTATION

 This material provides documentation for users of the NHDS Public Use Data
 Tapes. The NHDS is conducted annually by the National Center for Health Statis-
 tics (NCHS) and is the principal source of information on impatient hospital
 utilization in the United States. Section I describes the survey and includes
 information on the history and scope of the NHDS; the methodology followed,
 including data collection and medical coding procedures; population estimates;
 measurement errors and sampling errors.
  Section II provides technical details of the tape including number of tracks
 and record length. Section III provides a detailed description of the contents
 of each data record, including the coding and location of each data element.
 Appendix A defines certain terms used in this document; Appendix B lists the
 ICD-9-CM Addenda; Appendix C provides population estimates to allow the user
 to calculate rates; and Appendix D provides unweighted and weighted frequen-
 cies for selected descriptive variables.

Description of the NHDS
        I.  DESCRIPTION OF THE NATIONAL HOSPITAL DISCHARGE SURVEY

 Introduction:  This document and its appendices contain information for users
 of the 1992 National Hospital Discharge Survey Public Use Data Tape.  This
 survey, conducted annually by National Center for Health Statistics, collects
 medical and demographic info. from a sample of hospital discharge records.
 It is the basis for calculating statistics on inpatient hospital utilization
 in the  United States.  For a description of the survey design and data
 procedures, see below.  For a more detailed description of the survey design,
 data collection procedures, and the estimation process, see Reference l.
 Publications based on the data for each survey year can be obtained from the
 Government Printing Office.  For information or questions about publications,
 contact the Data Dissemnation Branch, NCHS, 301-436-8500.

 History:  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 l962 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, an
 elements of the U.S. Public Health Service, the NCHS initiated the National
 Hospital Discharge Survey in l964.

 SURVEY METHODOLOGY

 Source of the Data:  The National Hospital Discharge Survey (NHDS) covers
 discharges from noninstitutional hospitals, exclusive of Federal, military,
 and Veterans Administrative hospitals, located in the 50 States and the
 District of Columbia.  Only short-stay hospitals (hospitals with an average
 length of stay for all patients of less than 30 days) or those whose
 specialty is general (medical or surgical) or children's general are included
 in the survey.  These hospitals must also have six or more beds staffed
 for patient use.  These criteria, used from 1988 through the current
 survey year, differ slightly from those used prior to 1988.

 Beginning with 1988, the NHDS sampling frame consisted of hospitals that were
 listed in the April 1987 SMG Hospital Market Tape (2), met the above criteria,
 and began accepting patients by August 1987.  For 1992 the sample consisted
 of 528 hospitals.  Of the 528 hospitals, 14 were found to be out of scope
 (ineligible) because they went out of business or otherwise failed to meet
 the criteria for the NHDS universe. Of the 514 inscope (eligible) hospitals,
 494 hospitals responded to the survey.

 SAMPLE DESIGN AND DATA COLLECTION

 The NCHS has conducted the NHDS continuously since 1965.  The original sample
 was selected in 1964 from a frame of short-stay hospitals listed in the
 National Master Facility Inventory. That sample was updated periodically with
 samples of hospitals that opened later.  Sample hospitals were selected
 with probabilities ranging from certainty for the largest hospitals to 1 in
 40 for the smallest hospitals.  Within each sample hospital, a systematic
 random sample of discharges was selected.  A report on the design and
 development of the original NHDS was published (1).

 In 1988, the NHDS was redesigned to provide geographic sampling comparability
 with other surveys conducted by the NCHS; to update the sample of hospitals
 selected into the survey; and to maximize the use of data collected through
 automated systems.  The redesigned NHDS sample included with certainty
 all hospitals with 1,000 or more beds or 40,000 or more discharges
 annually.  The remaining sample of hospitals was based on a stratified,
 three-stage design. The first stage consisted of selecting 112 primary sampling
 units (PSU's) that comprised a probability subsample of PSU's used in the
 1985-94 National Health Interview Survey.  The second stage consisted
 of selecting non-certainty hospitals from the sample PSU's.  At the third
 stage a sample of discharges was selected by a systematic random sampling
 technique.

 These changes in the survey may affect trend data, that is, some of the
 differences between NHDS statistics based on the 1965-87 sample and statistics
 based on the sample drawn for the new design may be due to sampling error
 rather than changes in hospital utilization.

 Two data collection procedures were used for the survey.  The first was a
 manual system of sample selection and data abstraction, used for approximately
 66 percent of the responding hospitals.   The second was an automated method,
 used for approximately 34 percent of the respondent hospitals, that involved
 the purchase of computerized data tapes from abstracting service
 organizations, state data systems, or hospitals.

 In the manual system, the sample selection and the transcription of information
 from the hospital records to abstract forms were performed at the hospitals.
 Of the hospitals using this system in 1992, about 58 percent had the work perfo
 by their own medical records staff.  In the remaining hospitals using the
 manual system, personnel of the U.S. Bureau of the Census did the work on
 behalf of NCHS.  The completed forms, along with sample selection control
 sheets, were forwarded to NCHS for coding, editing, and weighting.

 For the automated system, NCHS purchased tapes containing machine-readable
 medical record data from which records were systematically sampled by NCHS.

 The Medical Abstract Form (Figure 1) and the automated data contain items
 relating to the personal characteristics of the patient, including birth date
 or age, 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.  Since 1977, patient zip
 code, expected source of payment,and dates of surgery have also been collected.
 (The medical record number, date of birth,and patient zip code are confidential
 information and are not available to the public.)


 MEDICAL CODING AND EDIT

 The medical information that was recorded manually on the sample patient
 abstracts was coded centrally by NCHS staff.  A maximum of seven diagnostic
 codes was  assigned for each sample abstract; in addition, if the medical
 information included surgical or nonsurgical procedures, a maximum of
 four codes for these procedures was assigned.  The system currently used for
 coding the diagnoses and procedures on the medical abstract forms as well as
 on the commercial abstracting services data tapes, is the International
 Classification of Diseases, 9th Revision, Clinical Modification, or
 ICD-9-CM (3).  All of the diagnostic and procedure codes in the ICD-
 9-CM are utilized.

 NHDS usually presents diagnoses and procedures in the order they are listed
 on the abstract form or obtained from abstract services, however, there are
 exceptions.  For women discharged after a delivery, a code of V27 from the
 supplemental classification is entered as the second-listed code with
 a code designating either normal or complicated delivery in the first-listed
 position.  In another exception, a decision was made to reorder some acute
 myocardial infarction diagnoses.  If an acute myocardial infarction is listed
 with other circulatory diagnoses and is other than the first entry,
 it is reordered to first position.  If a symptom appears as a first-listed
 code and a diagnosis appears as a secondary code, the diagnosis replaces the
 symptom, which is moved back.

 Following conversion of the data on the medical abstract to computer tape and
 combining it with the automated data tapes, a final medical edit was
 accomplished by computer inspection and by a manual review of rejected
 records.  Priority was given to medical information in the editing decision.

 Figure 1.  Medical abstract for the l992 National Hospital Discharge Survey
 Users of the National Hospital Discharge Survey (NHDS) diagnostic and/or
 procedure data, which is coded to the ICD-9-CM, must take into account annual
 ICD-9-CM addenda.  Changes go into effect on October 1 of the calendar year.
 A list of the changes for 1986 through 1991 appears in Appendix B.  All
 coding of the 1992 data is consistent with the ICD-9-CM and the addendum
 effective October 1, 1991.  Information provided by automated systems
 three months of 1992 which was coded using the October 1992 addendum was
 converted back to the previous code assignment.  This was done in order to
 provide consistency and allow correct annual estimation.

 The Uniform Hospital Discharge Data Set (UHDDS):  Starting with 1979 data,
 the NHDS has followed guidelines of the Uniform Hospital Discharge Data Set
 (UHDDS) within the confines of its contractual agreement with participating
 hospitals.  The UHDDS is a minimum data set of items uniformly defined (4).
 These items were selected on the basis of their  usefulness to a broad range
 of organizations and agencies requiring hospital information, uniformity of
 definition, and general availability from medical records and abst

 Population Estimates:  Appendix C shows population estimates provided by the
 U.S. Bureau of the Census.  The estimates are of the U.S. civilian resident
 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 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 one-half of one percent of
 the discharge records failed to include the sex of patient.  Age birth was
 available for all records.  If the hospital record did not state the
 patient, it was imputed by assigning the patient an age or sex consistent
 with the age or sex of other sampled patients with the same diagnostic code.
 In approximately one percent of the records, the age or sex was edited,
 because it was inconsistent with the diagnosis.  Data on race was missing
 for 25 percent of the records, and no attempt was made to impute for these
 missing values.

 During 1992, ten percent of the records lacked the day of admission or day of
 discharge, but included a length of stay and a discharge month.  For records
 with a length of stay greater than 30 days, a discharge day of the 20th of
 the month was assigned to the record and the admission date was computed
 based on the given length of stay.  For records with a length of stay
 or less, a discharge day of the 30th of the month was assigned and the
 admission date was computed from the length of stay.  Other edit and
 imputation procedures may have been applied to data in the NHDS collected in
 automated form.

 Sampling errors and rounding of numbers:  The standard error of an estimate
 is primarily a measure of sampling variability that occurs by chance because
 only a sample rather than the entire universe is surveyed.  The relative
 standard error of an estimate is obtained by dividing the standard error by
 the estimate itself.  The resulting value is multiplied by 100, so standard
 error is expressed as a percent of the estimate.  Estimates of sampling
 variability were calculated with SESUDAAN software, which computes standard
 errors by using a first-order Taylor series approximation of the deviation
 of estimates from their expected values.  A description of the software and
 the approach it uses was published by Shah (5).

 RELATIVE STANDARD ERRORS FOR AGGREGATE ESTIMATES

 Approximate relative standard errors for aggregate estimates are presented in
 Table 1.  To derive error estimates that would be applicable to a wide
 variety of statistics, numerous variances were calculated and a best fit
 formula was produced.  The curves were based on an empirically determined
 relationship between the size of an estimate X and its relative variance.
 The relative standard error is then derived by taking the square root of the
 relative variance.  The relative standard error of an estimate X, RSE(X),
 expressed as a percent, may be calculated from the formula:

 RSE(X) = 100      a+b/X

 with a and b provided in Table 1.

 For example, in 1992 the number of discharges from short-stay hospitals for
 females with a first-listed diagnosis of atherosclerotic heart disease
 (ICD-9-CM code 414.0) was 130,000.  Using the applicable constants from Table
 1 for estimates by sex produces:

              RSE(130,000) = 100   .00089 + 404.530 / 130,000

              RSE(133,000) = 6.33%

 The relative standard error for the estimate of interest is 6.33 percent.
 From this the standard error is obtained by multiplying the relative standard
 error by the estimate:

              130,000 * 6.33% =  8,229

 The standard error can be employed to generate confidence intervals or for
 statistical testing. In this example, the 68% confidence interval for the
 estimate of female inpatients with a first-listed diagnosis of
 atherosclerotic heart disease is:

              (130,000 - 8,229) <-> (130,000 + 8,229)

              121,771 <-> 138,229

 Table 1.  Parameter values for relative standard errors for National Hospital
 Discharge Survey aggregate statistics by statistic type:  United States, 1992


             NUMBER OF DISCHARGES OR FIRST-LISTED DIAGNOSES

                                Constant a    Constant b

             Total               0.00097       449.059

                Sex
             Male                0.00377       355.244
             Female              0.00089       404.530

                Age
             Under 15 years      0.06075        81.775
             15-44 years         0.01291        44.505
             45-64 years         0.00656       147.706
             65 years and over   0.00175       464.831

                Region
             Northeast           0.00275       277.031
             Midwest             0.00358       296.767
             South               0.00375       464.132
             West                0.00006      1168.044

                Source of Payment
           Worker's compensation 0.00515     294.690
           Medicare              0.00903       398.793
           Medicaid              0.00180      1343.134
           Not stated            0.11386      3464.679
           Other Government      0.05453       746.774
           Private               0.00131      1438.292
           Self                  0.00340       756.736
           No charge/other       0.02170       528.001

                 Race
             White               0.00241       419.274
             Black               0.00740       363.901
             All other           0.02271       182.649
             Not stated          0.01496       301.892
                           ALL-LISTED DIAGNOSES


                                 Constant a     Constant b

              Total               0.00109        522.555

                 Sex
              Male                0.00337        270.306
              Female              0.00100        427.561

                 Age
              Under 15 years      0.05545         74.719
              15-44 years         0.00691        114.487
              45-64 years         0.00701        130.811
              65 years and over   0.00011        723.890

                 Region
              Northeast           0.00502        346.947
              Midwest             0.00478       1594.237
              South               0.00476        467.704
              West                0.00010       1614.334

                 Source of Payment
            Worker's compensation 0.00369     1659.858
            Medicare              0.01151       1891.797
            Medicaid              0.00144       9741.000
            Not stated            0.07015       7089.800
            Other Government      0.04779       4107.199
            Private               0.00377      15682.000
            Self                  0.00437       1981.113
            No charge/other       0.02299       1257.851

               Race
              White               0.00260        482.914
              Black               0.00543        397.312
              All other           0.02601        231.603
              Not stated          0.01449        914.057

                           ALL-LISTED PROCEDURES


                                 Constant a      Constant b

              Total               0.00143        377.158

                 Sex
              Male                0.00465        336.276
              Female              0.00124        416.841

                 Age
              Under 15 years      0.10248         74.715
              15-44 years         0.00903        153.675
              45-64 years         0.00494        295.564
              65 years and over   0.00986        288.155

                 Region
              Northeast           0.00556        166.484
              Midwest             0.00587        240.949
              South               0.00298        430.632
              West                0.00831        735.033

                 Source of Payment
            Worker's compensation 0.01445       2263.365
            Medicare              0.00654        702.706
            Medicaid              0.00263       2720.177
            Not stated            0.18533       3807.025
            Other Government      0.08664        606.397
            Private               0.00210       2294.972
            Self                  0.00713       1071.297
            No charge/other       0.02185        921.546

                 Race
              White               0.00314        404.253
              Black               0.00705        287.323
              All other           0.02977        150.761
              Not stated          0.01695        230.278

                               DAYS OF CARE


                                 Constant a     Constant b

              Total               0.00150       2671.104

                 Sex
              Male                0.00823        995.275
              Female              0.00149       1914.510

                 Age
              Under 15 years      0.12836         71.171
              15-44 years         0.02014        222.396
              45-64 years         0.01746        151.920
              65 years and over   0.01680        456.313

                 Region
              Northeast           0.00489       2079.029
              Midwest             0.00557       1297.946
              South               0.00457       1148.825
              West                0.02108       1902.219

                 Source of Payment
            Worker's compensation 0.00773       2510.311
            Medicare              0.01205       2940.060
            Medicaid              0.00071      29011.000
            Not stated            0.03570      14944.000
            Other Government      0.03381       5357.217
            Private               0.00093      22065.000
            Self                  0.00534       5073.313
            No charge/other       0.01889       7453.201

                 Race
              White               0.00365       1422.804
              Black               0.01826       1176.619
              All other           0.04065        263.783
              Not stated          0.01615       1443.019

RELATIVE STANDARD ERROR FOR ESTIMATES OF PERCENTS

 Approximate relative standard errors for estimates of percents may be
 calculated from Table 1  also.  The relative standard error for a percent,
 100 p (0<p<1), (expressed as a percent), may  be calculated using the
 formula:


              RSE(p) = 100  b(1 - p)/(pX)

 where 100 p is the percent of interest, X is the base of the percent,
 and b is the parameter b in the formula for approximating the RSE(X).
 The values for b are given in Table 1.

 For example, in 1992 the estimated number of discharges from short-stay
 hospitals which were female was 18,545,000.  This is 59.9 percent of the
 estimated 30,951,000 discharges for that year.  Using the applicable
 constants from Table 1 for estimates by sex produces:

          RSE(.599) = 100   404.530 * (1 - .599) / (.599 * 30,951,000)

          RSE(.599) = 0.296%

 The relative standard error for the estimate of interest is 0.296 percent.
 From this the standard error is obtained by multiplying the relative standard
 error by the estimate:

          S(.599) = .599 * 0.296% = 0.00177.

 The standard error can be employed to generate confidence intervals for
 statistical testing.  In this example, the 68% confidence interval for the
 estimate of the percentage of female inpatients is:

                   (.599 - 0.00177) <-> (.599 + 0.00177)

                            .5972   <->  .6008

 or, equivalently,           59.7%  <->   60.1%


 Presentation of Estimates:  Publication of estimates for the NHDS is based
 on the relative standard error of the estimate and the number of sample
 records on which the estimate is based (referred to as the sample size).
 Estimates are not presented in NCHS reports unless a reasonable assumption
 regarding the probability distribution of the sampling error is Based on
 consideration of the complex sample design of the NHDS, the following
 guidelines are used for presenting the NHDS estimates:

              If the sample size is less than 30, the value of the estimate
              is not reported.

              If the sample size is 30-59, the value of the estimate is reported
              but should not be assumed reliable.

              If the sample size is 60 or more and the relative standard error
              is less than 30 percent, the estimate is reported.

              If the sample size is 60 or more but the relative standard error
              is over 30 percent, the estimate is reported but should not be
              assumed reliable.

 How to Use the Data Tape:  The NHDS records are weighted to allow inflation
 to national or regional estimates.  The weight applied to each record
 is found in tape location lll-ll5.  To produce an estimate of the number of
 discharges, the weights for the desired records must be summed.  To produce an
 estimate for number of days of care, the weight must be multiplied by
 the length of stay (tape location l0l-l04) and these products are summed.
 Length of stay data can be obtained by using recodes already on the tape
 (see items l4 and 18 in the tape layout), or by dividing days of care by
 number of discharges as calculated above.

 Appendix D contains unweighted and weighted frequencies for selected
 descriptive variables on the data tape.  These may be used as a
 cross-check when processing the data on the user's system.

 MONTHLY AND SEASONAL ESTIMATES UNDER THE NEW DESIGN

 An important difference between the old and new designs is the method used
 to adjust for nonresponse.  In the old design, weights for responding
 hospitals were adjusted each month to account for hospitals that did not
 respond for that month.  In the new design, the type of nonresponse
 adjustment applied depended on whether the hospital was considered a
 nonrespondent or partial respondent.  A nonresponding hospital was one which
 failed to provide at least half of the expected number of discharges for at
 least half of the months for which it was inscope.  In this case, weights of
 discharges from hospitals similar to the nonresponding hospital
 were inflated to account for discharges of the nonrespondent hospital.
 However, this adjustment was performed just once, after the close out of the
 survey for the year, instead of monthly as before.

 For partially responding hospitals, one or both of two adjustments were made.
 If the hospital provided at least half, but not all, of the expected number
 of abstracts for a given month, the weights of the abstracts actually collected
 for that month were inflated to account for the missing abstracts.  If fewer
 than half of the expected number of abstracts were provided, the weights of
 the abstracts provided were inflated by a factor of two, then a second
 adjustment was made to account for the excess nonresponse.  In the second
 the hospital's respondent months were inflated by ratios that varied by
 category of first-listed ICD-9-CM diagnostic code.  This adjustment ratio
 was based on the hospital's month(s) of nonresponse and the month-by-month
 distributions of first-listed diagnostic groups among discharges from hospitals
 which responded for all twelve months.  The ratio accounts for the
 seasonality in the occurrence of the first-listed diagnostic groups for
 annual statistics, but not for partial year estimates.  As a result
 monthly and seasonal estimates may be skewed.  While the effect is believed
 to be small, it is recommended that partial year estimates NOT be produced.
 In the 1992 NHDS, 87 percent of the 494 responding hospitals provided data
 for all twelve months, and 91 percent provided at least 9 months of data.

 Diagnosis-Related Groups (DRGs):  Many users of the NHDS data tapes have
 expressed an interest in converting the data to DRGs.  This has been done
 using DRG Grouper Programs obtained from the Health Care Financing
 Administration.  The DRGs and the DRG Grouper Programs were developed
 outside of the National Center for Health Statistics; any questions
 about DRGs, other than specific questions about how they relate to NHDS data,
 should be addressed elsewhere.

 Questions:  Questions concerning data on the tape should be directed to
 Maria Owings, Ph.D., Hospital Care Statistics Branch, Division of Health
 Care Statistics, National Center for Health Statistics, Presidential
 Building, Room 956, 6525 Belcrest Road, Hyattsville, Maryland  20782,
 (301)-436-7125.

REFERENCES



 1 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. l000, Series  2-No. 39.  Public Health Service.
   Washington.  U.S. Government Printing Office, Sept. l970.

 2 SMG Hospital Marketing Group, Inc. 1989. Hospital Market Database.
   Healthcare Information Specialists, 1342 North LaSalle Drive, Chicago,
   Illinois.

 3 National Center for Health Statistics:  International Classification of
   Diseases, 9th Revision, Clinical Modification.  DHHS Pub. No. (PHS) 80-l260.
   Public Health Service.  Washington. U.S. Government Printing Office, Sept.
   l980.

 4 Office of the Secretary, Department of Health and Human Services:  Health
   Information Policy Council: 1984 Revision of the Uniform Hospital Discharge
   Data Set.  Federal Register, Volume 50, No. 147. July 31, 1985.

 5 Shah, B.V. 1981.  SESUDAAN:  Standard Errors Program for Computing of
   Standardized Rates from Sample Survey Data.  Research Triangle Institute.
   Research Triangle Park, N.C.

TECHNICAL DESCRIPTION OF TAPE



 Number of Reels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l
 Number of Recording Tracks . . . . . . . . . . . . . . . . . . . . . . . .9
 Density (bpi). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6250
 Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EBCDIC
 Parity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Odd
 Record Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205
 Block Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20,500
 Number of Records. . . . . . . . . . . . . . . . . . . . . . . . . .274,273


RECORD LAYOUT

 TAPE RECORD FORMAT

 This section provides detailed information for each sampled record on the
 tape, with a description of each item included in the record. Data elements
 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 or from automated sources.  The SMG
 Hospital Market Tape and the hospital interview are alternate sources of
 data; some other items are computer generated.

                    NATIONAL HOSPITAL DISCHARGE SURVEY
                     l992 OUTLINE OF ITEMS AND CODES
          ARRANGED BY LOCATION IN THE FINAL MEDICAL TAPE RECORD

 Item         Tape    Number of
 Number      Location Positions  Item Description and Codes

               1-2       2      Blank

       1        3        l      Discharge Status Recode

                                1:  Alive
                                2:  Dead
                                3:  Not Stated

              4-29      26      Blank

       2      30-33      4      Age

                                  Units        Number
                                (Location 33)(Location 30-32)

                                1:  Years    001-124
                                2:  Months   001-011
                                3:  Days     000-031

       3       34        1      Sex

                                1:    Male
                                2:    Female

               35        1      Blank

       4       36        1      Marital Status

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

       5    37-41      5     Date of Admission

      5.1   37-38      2     Month of Admission

                             01: January through
                             12: December

      5.2   39-40      2     Day of Admission

                             01-31

      5.3    41        1     Year of Admission

                             1:  1991
                             2:  1992

       6    42-46      5     Date of Discharge

      6.1   42-43      2     Month of Discharge

                             01: January through
                             12: December

      6.2   44-45      2     Day of Discharge

                             01-31

      6.3    46        1     Year of Discharge

                             2:  1992
                             3:  1993

       7     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, Disposition Not Stated
                             6:  Dead
                             7:  Status Not Stated Item Tape Number of

             48        1     Blank

       8     49        1     Age Recode

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

       9     50        1     Number of Diagnostic Codes Recorded

                             1 - Minimum
                             7 - Maximum

      10     51        1     Number of Surgical Codes Recorded

                             0 - Minimum
                             4 - Maximum

      11    52-56      5     Date of Surgery #3

     11.1   52-53      2     Month of Surgery

                             01-12

     11.2   54-55      2     Day of Surgery

                             01-31

     11.3    56        1     Year of Surgery

                             1:  1991
                             2:  1992
                             3:  1993

      12    57-61      5     Date of Surgery #4

                             Same format as above (52-56)

            62-77     16     Blank

      13    78-81      4     Length of Stay in Days

                             This item was generated by the computer on the
                             basis of date of admission and date of discharge.

      14    82-83      2     Length of Stay Recode #1 (Computer Generated)

                             00: 00 Days
                             01: 01 Days
                              -  -
                              -  -
                              -  -
                             31: 31 Days and Over


      15    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

      16     86        1     Race

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

      17     87        1     Marital Status Recode (Computer Generated)

                             1:  Married
                             2:  Not Married
                             3:  Not Stated

      18     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      2     Blank

      19     91        1     Geographic Region

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

            92-98      7     Blank

      20     99        1     Number of Beds Recode (Interview)

                             1:  6-99 Beds
                             2:  100-199 Beds
                             3:  200-299 Beds
                             4:  300-499 Beds
                             5:  500 Beds or more

      21     100       1     Hospital Ownership (Interview)

                             1:  Proprietary
                             2:  Government
                             3:  Not for profit

      22   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     6     Blank

      23   111-115     5     Weight

                             Final Adjusted Weight (whole number)
                             (see pg. 14 How to Use Data Tape)

           116-130    15     Blank

      24   131-136     6     Expected Source(s) of Payment

     24.1    131       1     Principal
     24.2    132       1     Other
     24.3    133       1     Secondary
     24.4    134       1     Secondary

                             Code for Source of Payment

                             1:  Worker's Compensation
                             2:  Medicare
                             3:  Medicaid
                             4:  Not Stated
                             5:  Other Government Payments
                             6:  Blue Cross
                             7:  Other Private/Commercial Insurance
                             8:  Self-Pay
                             9:  No Charge
                             0:  Other

      25   137-141     5     Date of Surgery #1

                             Same format as above (52-56)

      26   142-146     5     Date of Surgery #2

                             Same format as above (52-56)

           147-148     2     Blank

      27   149-183    35     Diagnostic Codes** (Five-Digit Codes)

     27.1  149-153     5     Diagnosis No. 1
     27.2  154-158     5     Diagnosis No. 2
     27.3  159-163     5     Diagnosis No. 3
     27.4  164-168     5     Diagnosis No. 4
     27.5  169-173     5     Diagnosis No. 5
     27.6  174-178     5     Diagnosis No. 6
     27.7  179-183     5     Diagnosis No. 7

      28   184-199    16     Surgical Codes** (Four-Digit Codes)

     28.1  184-187     4     Procedure No. 1
     28.2  188-191     4     Procedure No. 2
     28.3  192-195     4     Procedure No. 3
     28.4  196-199     4     Procedure No. 4

             200       l     Blank

      29   201-203     3     DRGs - - Grouper Version 9.0

 If you have any suggestions about how to better provide NHDS data by DRGs
 to NHDS data users, please write to Maria Owings, NCHS, Presidential Bldg.
 Room 952-956, 6525 Belcrest Road, Hyattsville, MD  20782.  Your assistance
 is greatly appreciated.

 **Codes are in compliance with the ICD-9-CM.  There is an implied decimal
 between positions 3 and 4 for each diagnostic code, (with the exception of
 E-codes, where the implied decimal is between 4 and 5) and between positions
 2 and 3 for each procedure code.  All coding is consistent with the ICD-9-CM
 and the addendum effective as of October 1991.  For the last three months of
 the data year, coding which was based on the October 1992 addendum was
 converted back to the previous code assignment. This was done in order to
 provide consistency and allow correct annual estimation.

APPENDICES
 Appendix A

 DEFINITION OF TERMS

 Terms relating to hospitals and hospitalization

 Hospitals:  Short-stay hospitals or hospitals whose specialty is general
 (medical or surgical), or children's general.  Hospitals must have 6 beds
 or more staffed for patients use.  Federal hospitals and hospital units of
 institutions are not included.

 Type of ownership of hospital:  The type of organization that controls and
 operates the hospital.  Hospitals are grouped as follows:

        Not for Profit:  Hospitals operated by a church or another
                         not-for-profit organization.

        Government:  Hospitals operated by State or local government.

        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, or by
 birth.

 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.  The terms
 "discharges" and "patients discharged" are used synonymously.

 Discharge rate:  The ratio of the number of hospital discharges during the
 year to the number of persons in the civilian resident population on July 1
 of that year.

 Days of care:  The total number of patient days accumulated at time of
 discharge by patients discharged from short-stay hospitals during a year.  A
 stay of less than 1 day (patient admission and discharge on the same day) is
 counted as 1 day in the summation of total days of care.  For patients
 admitted and discharged on different days, the number of days of care i
 counting all days from (and including) the date of admission to (but not
 including) the date of discharge.

 Rate of days of care:  The ratio of the number of patient days accumulated
 at time of discharge to the number of persons in the civilian resident
 population on July 1 of that year.

 Average length of stay:  The total number of days of care accumulated at
 time of discharge by patients discharged during the year, divided by the
 number of patients discharged.  Terms relating to diagnoses and proce

 Discharge diagnoses:  One or more diseases or injuries (or some factor that
 influences health status and contact with health services that is not itself
 a current illness or injury) listed by the attending physician on the
 medical record of a patient.  In the NHDS, discharge (or final)
 diagnoses listed on the face sheet (summary sheet) of the medical record
 are transcribed in the order listed.  Each sample discharge is assigned a
 maximum of seven five-digit codes according to ICD-9-CM (2).

 Principal diagnosis:  The condition established after study to be chiefly
 responsible for occasioning the admission of the patient to the hospital for
 care.

 First-listed diagnosis:  The coded diagnosis identified as the principal
 diagnosis or listed first on the face sheet of the medical record if the
 principal diagnosis cannot be identified. The number of first-listed
 diagnoses is equivalent to the number of discharges.

 Procedure:  One or more surgical or nonsurgical operations, procedures, or
 special treatments listed by the physician on the medical record.  In the
 NHDS, all terms listed on the face sheet (summary sheet) of the medical
 record under the caption "operation," "operative procedures,"
 "operations and/or special treatment," and the like are transcribed in the
 order listed.  A maximum of four procedures are coded.

 Rate of procedures:  The ratio of the number of all-listed procedures during
 a year to the number of persons in the civilian resident population on July 1
 of that year determines the rate of procedures.

 Demographic terms

 Age:  Refers to the age of the patient on the birthday prior to admission to
 the hospital inpatient service.

 Population:  Civilian population is the resident population excluding members
 of the Armed Forces.

 Geographic regions:  Hospitals are classified by location in one of the four
 geographic regions of the United States corresponding to those used
 by the U.S. Bureau of the Census:

 GEOGRAPHIC REGION                 STATES INCLUDED

 Northeast . . . . . . . . . . . . Maine, New Hampshire, Vermont
                                   Massachusetts, Rhode Island,
                                   Connecticut, New York, New Jersey,
                                   and Pennsylvania

 Midwest . . . . . . . . . . . . . Michigan, Ohio, Illinois, Indiana,
                                   Wisconsin, Minnesota, Iowa,
                                   Missouri, North Dakota,
                                   South Dakota, Nebraska,
                                   and Kansas

 South . . . . . . . . . . . . . . Delaware, Maryland, District of
                                   Columbia, Virginia, West Virginia,
                                   North Carolina, South Carolina, Georgia,
                                   Florida, Kentucky, Tennessee, Alabama,
                                   Mississippi, Arkansas, Louisiana,
                                   Oklahoma, and Texas

 West. . . . . . . . . . . . . . . Montana, Idaho, Wyoming,
                                   Colorado, New Mexico, Arizona,
                                   Utah, Nevada, Washington, Oregon,
                                   California, Hawaii, and Alaska

Appendix B

 ICD-9-CM ADDENDA

   Since 1979, the International Classification of Diseases, 9th Revision,
 Clinical Modification, has been used for coding NHDS data.  However, since
 1986, this classification system has undergone annual updating.  Assignment
 of new diagnostic and procedure codes,  fourth and fifth digit expansion of
 codes, as well as code deletions, are contained in addenda  developed by the
 ICD-9-CM Coordination and Maintenance Committee and approved by the
 Director of NCHS and the Administrator of the Health Care Financing
 Administration.  Addenda to the ICD-9-CM become effective on October 1 of
 the calendar year and have been released  for 1986 through 1992.

   As described earlier, the 1992 NHDS involved two data collection modes:
 manual and  abstract.  All data collected manually were coded using the third
 edition of the ICD-9-CM,  which includes the addenda for 1986 through 1991.
 Data collected via abstract service were coded using two different ICD-9-CM
 revisions.  For the first 9 months of 1992, the ICD-9-CM with the addenda of
 October 1, 1986-91 was used; for the last 3 months the October 1  addendum
 was used.  Therefore, data provided by automated systems for the last three
 months of 1992 were converted back to the code assignment under the October
 1991 addendum.  This was done in order to provide consistency and allow
 correct annual estimation.

   In order to assist users in data retrieval, a conversion table is provided
 that shows for each new code, its date of introduction and the previously
 assigned code equivalent, which had been used for reporting the selected
 diagnosis or procedure prior to issuance of the new code.

Diagnosis Codes
                              DIAGNOSIS CODES

       Current Code(s)        Effective       Previous Code(s)
         Assignment           October 1          Assignment

         042.0-042.9            1986               279.19
         043.0-043.9            1986               279.19
         044.0-044.9            1986               279.19

        070.20-070.21           1991                070.2
        070.30-070.31           1991                070.3
        070.41-070.49           1991                070.4
        070.51-070.59           1991                070.5

       088.81, 088.89           1989                088.8

         176.0-176.9            1991             173.0-173.9

           203.00               1991                203.0
           203.01               1991                V10.79
           203.10               1991                203.1
           203.11               1991                V10.79
           203.80               1991                203.8
           203.81               1991                V10.79

           204.00               1991                204.0
           204.01               1991                V10.61
           204.10               1991                204.1
           204.11               1991                V10.61
           204.20               1991                204.2
           204.21               1991                V10.61
           204.80               1991                204.8
           204.81               1991                V10.61
           204.90               1991                204.9
           204.91               1991                V10.61

           205.00               1991                205.0
           205.01               1991                V10.62
           205.10               1991                205.1
           205.11               1991                V10.62
           205.20               1991                205.2
           205.21               1991                V10.62
           205.30               1991                205.3
           205.31               1991                V10.62
           205.80               1991                205.8
           205.81               1991                V10.62

           205.90               1991               205.9
           205.91               1991               V10.62

           206.00               1991               206.0
           206.01               1991               V10.63
           206.10               1991               206.1
           206.11               1991               V10.63
           206.20               1991               206.2
           206.21               1991               V10.63
           206.80               1991               206.8
           206.81               1991               V10.63
           206.90               1991               206.9
           206.91               1991               V10.63

           207.00               1991               207.0
           207.01               1991               V10.69
           207.10               1991               207.1
           207.11               1991               V10.69
           207.20               1991               207.2
           207.21               1991               V10.69
           207.80               1991               207.8
           207.81               1991               V10.69

           208.00               1991               208.0
           208.01               1991               V10.60
           208.10               1991               208.1

           208.11               1991               V10.60
           208.20               1991               208.2
           208.21               1991               V10.60
           208.80               1991               208.8
           208.81               1991               V10.60
           208.90               1991               208.9
           208.91               1991               V10.60

        237.70-237.72           1990               237.7

        345.00-345.01           1989               345.0
        345.10-345.11           1989               345.1
        345.40-345.41           1989               345.4
        345.50-345.51           1989               345.5

        345.60-345.61           1989                345.6
        345.70-345.71           1989                345.7
        345.80-345.81           1989                345.8
        345.90-345.91           1989                345.9
           374.87               1990               374.89

        403.00-403.01           1989                403.0
        403.10-403.11           1989                403.1
        403.90-403.91           1989                403.9
        404.00-404.03           1989                404.0
        404.10-404.13           1989                404.1
        404.90-404.93           1989                404.9

        410.00-410.02           1989                410.0
        410.10-410.12           1989                410.1
        410.20-410.22           1989                410.2
        410.30-410.32           1989                410.3
        410.40-410.42           1989                410.4
        410.50-410.52           1989                410.5
        410.60-410.62           1989                410.6
        410.70-410.72           1989                410.7
        410.80-410.82           1989                410.8
        410.90-410.92           1989                410.9

           411.81               1989                410.9
           411.89               1989                411.8

           429.71               1989             410.0-410.9
           429.79               1989             410.0-410.9

    446.20-446.21,446.29        1990                446.2

        491.20-491.21           1991                491.2

           493.20               1989               493.90
           493.21               1989               493.91

           518.81               1987                799.1
        518.82-518.89           1987                518.8

        524.60-524.69           1991                524.6

        535.00-535.01           1991                535.0
        535.10-535.11           1991                535.1
        535.20-535.21           1991                535.2
        535.30-535.31           1991                535.3
        535.40-535.41           1991                535.4
        535.50-535.51           1991                535.5
        535.60-535.61           1991                535.6

           537.82               1990               537.89
           537.83               1991               537.82

           562.02               1991               562.00
           562.03               1991               562.01
           562.12               1991               562.10
           562.13               1991               562.11

           569.84               1990                557.1
           569.85               1991               569.84

            645.0               1991                 645

    651.30-651.31,651.33        1989        651.00-651.01,651.03
    651.40-651.41,651.43        1989        651.10-651.11,651.13
    651.50-651.51,651.53        1989        651.20-651.21,651.23
    651.60-651.61,651.63        1989        651.80-651.81,651.83


    654.20-654.21,654.23        1990             654.2,654.9
        654.90-651.94           1990             654.2,654.9

            657.0               1991                 657

            670.0               1991                 670
            672.0               1991                 672

         702.0-702.8            1991                 702

    753.10-753.17,753.19        1990                753.1
        759.81-759.89           1989                759.8

           760.75               1991               760.79

        764.00-764.09           1988                764.0
        764.10-764.19           1988                764.1
        764.20-764.29           1988                764.2
        764.90-764.99           1988                764.9

        765.00-765.09           1988                765.0
        765.10-765.19           1988                765.1

            795.8               1986                795.7

        996.51-996.59           1987                996.5
        996.60-996.69           1989                996.6
        996.70-996.79           1989                996.7
        996.80-996.89           1987                996.8
           996.85               1990                999.8

        V30.00-V30.01           1989                V30.0
        V31.00-V31.01           1989                V31.0
        V32.00-V32.01           1989                V32.0
        V33.00-V33.01           1989                V33.0
        V34.00-V34.01           1989                V34.0
        V35.00-V35.01           1989                V35.0
        V36.00-V36:01           1989                V36.0
        V37.00-V37.01           1989                V37.0
        V39.00-V39.0l           1989                V39.0


                              PROCEDURE CODES

       Current Code(s)        Effective       Previous Code(s)
         Assignment           October 1          Assignment

            03.90               1987                03.99
                                           (Insertion of Catheter)

            11.75               1989                11.79
            11.76               1989                11.62

         20.96-20.98            1986                20.95

            22.12               1988                22.11

            26.12               1988                26.11

            29.31               1991                83.02
            29.32               1991                29.3
            29.33               1991                29.3
            29.39               1991                29.3

            31.45               1988             31.43-31.44

            31.95               1989                31.75

            32.01               1989                32.0
            32.09               1989                32.0

            32.28               1989                32.29

            33.27               1987            33.22 + 33.27
            33.28               1987                33.27
            33.29               1987             33.28-33.29

            33.6                1990             33.5 + 37.5

            35.84               1988                35.82

            35.96               1986                35.03

         36.00-36.03            1986                36.0
            36.04               1986                39.97
            36.05               1987                36.01
            36.05               1986           36.01*,36.02
            36.09               1991        36.00 (Code Deleted)
            36.09               1986                36.0

  *Before October 1986 contents of current code 36.05 would have been
   assigned to 36.0.

     37.26-37.27                1988                37.29

          37.34                 1988                37.33

          37.70  (Leads Only)   1987(Leads/Device)  37.70
     37.71-37.72 (Leads Only)   1987(Leads/Device)  37.74
          37.73  (Leads Only)   1987(Leads/Device)  37.73
          37.74  (Leads Only)   1987(Leads/Device)  37.76
          37.75  (Leads Only)   1987(Leads/Device)  37.89
          37.76  (Leads Only)   1987(Leads/Device)  37.81
          37.77  (Leads Only)   1987(Leads/Device)37.83-37.84

          37.78                 1987             37.71-37.72
          37.79                 1987                86.09

          37.80  (Device only)  1987(Leads/Device)37.73-37.77
          37.81  (Device only)  1987(Leads/Device)37.73-37.77
          37.82  (Device only)  1987(Leads/Device)37.73-37.77
          37.83  (Device only)  1987(Leads/Device)37.73-37.77
       37.85-37.87              1987                37.85
          37.89                 1987             37.86+37.89

       37.94-37.98              1986                37.99

          38.22                 1986                38.29

          38.44(Abdominal Aorta Only)    1986       38.44 (Entire Aorta)
          38.45(Thoracic Aorta Added)    1986       38.44-38.45

          38.95                 1989                38.93

          39.28                 1991                39.29

          39.65                 1988                39.61
          39.66                 1990                39.65

       41.00-41.03              1988                41.0

          42.25                 1988                42.24
          42.33                 1989             42.32,42.39
          42.33                 1990                42.91

        43.11                    1989               43.1
        43.19                    1989             43.1,43.2


        43.41                    1989            43.41,43.49

        44.21                    1986               44.2
        44.22                    1986               44.99
        44.29                    1986               44.2

        44.43                    1989           43.49, 45.32

        44.44                    1989               38.86
        44.49                    1989               43.0

     44.93-44.94                 1986               44.99

        45.16                    1988     45.14 (45.15 before 1987)

        45.30                    1989            45.31,45.32

        45.42                    1988               45.41
        45.43                    1989               45.49

        45.75                    1988             48.66 (Code Deleted)
       (Hartmann Resection Added)


        45.95                    1987               45.93

        46.32                    1989               46.39

        46.85                    1989               46.99


        49.31                    1989               49.3
        49.39                    1989               49.3

            51.10               1989                51.9 51.97
            51.11               1989             51.11,51.97
            51.14               1989                51.12
            51.15               1989                51.97

            51.22               1991     51.21 (Code Deleted),51.22

            51.23               1991                51.22

            51.64               1989                51.69

         51.84-51.88            1989                51.97

            51.97               1986        52.91,51.99, or 51.82
            51.98               1986                51.99


            52.13               1989             51.97,52.91
            52.14               1989                52.11
            52.21               1989                52.2
            52.22               1989                52.2

            52.93               1989            52.93 + 52.91
            52.94               1989                52.09
            52.97               1989                52.91
            52.98               1989                52.91
            52.99               1989          52.93,52.94,52.99

            54.24               1987                54.23

         55.03-55.04            1986                55.02

         56.33-56.34            1987                56.33
            56.35               1987                45.12

         57.17-57.18            1989                57.21
            57.22               1989             57.22,57.82
            58.31               1990                58.3
            58.39               1990                58.3

            58.93               1986                57.99

            59.96               1986                59.95

            60.95               1991                60.99

            64.97               1986                64.95

            68.15               1987                68.14
            68.16               1987                68.13

            77.56               1989          77.89,78.49,81.18
            77.57               1989       77.89,80.48,81.18,83.85
            77.58               1989             77.59,81.18

            78.10               1991                78.40
            78.11               1991                78.41
            78.12               1991                78.42
            78.13               1991                78.43
            78.14               1991                78.44
            78.15               1991                78.45
            78.16               1991                78.46
            78.17               1991                78.47
            78.18               1991                78.48
            78.19               1991                78.49
            78.20               1991          78.10,78.20,78.30
            78.21               1991             78.11,78.31
            78.22               1991          78.12,78.22,78.32
            78.23               1991          78.13,78.23,78.33
            78.24               1991             78.14,78.34
            78.25               1991          78.15,78.25,78.35
            78.27               1991          78.17,78.27,78.37
            78.28               1991             78.18,78.38
            78.29               1991    78.11,78.16,78.19,78.29,78.39
            78.39               1991                78.31

           78.90*               1987                78.40
           78.91*               1987                78.41
           78.92*               1987                78.42
           78.93*               1987                78.43
           78.94*               1987                78.44
           78.95*               1987                78.45
           78.96*               1987                78.46

           78.97*               1987                78.47
           78.98*               1987                78.48
           78.99*               1987                78.49

         80.50-80.59            1986                80.5

            81.03               1989                81.02
         81.04-81.05            1989          81.03,81.04,81.05

         81.06-81.07            1989             81.06,81.07
            81.08               1989          81.06,81.07,81.08
            81.09               1989                81.08

            81.40               1989                81.69

            81.51               1989             81.51,81.59
            81.52               1989       81.61,81.62,81.63,81.64
            81.53               1989      81.51,81.59,81.61,81.62,
                                                 81.63,81.64

         81.54-81.55            1989                81.41
            81.56               1989                81.48
            81.57               1989             81.31,81.39
            81.59               1989                81.39

            81.72               1989                81.79
         81.73-81.74            1989                81.86
            81.75               1989                81.87
            81.79               1989             81.79,81.87
            81.80               1989                81.81

            85.95               1987                85.99
            85.96               1987                85.99
            86.06               1987                86.09
            86.07               1990                86.09

            86.27               1986             86.22-86.23
            86.28               1988                86.22
            86.93               1987                86.89

       *Codes 78.90-78.99 were retitled as "Insertion of bone growth
        stimulator" in October 1987; the previous contents of codes
        78.90-78.99 were reassigned to codes 78.40-78.49.

           88.90                1986                88.39
            88.91               1986                89.15
            88.92               1986                89.39
            88.93               1986                89.15
            88.94               1986                89.39
            88.95               1986                89.29
            88.97               1989                88.99
            88.98               1989                88.90
            88.99               1986                89.39

            89.10               1989                89.15
         89.17-89.18            1988                89.15
            89.19               1989                89.15

            89.50               1991                89.54

            93.90               1988                93.92

         94.61-94.69            1989                94.25

            96.6                1986                96.35

            96.70               1991        93.92 (Code Deleted)
            96.71               1991        93.92 (Code Deleted)
            96.72               1991        93.92 (Code Deleted)

            97.05               1989                51.97

         98.51-98.52            1989        59.96 (Code Deleted)
            98.59               1989        59.96 (Code Deleted)

            99.15               1986                99.29
        99.71-99.79*            1988                99.07

            99.85               1987                93.35
            99.86               1987                93.39
            99.88               1988                99.83


       **Codes 99.71-99.79 were deleted in October 1987; their contents
       were not transferred elsewhere.  In the October 1988 revision,
       codes 99.71-99.79 were reclassified as "Therapeutic apheresis."

Appendix C

      Civilian Population* by Sex, Age, Geographic Region and Race:
                       United States, July l, l992

           (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          253,497          123,081          130,416

  Northeast         51,026           24,533           26,494
  Midwest           60,586           29,410           31,176
  South             87,299           42,088           45,211
  West              54,586           27,051           27,535

  White            211,686          103,236          108,451
  Black             31,326           14,732           16,594
  All other         10,485            5,114            5,372

 Under 15 years     55,962           28,653           27,309

  Under 1 year       3,984            2,039            1,945
  1-4 years         15,528            7,947            7,581
  5-14 years        36,450           18,667           17,783

  Northeast         10,361            5,307            5,054
  Midwest           13,422            6,875            6,547
  South             19,251            9,846            9,404
  West              12,929            6,624            6,304

  White             44,581           22,883           21,698
  Black              8,663            4,385            4,277
  All other          2,719            1,385            1,334


 Age, geographic
 region and race       Both sexes          Male           Female


                                   Population in thousands

 15-44 years            116,946           58,110           58,836

       15-24 years       35,500           17,915           17,586
       25-34 years       41,842           20,699           21,143
       35-44 years       39,604           19,496           20,108

       Northeast         23,342           11,561           11,782
       Midwest           27,641           13,750           13,892
       South             40,106           19,705           20,401
       West              25,856           13,094           12,762

       White             96,310           48,273           48,037
       Black             15,231            7,192            8,039
       All other          5,406            2,645            2,761


 45-64 years             48,304           23,274           25,031

       45-54 years       27,379           13,362           14,017
       55-64 years       20,926            9,912           11,014

       Northeast         10,198            4,862            5,335
       Midwest           11,561            5,596            5,965
       South             16,787            8,030            8,757
       West               9,758            4,786            4,972

       White             41,772           20,325           21,446
       Black              4,835            2,154            2,681
       All other          1,698              794              903


 Age, geographic
 region and race       Both sexes            Male           Female


                                   Population in thousands

 65 years and over       32,285           13,045           19,240

       65-74 years       18,461            8,125           10,336
       75-84 years       10,565            4,010            6,555
       85 years and over  3,259              909            2,349

       Northeast          7,125            2,803            4,323
       Midwest            7,962            3,189            4,773
       South             11,155            4,506            6,648
       West               6,043            2,546            3,496

       White             29,024           11,754           17,269
       Black              2,598            1,001            1,597
       All other            663              289              374


 *The NHDS used the civilian noninstitutional population to calculate hospital
   utilization rates from 1965 through 1980.  Beginning in 1981, the civilian
   resident population has been 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 1992 rates using the civilian
   resident population.

  Civilian population of the United States by age, sex, and region:
                           July 1, 1992
                      Estimates in thousands
 -----------------------------------------------------------------------------
                 U.S.                Northeast                Midwest
 Age   Total   Male   Female    Total   Male   Female    Total  Male   Female
 ------------------------------------------------------------------------------
 All 253,497  123,081 130,416   51,026   24,533  26,494  60,586 29,410  31,176

  0-14 55,962  28,653  27,309   10,361   5,307   5,054   13,422  6,875   6,547
  0-4  19,512   9,986   9,526    3,702   1,896   1,806    4,493  2,299   2,193
  5-9  18,349   9,396   8,954    3,387   1,736   1,650    4,441  2,276   2,166
 10-14 18,100   9,271   8,829    3,272   1,675   1,598    4,488  2,300   2,187

 15-44 116,946 58,110  58,836   23,342   11,561  11,782  27,641 13,750  13,892
 15-19  16,962  8,663   8,299    3,166    1,612   1,554   4,160  2,125   2,035
 20-24  18,538  9,251   9,287    3,737    1,863   1,874   4,427  2,207   2,220
 25-29  19,841  9,834  10,007    4,009    1,985   2,024   4,550  2,248   2,301
 30-34  22,001 10,865  11,136    4,435    2,187   2,248   5,136  2,537   2,600
 35-39  20,899 10,301  10,598    4,192    2,062   2,130   4,937  2,446   2,491
 40-44  18,705  9,195   9,510    3,803    1,851   1,952   4,430  2,186   2,244

 45-64  48,304 23,274  25,031  10,198    4,862   5,335   11,561  5,596   5,965
 45-49  15,329  7,510   7,819   3,193    1,544   1,649    3,589  1,761   1,828
 50-54  12,050  5,852   6,198   2,511    1,205   1,306    2,895  1,409   1,486
 55-59  10,485  5,021   5,464   2,212    1,050   1,161    2,538  1,220   1,317
 60-64  10,440  4,890   5,550   2,283    1,063   1,220    2,539  1,205   1,334

 65+    32,285 13,045  19,240  7,125     2,803   4,323   7,962   3,189   4,773
 65-69   9,977  4,475   5,503  2,173       962   1,211   2,403   1,092   1,312
 70-74   8,483  3,651   4,833  1,874       788   1,086   2,030     867   1,163
 75-79   6,415  2,553   3,862  1,422       548     874   1,595     628     967
 80-84   4,150  1,457   2,693    922       310     612   1,052     363     689
 85+     3,259    909   2,349    734       194     540     881     239     642

 -----------------------------------------------------------------------------
                  South                        West
 Age   Total    Male    Female          Total    Male     Female
 -----------------------------------------------------------------------------
 All   87,299  42,088   45,211          54,586   27,051   27,535

 0-14  19,251   9,846    9,404          12,929    6,624    6,304
 0-4    6,633   3,393    3,241           4,684    2,398    2,286
 5-9    6,305   3,224    3,082           4,216    2,160    2,056
 10-14  6,312   3,230    3,082           4,028    2,066    1,962

 15-44  40,106 19,705   20,401          25,856    13,094   12,762
 15-19   6,018  3,058    2,959           3,619     1,868    1,750
 20-24   6,423  3,149    3,274           3,950     2,032    1,919
 25-29   6,782  3,314    3,468           4,501     2,287    2,214
 30-34   7,441  3,632    3,809           4,988     2,509    2,479
 35-39   7,077  3,445    3,632           4,692     2,348    2,345
 40-44   6,366  3,107    3,258           4,106     2,050    2,056

 45-64  16,787  8,030    8,757           9,758     4,785    4,973
 45-49   5,288  2,581    2,707           3,258     1,624    1,635
 50-54   4,185  2,021    2,165           2,459     1,218    1,241
 55-59   3,678  1,746    1,933           2,058     1,005    1,053
 60-64   3,636  1,683    1,953           1,983       939    1,043

 65+    11,155  4,506    6,648           6,043     2,546    3,496
 65-69   3,490  1,554    1,935           1,911       867    1,045
 70-74   2,961  1,273    1,688           1,617       722      896
 75-79   2,205    874    1,331           1,193       503      690
 80-84   1,430    501      928             747       283      464
 85+     1,070    304      766             574       173      401



 Civilian Population of the United States, July 1, 1992
 Estimates, by age, sex, and race


 ----------------------------------------------------------------------
 Age               All races                   White
        Total      Male      Female      Total     Male      Female
 ----------------------------------------------------------------------
                   Civilian Population in thousands

 Total  253,497    123,081   130,416     211,686   103,236   108,451

 0-4     19,512      9,986     9,526      15,454     7,928     7,526
 0        3,984      2,039     1,945       3,140     1,611     1,529
 1        3,978      2,036     1,943       3,157     1,619     1,538
 2        3,959      2,027     1,932       3,146     1,614     1,532
 3        3,813      1,951     1,861       3,016     1,547     1,469
 4        3,778      1,933     1,845       2,995     1,536     1,459

 5-9     18,349      9,396     8,954      14,688     7,538     7,150
 5        3,722      1,906     1,816       2,967     1,523     1,445
 6        3,705      1,897     1,808       2,973     1,525     1,448
 7        3,697      1,891     1,805       2,967     1,522     1,445
 8        3,450      1,766     1,684       2,764     1,419     1,346
 9        3,776      1,936     1,840       3,017     1,550     1,467

 10-14    18,100     9,271     8,829      14,438     7,416     7,022
 10        3,795     1,946     1,849       3,035     1,560     1,474
 11        3,665     1,877     1,788       2,934     1,507     1,427
 12        3,670     1,878     1,792       2,917     1,497     1,420
 13        3,526     1,804     1,722       2,807     1,441     1,367
 14        3,443     1,765     1,678       2,746     1,412     1,335

 15-19    16,962     8,663     8,299      13,532     6,929     6,603
 15        3,448     1,769     1,679       2,741     1,410     1,331
 16        3,317     1,707     1,610       2,649     1,366     1,283
 17        3,437     1,773     1,664       2,749     1,420     1,328
 18        3,273     1,666     1,607       2,615     1,335     1,280
 19        3,487     1,748     1,739       2,777     1,398     1,379

 20-24    18,538     9,251     9,287      15,032     7,546     7,486
 20        3,652     1,823     1,830       2,929     1,468     1,462
 21        3,860     1,923     1,937       3,110     1,555     1,555
 22        3,759     1,877     1,882       3,064     1,539     1,525
 23        3,621     1,809     1,812       2,960     1,490     1,471
 24        3,645     1,819     1,826       2,969     1,495     1,474

 25-29    19,841     9,834     10,00     716,256     8,133     8,123
 25        3,684     1,833      1,851      3,009     1,510     1,498
 26        3,762     1,862      1,900      3,064     1,530     1,534
 27        4,015     1,990      2,025      3,289     1,646     1,643
 28        3,947     1,952      1,995      3,257     1,626     1,631
 29        4,433     2,198      2,235      3,637     1,821     1,816

 30-34    22,001    10,865     11,136     18,264     9,121     9,143
 30        4,426     2,188      2,238      3,667     1,832     1,835
 31        4,346     2,144      2,202      3,607     1,800     1,808
 32        4,398     2,172      2,226      3,647     1,822     1,826
 33        4,328     2,128      2,200      3,601     1,792     1,809
 34        4,503     2,233      2,270      3,741     1,875     1,866

 35-39    20,899    10,301     10,598     17,448     8,698     8,750
 35        4,456     2,204      2,252      3,708     1,853     1,855
 36        4,194     2,064      2,130      3,497     1,741     1,756
 37        4,206     2,073      2,133      3,504     1,747     1,757
 38        3,861     1,895      1,966      3,239     1,608     1,631
 39        4,181     2,065      2,116      3,500     1,748     1,751

 40-44    18,705     9,195      9,510     15,777     7,845     7,932
 40        3,983     1,961      2,022      3,350     1,669     1,681
 41        3,730     1,830      1,900      3,128     1,553     1,574
 42        3,694     1,816      1,878      3,105     1,544     1,562
 43        3,583     1,752      1,831      3,019     1,494     1,526
 44        3,715     1,836      1,878      3,174     1,585     1,590

 45-49    15,329     7,510      7,819     13,197     6,528     6,669
 45        3,899     1,922      1,977      3,389     1,686     1,703
 46        2,751     1,346      1,405      2,349     1,161     1,187
 47        2,845     1,389      1,456      2,417     1,192     1,225
 48        2,707     1,319      1,388      2,339     1,150     1,189
 49        3,126     1,535      1,591      2,703     1,338     1,365

 50-54    12,050     5,852      6,198     10,348     5,073     5,275
 50        2,660     1,297      1,363      2,281     1,123     1,159
 51        2,434     1,185      1,250      2,093     1,028     1,065
 52        2,327     1,130      1,197      1,996       978     1,018
 53        2,315     1,121      1,194      1,993       974     1,019
 54        2,313     1,119      1,195      1,985       969     1,015

 55-59    10,485     5,021      5,464      9,072     4,390     4,682
 55        2,137     1,027      1,110      1,830       888       942
 56        2,160     1,035      1,125      1,868       906       962
 57        2,205     1,057      1,148      1,912       926       986
 58        1,927       921      1,006      1,681       812       870
 59        2,057       981      1,076      1,780       858       922

 60-64  10,440     4,890      5,550        9,154     4,335     4,820
 60      2,026       949      1,077        1,764       835       929
 61      2,075       977      1,098        1,819       866       953
 62      2,085       981      1,103        1,824       869       956
 63      2,081       976      1,104        1,835       870       965
 64      2,175     1,007      1,168        1,913       895     1,018

 65-69   9,977     4,475      5,503        8,847     3,994     4,853
 65      2,085       951      1,135        1,830       842       988
 66      2,020       913      1,108        1,782       810       972
 67      2,034       914      1,120        1,808       819       989
 68      1,931       859      1,072        1,727       773       953
 69      1,907       838      1,069        1,701       750       951

 70-74   8,483     3,651      4,833        7,621     3,298     4,323
 70      1,905       837      1,068        1,705       754       951
 71      1,837       802      1,034        1,650       725       925
 72      1,698       735        962        1,522       663       860
 73      1,561       660        901        1,406       598       809
 74      1,483       616        867        1,338       559       779

 75-79   6,415     2,553      3,862        5,798     2,317     3,481
 75      1,419       584        834        1,281       530       751
 76      1,344       548        796        1,222       500       721
 77      1,283       511        772        1,162       465       697
 78      1,221       474        748        1,104       431       673
 79      1,147       436        712        1,029       390       638

 80-84   4,150     1,457      2,693        3,783     1,325     2,458
 80        996       369        627          907       336       571
 81        907       324        583          825       294       531
 82        820       287        534          747       260       487
 83        752       256        496          689       233       455
 84        676       223        453          615       201       414

 85+     3,259       909      2,349        2,975       821     2,154

 0-14   55,962    28,653     27,309       44,581    22,883    21,698
 15-44 116,946    58,110     58,836       96,310    48,273    48,037
 45-64  48,304    23,274     25,031       41,772    20,325    21,446
 15+19   7,535    94,428    103,107      167,105    80,353    86,753
 45+    80,589    36,319     44,271       70,795    32,080    38,716
 65+    32,285    13,045     19,240       29,024    11,754    17,269
 75+    13,824     4,920      8,904       12,556     4,463     8,093


 ----------------------------------------------------------------------
 Age               Black                       Other races
        Total      Male      Female      Total     Male      Female
 ----------------------------------------------------------------------
 Total  31,326    14,732     16,594     10,485    5,114       5,372

 0-4    3,099      1,568      1,531        959      490         468
 0        640        324        316        204      104         100
 1        623        315        308        198      102          97
 2        623        316        307        190       97          93
 3        613        310        303        184       94          90
 4        601        304        297        182       93          89

 5-9    2,782      1,410      1,372        880      448         432
 5        579        293        286        176       90          86
 6        557        283        275        175       89          86
 7        555        281        275        174       88          86
 8        516        262        255        169       86          84
 9        574        291        282        186       94          91

 10-14  2,782      1,408      1,374        880      447         433
 10       577        293        284        183       93          90
 11       552        279        273        180       92          89
 12       575        291        284        179       90          89
 13       546        276        270        173       88          85
 14       532        269        263        165       84          81

 15-19  2,619      1,319      1,300        811      415         396
 15       544        276        268        163       84          80
 16       509        259        250        159       82          77
 17       524        267        256        165       85          79
 18       503        252        251        155       79          76
 19       540        265        275        170       86          84

 20-24  2,585      1,237      1,349        921      468         453
 20       546        265        281        177       90          87
 21       555        268        288        195      100          95
 22       507        242        265        188       96          92
 23       481        228        253        180       91          88
 24       496        233        263        181       91          90

 25-29  2,641      1,236      1,405        945      465         480
 25       496        233        263        179       89          90
 26       516        242        274        182       90          92
 27       536        251        285        190       93          97
 28       509        237        272        181       88          93
 29       584        273        311        213      104         109

 30-34  2,736      1,261      1,475      1,000      483         517
 30       561        260        301        198       96         101
 31       536        247        289        202       97         105
 32       549        253        296        202       98         105
 33       533        243        289        194       93         101
 34       558        258        299        204       99         105

 35-39  2,525      1,163      1,362        925      439         485
 35       551        256        295        197       95         102
 36       510        234        276        187       89          98
 37       515        236        278        187       89          98
 38       455        209        246        167       78          88
 39       496        229        266        186       88          98

 40-44  2,124        976      1,148        804      375         429
 40       463        212        251        170       80          90
 41       434        198        236        168       79          90
 42       427        197        231        161       75          86
 43       402        184        218        161       74          87
 44       397        185        212        143       67          77

 45-49  1,538        700        838        594      282         312
 45       372        171        201        139       65          74
 46       283        128        155        120       57          63
 47       307        139        168        121       58          63
 48       266        120        146        102       48          53
 49       310        142        168        113       54          58

 50-54  1,256        565        691        446      215         232
 50       279        126        153        100       48          52
 51       249        112        137         93       45          48
 52       243        110        134         87       42          45
 53       240        107        133         82       40          43
 54       245        110        135         84       40          44

 55-59  1,059        467        592        354      165         190
 55       228        102        127         78       37          41
 56       219         95        124         72       34          38
 57       221         97        124         72       34          38
 58       184         81        102         62       28          34
 59       207         91        116         70       31          38

 60-64    982        423        560        304      133         170
 60       199         86        113         63       28          35
 61       194         83        111         62       27          34
 62       199         86        113         62       27          35
 63       188         81        107         58       25          33
 64       202         87        115         59       25          34

 65-69    878        371        507        252      110         143
 65       199         84        115         56       24          32
 66       187         81        105         52       22          30
 67       177         74        103         50       21          28
 68       158         65         92         47       21          26
 69       158         67         92         48       21          27

 70-74    681        273        409        182       80         101
 70       157         63         93         44       20          24
 71       147         59         88         40       18          22
 72       138         56         82         38       17          21
 73       123         49         74         32       13          18
 74       117         46         71         28       12          16

 75-79    499        184        315        118       52          66
 75       111         43         68         27       11          15
 76        98         37         60         25       11          14
 77        97         35         62         24       11          13
 78        96         34         62         22       10          12
 79        98         36         62         21       10          11

 80-84    302        103        199         65       29          36
 80        72         26         46         17        8           9
 81        67         23         44         14        6           8
 82        61         21         40         13        6           7
 83        51         17         34         11        5           6
 84        50         16         34         11        5           6

 85+      238         70        168         46       18          28

 0-14    8,663     4,385      4,277      2,719    1,385       1,334
 15-44  15,231     7,192      8,039      5,406    2,645       2,761
 45-64   4,835     2,154      2,681      1,698      794         903
 15+19  22,663    10,347     12,317      7,767    3,729       4,038
 45+     7,432     3,155      4,278      2,361    1,084       1,277
 65+     2,598     1,001      1,597        663      289         374
 75+     1,039       358        681        229       99         130

Appendix D

             1. UNWEIGHTED FREQUENCIES FOR NEWBORN INFANT DATA
                  (Defined as Column 84-85 Equal to 00 )

 RECODED DISCHARGE STATUS, COL 3
                                   CUMULATIVE    CUMULATIVE
  ITEM 1   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        27666       99.1        27666          99.1
     2           97        0.3        27763          99.5
     3          142        0.5        27905         100.0


 UNITS IN WHICH AGE IS GIVEN, COL 33
                                   CUMULATIVE    CUMULATIVE
   UNITS   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     3        27905      100.0        27905         100.0


   SEX,                            CUMULATIVE      CUMULATIVE
  ITEM 3   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        14486       51.9        14486          51.9
     2        13419       48.1        27905         100.0


 MARITAL STATUS, COL 36
                                   CUMULATIVE    CUMULATIVE
  ITEM 4   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     2        27905      100.0        27905         100.0

 DISCHARGE STATUS, COL 47
                                   CUMULATIVE    CUMULATIVE
  ITEM 7   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        26780       96.0        26780          96.0
     2            6        0.0        26786          96.0
     3          436        1.6        27222          97.6
     4           79        0.3        27301          97.8
     5          365        1.3        27666          99.1
     6           97        0.3        27763          99.5
     7          142        0.5        27905         100.0


 AGE RECODED INTO 4 GROUPS, COL 49
                                   CUMULATIVE    CUMULATIVE
  ITEM 8   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        27905      100.0        27905         100.0


 NUMBER OF DIAGNOSES, COL 50
                                   CUMULATIVE    CUMULATIVE
  ITEM 9   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        16048       57.5        16048          57.5
     2         6938       24.9        22986          82.4
     3         2536        9.1        25522          91.5
     4         1167        4.2        26689          95.6
     5          680        2.4        27369          98.1
     6          194        0.7        27563          98.8
     7          342        1.2        27905         100.0


 NUMBER OF PROCEDURES, COL 51
                                   CUMULATIVE    CUMULATIVE
  ITEM 10  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0        16487       59.1        16487          59.1
     1         9534       34.2        26021          93.2
     2          975        3.5        26996          96.7
     3          420        1.5        27416          98.2
     4          489        1.8        27905         100.0

 AGE RECODED INTO 10-YR GRPS, COL 84-85
                                   CUMULATIVE    CUMULATIVE
  ITEM 15  FREQUENCY    PERCENT    FREQUENCY       PERCENT


    00        27905      100.0        27905         100.0


   RACE,                           CUMULATIVE    CUMULATIVE
  ITEM 16  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        15013       53.8        15013          53.8
     2         3991       14.3        19004          68.1
     3          268        1.0        19272          69.1
     4         1110        4.0        20382          73.0
     5         1478        5.3        21860          78.3
     6         6045       21.7        27905         100.0


 MARITAL STATUS, RECODED, COL 87
                                   CUMULATIVE    CUMULATIVE
  ITEM 17  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     2        27905      100.0        27905         100.0


 LOS RECODED TO 5 CATEGORIES, COL 88
                                   CUMULATIVE    CUMULATIVE
  ITEM 18  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        26525       95.1        26525          95.1
     2          696        2.5        27221          97.5
     3          224        0.8        27445          98.4
     4          116        0.4        27561          98.8
     5          344        1.2        27905         100.0

  REGION,                          CUMULATIVE    CUMULATIVE
  ITEM 19  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1         5787       20.7         5787          20.7
     2         6435       23.1        12222          43.8
     3         9933       35.6        22155          79.4
     4         5750       20.6        27905         100.0


 BEDSIZE CATEGORY, COL 99
                                   CUMULATIVE    CUMULATIVE
  ITEM 20  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1         2499        9.0         2499           9.0
     2         5505       19.7         8004          28.7
     3         5826       20.9        13830          49.6
     4         9720       34.8        23550          84.4
     5         4355       15.6        27905         100.0


 HOSPITAL OWNERSHIP, COL 100
                                   CUMULATIVE    CUMULATIVE
  ITEM 21  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1         2646        9.5         2646           9.5
     2         3155       11.3        24750          88.7
     3        22104       79.2        27905         100.0


 PRINCIPAL EXP SOURCE OF PAYMENT, COL 131

                                   CUMULATIVE    CUMULATIVE
 ITEM 24.1 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0         1479        5.3         1479           5.3
     2          137        0.5         1616           5.8
     3         7456       26.7         9072          32.5
     4         3404       12.2        12476          44.7
     5          478        1.7        12954          46.4
     6         2992       10.7        15946          57.1
     7         9693       34.7        25639          91.9
     8         2238        8.0        27877          99.9
     9           28        0.1        27905         100.0

 EXP SOURCE OF PAYMENT, COL 132
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.2 FREQUENCY    PERCENT    FREQUENCY       PERCENT


  Frequency Missing = 27905


 SECONDARY EXP SOURCE OF PAYMENT, COL 133
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.3 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0          468       21.9          468          21.9
     3          135        6.3          603          28.2
     5          152        7.1          755          35.3
     6           65        3.0          820          38.3
     7          219       10.2         1039          48.6
     8         1038       48.5         2077          97.1
     9           62        2.9         2139         100.0
 Frequency Missing = 25766


 SECONDARY EXP SOURCE OF PAYMENT, COL 134
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.4 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     8            3      100.0            3         100.0
 Frequency Missing = 27902



              2. UNWEIGHTED FREQUENCIES FOR NON-NEWBORN DATA
                 (Defined as Column 84-85 Not Equal to 00)

 RECODED DISCHARGE STATUS, COL 3
                                   CUMULATIVE    CUMULATIVE
  ITEM 1   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1       237571       96.4       237571          96.4
     2         6988        2.8       244559          99.3
     3         1809        0.7       246368         100.0


 UNITS IN WHICH AGE IS GIVEN, COL 33
                                   CUMULATIVE    CUMULATIVE
   UNITS   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1       238260       96.7       238260          96.7
     2         5633        2.3       243893          99.0
     3         2475        1.0       246368         100.0


  SEX,                             CUMULATIVE    CUMULATIVE
  ITEM 3   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1       100203       40.7       100203          40.7
     2       146165       59.3       246368         100.0



 MARITAL STATUS, COL 36
                                   CUMULATIVE    CUMULATIVE
  ITEM 4   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        42649       17.3        42649          17.3
     2        40073       16.3        82722          33.6
     3        13181        5.4        95903          38.9
     4         4628        1.9       100531          40.8
     5          969        0.4       101500          41.2
     6        92803       37.7       194303          78.9
     7        52065       21.1       246368         100.0

 DISCHARGE STATUS, COL 47
                                   CUMULATIVE    CUMULATIVE
  ITEM 7   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1       205665       83.5       205665          83.5
     2         2159        0.9       207824          84.4
     3         6069        2.5       213893          86.8
     4        13106        5.3       226999          92.1
     5        10572        4.3       237571          96.4
     6         6988        2.8       244559          99.3
     7         1809        0.7       246368         100.0


 AGE RECODED INTO 4 GROUPS, COL 49
                                   CUMULATIVE    CUMULATIVE
  ITEM 8   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        25346       10.3        25346          10.3
     2        87478       35.5       112824          45.8
     3        49032       19.9       161856          65.7
     4        84512       34.3       246368         100.0


 NUMBER OF DIAGNOSES, COL 50
                                   CUMULATIVE    CUMULATIVE
  ITEM 9   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        41270       16.8        41270          16.8
     2        51961       21.1        93231          37.8
     3        39964       16.2       133195          54.1
     4        34925       14.2       168120          68.2
     5        34705       14.1       202825          82.3
     6        15686        6.4       218511          88.7
     7        27857       11.3       246368         100.0

 NUMBER OF PROCEDURES, COL 51
                                   CUMULATIVE    CUMULATIVE
  ITEM 10  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0        75227       30.5        75227          30.5
     1        67404       27.4       142631          57.9
     2        43816       17.8       186447          75.7
     3        32242       13.1       218689          88.8
     4        27679       11.2       246368         100.0


 AGE RECODED INTO 10-YR GRPS, COL 84-85
                                   CUMULATIVE    CUMULATIVE
  ITEM 15  FREQUENCY    PERCENT    FREQUENCY       PERCENT


    01         8108        3.3         8108           3.3
    02         8122        3.3        16230           6.6
    03         9116        3.7        25346          10.3
    04        24372        9.9        49718          20.2
    05        36639       14.9        86357          35.1
    06        26467       10.7       112824          45.8
    07        22979        9.3       135803          55.1
    08        26053       10.6       161856          65.7
    09        37977       15.4       199833          81.1
    10        46535       18.9       246368         100.0



  RACE,                            CUMULATIVE    CUMULATIVE
  ITEM 16  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1       141711       57.5       141711          57.5
     2        30023       12.2       171734          69.7
     3          951        0.4       172685          70.1
     4         4363        1.8       177048          71.9
     5         5849        2.4       182897          74.2
     6        63471       25.8       246368         100.0

 MARITAL STATUS, RECODED, COL 87
                                   CUMULATIVE    CUMULATIVE
  ITEM 17  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        43618       17.7        43618          17.7
     2        57882       23.5       101500          41.2
     3       144868       58.8       246368         100.0


 LOS RECODED TO 5 CATEGORIES, COL 88
                                   CUMULATIVE    CUMULATIVE
  ITEM 18  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1       187143       76.0       187143          76.0
     2        37697       15.3       224840          91.3
     3        11006        4.5       235846          95.7
     4         4673        1.9       240519          97.6
     5         5849        2.4       246368         100.0


  REGION,                          CUMULATIVE    CUMULATIVE
  ITEM 19  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        60771       24.7        60771          24.7
     2        63516       25.8       124287          50.4
     3        91501       37.1       215788          87.6
     4        30580       12.4       246368         100.0


 BEDSIZE CATEGORY, COL 99
                                   CUMULATIVE    CUMULATIVE
  ITEM 20  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        24217        9.8        24217           9.8
     2        49446       20.1        73663          29.9
     3        55950       22.7       129613          52.6
     4        83185       33.8       212798          86.4
     5        33570       13.6       246368         100.0

 HOSPITAL OWNERSHIP, COL 100
                                   CUMULATIVE    CUMULATIVE
  ITEM 21  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1        28233       11.5        28233          11.5
     2        23308        9.5       223060          90.5
     3       194827       79.1       246368         100.0


 PRINCIPAL EXP SOURCE OF PAYMENT, COL 131
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.1 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0         9216        3.7         9216           3.7
     1         3050        1.2        12266           5.0
     2        83137       33.7        95403          38.7
     3        34038       13.8       129441          52.5
     4        13499        5.5       142940          58.0
     5         3268        1.3       146208          59.3
     6        23578        9.6       169786          68.9
     7        60462       24.5       230248          93.5
     8        15266        6.2       245514          99.7
     9          854        0.3       246368         100.0


 EXP SOURCE OF PAYMENT, COL 132
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.2 FREQUENCY    PERCENT    FREQUENCY       PERCENT


 Frequency Missing = 246368

 SECONDARY EXP SOURCE OF PAYMENT, COL 133
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.3 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0         5070        9.9         5070           9.9
     2           41        0.1         5111          10.0
     3         7653       15.0        12764          25.0
     5          761        1.5        13525          26.5
     6         9455       18.5        22980          45.0
     7        19625       38.4        42605          83.5
     8         7853       15.4        50458          98.9
     9          585        1.1        51043         100.0
 Frequency Missing = 195325


 SECONDARY EXP SOURCE OF PAYMENT, COL 134
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.4 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0          307       33.6          307          33.6
     3          149       16.3          456          49.9
     5           15        1.6          471          51.5
     6           65        7.1          536          58.6
     7          215       23.5          751          82.2
     8          163       17.8          914         100.0
 Frequency Missing = 245454



             3.  WEIGHTED FREQUENCIES FOR NEWBORN INFANT DATA
                   (Defined as Column 84-85 Equal to 00)

 RECODED DISCHARGE STATUS, COL 3
                                   CUMULATIVE    CUMULATIVE
  ITEM 1   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      3645897       98.8      3645897          98.8
     2        11002        0.3      3656899          99.1
     3        31614        0.9      3688513         100.0


 UNITS IN WHICH AGE IS GIVEN, COL 33
                                   CUMULATIVE    CUMULATIVE
   UNITS   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     3      3688513      100.0      3688513         100.0


  SEX,                             CUMULATIVE    CUMULATIVE
  ITEM 3   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      1926108       52.2      1926108          52.2
     2      1762405       47.8      3688513         100.0


 MARITAL STATUS, COL 36
                                   CUMULATIVE    CUMULATIVE
  ITEM 4   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     2      3688513      100.0      3688513         100.0

 DISCHARGE STATUS, COL 47
                                   CUMULATIVE    CUMULATIVE
  ITEM 7   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      3536345       95.9      3536345          95.9
     2          727        0.0      3537072          95.9
     3        44805        1.2      3581877          97.1
     4         6926        0.2      3588803          97.3
     5        57094        1.5      3645897          98.8
     6        11002        0.3      3656899          99.1
     7        31614        0.9      3688513         100.0


 AGE RECODED INTO 4 GROUPS, COL 49
                                   CUMULATIVE    CUMULATIVE
  ITEM 8   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      3688513      100.0      3688513         100.0


 NUMBER OF DIAGNOSES, COL 50
                                   CUMULATIVE    CUMULATIVE
  ITEM 9   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      2178478       59.1      2178478          59.1
     2       893834       24.2      3072312          83.3
     3       318960        8.6      3391272          91.9
     4       153127        4.2      3544399          96.1
     5        71244        1.9      3615643          98.0
     6        24980        0.7      3640623          98.7
     7        47890        1.3      3688513         100.0


 NUMBER OF PROCEDURES, COL 51
                                   CUMULATIVE    CUMULATIVE
  ITEM 10  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0      2210830       59.9      2210830          59.9
     1      1255896       34.0      3466726          94.0
     2       113531        3.1      3580257          97.1
     3        47886        1.3      3628143          98.4
     4        60370        1.6      3688513         100.0

 AGE RECODED INTO 10-YR GRPS, COL 84-85
                                   CUMULATIVE    CUMULATIVE
  ITEM 15  FREQUENCY    PERCENT    FREQUENCY       PERCENT


    00      3688513      100.0      3688513         100.0


  RACE,                            CUMULATIVE    CUMULATIVE
  ITEM 16  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      2112192       57.3      2112192          57.3
     2       479529       13.0      2591721          70.3
     3        32168        0.9      2623889          71.1
     4       107598        2.9      2731487          74.1
     5       140717        3.8      2872204          77.9
     6       816309       22.1      3688513         100.0


 MARITAL STATUS, RECODED, COL 87
                                   CUMULATIVE    CUMULATIVE
  ITEM 17  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     2      3688513      100.0      3688513         100.0


 LOS RECODED TO 5 CATEGORIES, COL 88
                                   CUMULATIVE    CUMULATIVE
  ITEM 18  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      3528150       95.7      3528150          95.7
     2        81830        2.2      3609980          97.9
     3        29238        0.8      3639218          98.7
     4        13303        0.4      3652521          99.0
     5        35992        1.0      3688513         100.0

  REGION,                          CUMULATIVE    CUMULATIVE
  ITEM 19  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1       684583       18.6       684583          18.6
     2       806457       21.9      1491040          40.4
     3      1264024       34.3      2755064          74.7
     4       933449       25.3      3688513         100.0


 BEDSIZE CATEGORY, COL 99
                                   CUMULATIVE    CUMULATIVE
  ITEM 20  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1       535538       14.5       535538          14.5
     2       859207       23.3      1394745          37.8
     3       713188       19.3      2107933          57.1
     4      1094134       29.7      3202067          86.8
     5       486446       13.2      3688513         100.0


 HOSPITAL OWNERSHIP, COL 100
                                   CUMULATIVE    CUMULATIVE
  ITEM 21  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1       398368       10.8       398368          10.8
     2       538756       14.6      3149757          85.4
     3      2751389       74.6      3688513         100.0


 PRINCIPAL EXP SOURCE OF PAYMENT, COL 131

                                   CUMULATIVE    CUMULATIVE
 ITEM 24.1 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0       183551        5.0       183551           5.0
     2        19760        0.5       203311           5.5
     3      1009658       27.4      1212969          32.9
     4       404673       11.0      1617642          43.9
     5       105881        2.9      1723523          46.7
     6       363363        9.9      2086886          56.6
     7      1324135       35.9      3411021          92.5
     8       272754        7.4      3683775          99.9
     9         4738        0.1      3688513         100.0

 EXP SOURCE OF PAYMENT, COL 132
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.2 FREQUENCY    PERCENT    FREQUENCY       PERCENT


 Frequency Missing = 3688513


 SECONDARY EXP SOURCE OF PAYMENT, COL 133

                                   CUMULATIVE    CUMULATIVE
 ITEM 24.3 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0        36150       14.3        36150          14.3
     3        32528       12.9        68678          27.2
     5        39196       15.6       107874          42.8
     6        13324        5.3       121198          48.1
     7        23232        9.2       144430          57.3
     8       101075       40.1       245505          97.4
     9         6549        2.6       252054         100.0
 Frequency Missing = 3436459


 SECONDARY EXP SOURCE OF PAYMENT, COL 134
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.4 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     8          406      100.0          406         100.0
 Frequency Missing = 3688107
               4.  WEIGHTED FREQUENCIES FOR NON-NEWBORN DATA
                 (Defined as Column 84-85 Not Equal to 00)

 RECODED DISCHARGE STATUS, COL 3
                                   CUMULATIVE    CUMULATIVE
  ITEM 1   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1     29752975       96.1     29752975          96.1
     2       821297        2.7     30574272          98.8
     3       376640        1.2     30950912         100.0


 UNITS IN WHICH AGE IS GIVEN, COL 33
                                   CUMULATIVE    CUMULATIVE
   UNITS   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1     30128971       97.3     30128971          97.3
     2       573678        1.9     30702649          99.2
     3       248263        0.8     30950912         100.0


  SEX,                             CUMULATIVE    CUMULATIVE
  ITEM 3   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1     12406079       40.1     12406079          40.1
     2     18544833       59.9     30950912         100.0


 MARITAL STATUS, COL 36
                                   CUMULATIVE    CUMULATIVE
  ITEM 4   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      9194054       29.7      9194054          29.7
     2      6062361       19.6     15256415          49.3
     3      2760981        8.9     18017396          58.2
     4       996991        3.2     19014387          61.4
     5       195046        0.6     19209433          62.1
     6      7576666       24.5     26786099          86.5
     7      4164813       13.5     30950912         100.0

 DISCHARGE STATUS, COL 47
                                   CUMULATIVE    CUMULATIVE
  ITEM 7   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1     25687783       83.0     25687783          83.0
     2       252511        0.8     25940294          83.8
     3       915297        3.0     26855591          86.8
     4      1703984        5.5     28559575          92.3
     5      1193400        3.9     29752975          96.1
     6       821297        2.7     30574272          98.8
     7       376640        1.2     30950912         100.0


 AGE RECODED INTO 4 GROUPS, COL 49
                                   CUMULATIVE    CUMULATIVE
  ITEM 8   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      2531414        8.2      2531414           8.2
     2     11226701       36.3     13758115          44.5
     3      6328830       20.4     20086945          64.9
     4     10863967       35.1     30950912         100.0


 NUMBER OF DIAGNOSES, COL 50
                                   CUMULATIVE    CUMULATIVE
  ITEM 9   FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      4873799       15.7      4873799          15.7
     2      6562721       21.2     11436520          37.0
     3      5125483       16.6     16562003          53.5
     4      4214924       13.6     20776927          67.1
     5      3898130       12.6     24675057          79.7
     6      2072251        6.7     26747308          86.4
     7      4203604       13.6     30950912         100.0

 NUMBER OF PROCEDURES, COL 51
                                   CUMULATIVE    CUMULATIVE
  ITEM 10  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0     10524691       34.0     10524691          34.0
     1      8393887       27.1     18918578          61.1
     2      5168907       16.7     24087485          77.8
     3      3558119       11.5     27645604          89.3
     4      3305308       10.7     30950912         100.0


 AGE RECODED INTO 10-YR GRPS, COL 84-85
                                   CUMULATIVE    CUMULATIVE
  ITEM 15  FREQUENCY    PERCENT    FREQUENCY       PERCENT


    01       821941        2.7       821941           2.7
    02       805641        2.6      1627582           5.3
    03       903832        2.9      2531414           8.2
    04      3287467       10.6      5818881          18.8
    05      4614671       14.9     10433552          33.7
    06      3324563       10.7     13758115          44.5
    07      2907608        9.4     16665723          53.8
    08      3421222       11.1     20086945          64.9
    09      4883458       15.8     24970403          80.7
    10      5980509       19.3     30950912         100.0


  RACE,                            CUMULATIVE    CUMULATIVE
  ITEM 16  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1     20017886       64.7     20017886          64.7
     2      3692237       11.9     23710123          76.6
     3       138124        0.4     23848247          77.1
     4       446582        1.4     24294829          78.5
     5       542843        1.8     24837672          80.2
     6      6113240       19.8     30950912         100.0

 MARITAL STATUS, RECODED, COL 87
                                   CUMULATIVE    CUMULATIVE
  ITEM 17  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      9389100       30.3      9389100          30.3
     2      9820333       31.7     19209433          62.1
     3     11741479       37.9     30950912         100.0


 LOS RECODED TO 5 CATEGORIES, COL 88
                                   CUMULATIVE    CUMULATIVE
  ITEM 18  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1     23727687       76.7     23727687          76.7
     2      4648522       15.0     28376209          91.7
     3      1345478        4.3     29721687          96.0
     4       559337        1.8     30281024          97.8
     5       669888        2.2     30950912         100.0


 REGION,                           CUMULATIVE    CUMULATIVE
  ITEM 19  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      7140865       23.1      7140865          23.1
     2      7121396       23.0     14262261          46.1
     3     11255745       36.4     25518006          82.4
     4      5432906       17.6     30950912         100.0


 BEDSIZE CATEGORY, COL 99
                                   CUMULATIVE    CUMULATIVE
  ITEM 20  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1      5353341       17.3      5353341          17.3
     2      7750078       25.0     13103419          42.3
     3      6389707       20.6     19493126          63.0
     4      8041502       26.0     27534628          89.0
     5      3416284       11.0     30950912         100.0

 HOSPITAL OWNERSHIP, COL 100
                                   CUMULATIVE    CUMULATIVE
  ITEM 21  FREQUENCY    PERCENT    FREQUENCY       PERCENT


     1       3154143    10.2       3154143         10.2
     2       3758527    12.1       27192385        87.9
     3      24038242    77.7       30950912        100.0


 PRINCIPAL EXP SOURCE OF PAYMENT, COL 131
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.1 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0      1057494        3.4      1057494           3.4
     1       340840        1.1      1398334           4.5
     2     10849770       35.1     12248104          39.6
     3      4140351       13.4     16388455          52.9
     4      1842746        6.0     18231201          58.9
     5       535102        1.7     18766303          60.6
     6      2706935        8.7     21473238          69.4
     7      7507101       24.3     28980339          93.6
     8      1864893        6.0     30845232          99.7
     9       105680        0.3     30950912         100.0


 EXP SOURCE OF PAYMENT, COL 132
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.2 FREQUENCY    PERCENT    FREQUENCY       PERCENT


 Frequency Missing = 30950912

 SECONDARY EXP SOURCE OF PAYMENT, COL 133
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.3 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0       388094        5.5       388094           5.5
     2         6193        0.1       394287           5.5
     3      1272766       17.9      1667053          23.4
     5       215010        3.0      1882063          26.5
     6      1622516       22.8      3504579          49.3
     7      2797473       39.3      6302052          88.6
     8       754170       10.6      7056222          99.3
     9        53049        0.7      7109271         100.0
 Frequency Missing = 23841641


 SECONDARY EXP SOURCE OF PAYMENT, COL 134
                                   CUMULATIVE    CUMULATIVE
 ITEM 24.4 FREQUENCY    PERCENT    FREQUENCY       PERCENT


     0        15564       11.5        15564          11.5
     3        21581       15.9        37145          27.4
     5         3973        2.9        41118          30.4
     6        18229       13.5        59347          43.8
     7        48023       35.5       107370          79.3
     8        28016       20.7       135386         100.0
 Frequency Missing = 30815526




This page last reviewed: Thursday, January 28, 2016
This information is provided as technical reference material. Please contact us at cwus@cdc.gov to request a simple text version of this document.
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