WONDER Home FAQ Help Contact Us Search

Scientific Data Documentation

National Hospital Discharge Survey, 1995

DSN: CC36.NHDS95


Abstract

This material provides documentation for users of the 1995 NHDS Public Use 
Data Tape. The NHDS is conducted annually by the National Center for Health 
Statistics (NCHS) and is a principal source of information on inpatient 
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. 

Section III provides a detailed description of the
contents of each data record.  

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 frequencies for selected descriptive 
variables.     

I.  DESCRIPTION OF THE NATIONAL HOSPITAL DISCHARGE SURVEY

Introduction--This document and its appendices contain information collected 
by the 1995 National Hospital Discharge Survey.  This survey, conducted by the 
National Center for Health Statistics, annually collects medical and demographic 
information from a sample of discharge records selected from a national sample of 
nonFederal, short-stay hospitals.  The data serve as a basis for calculating 
statistics on inpatient hospital utilization.  For a description of the survey 
design and data collection procedures, see below.  For a more detailed description 
of the survey design, data collection procedures, and the estimation process, 
see Reference 1.  Publications based on the data for each survey year can be
obtained from the Government Printing Office.

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, in 1962 the NCHS began exploring possibilities for surveying morbidity in 
hospitals.  A national advisory group was established.  The NCHS conducted planning 
discussions with other officials 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 1963, 
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 1964 and 
confirmed the University of Pittsburgh's findings.

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

SURVEY METHODOLOGY

Source of the Data--The National Hospital Discharge Survey (NHDS) covers discharges
from noninstitutional hospitals, exclusive of Federal, military, and Veterans Administration
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 1995 the sample consisted of 525 hospitals.  Of the 525
hospitals, 17 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 508 inscope (eligible)
hospitals, 466 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 has been 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 actual 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 67 percent of the responding
hospitals.   The second was an automated method, used for approximately 33 percent of the
respondent hospitals, that involved the purchase of computerized data tapes from abstracting
service organizations, state data systems, or from the hospitals themselves.

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 1995, about 53 percent had the work performed 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 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 Modifica
tion, or ICD-9-CM (3).

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 first-listed code, with a code designating either normal or abnormal delivery in the
second-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.  
Figure 1.  Medical abstract for the 1995 National Hospital Discharge Survey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.

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.  The
addenda lists new codes, new fourth or fifth digits to existing codes, as well as other
modifications.  Changes go into effect October 1 of the calendar year.  A list of the changes
for 1986 through 1994 are listed in Appendix B.  All coding of the 1995 data is consistent
with the ICD-9-CM and the addendum effective October 1, 1994.  Information provided by
automated systems for the last three months of 1995 which was coded using the October
1995 addendum was converted back to the previous code assignment.  This was done in
order to prevent NHDS data users from mistaking partial year estimates for annual estimates. 

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
abstract services.

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, they are not official population estimates of the Bureau of
the Census.

Measurement Errors--As in any survey, results are subject to nonsampling or measurement
errors, which include errors due to hospital nonresponse, missing abstracts, information
incompletely or inaccurately recorded on abstract forms, and processing errors.  A very small
proportion, (less than one-half of one percent) of the discharge records failed to include the
sex, age, or date of birth of the patient. If the hospital record did not state either the age or
sex of patient, it was imputed by assigning an age or sex consistent with the age or sex of
other sampled patients with the same diagnostic code. In a very few cases (about a quarter
of a percent of the records), the age or sex was edited, because it was inconsistent with the
diagnosis.  Data on race was missing for 21.3 percent of the discharges, and no attempt was
made to impute for these missing values.

During 1995, 12.5 percent of the records lacked the day of admission or day of discharge,
but included a length of stay and a discharge month.  For these records, 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.  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 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 the estimate is obtained by dividing the
standard error by the estimate itself.  The resulting value is multiplied by 100, so the relative
standard error is expressed as a percent of the estimate.  Estimates of sampling variability
were calculated with SUDAAN 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, Barnwell, and
Bieler (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~*~~SQRT { a~+~b/X } 

with a and b provided in Table 1.

For example, in 1995 the estimated 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 328,000.  Using the applicable constants from Table 1 for estimates by sex produces:

          RSE (328,000) = 100 * SQRT {.001318 + (375.570/328,000)}

                     RSE(328,000)  =  4.96 %

The relative standard error for the estimate of interest is 4.96 percent.  From this the standard
error is obtained by multiplying the relative standard error by the estimate:

         SE(328,000)  =  328,000 * 4.96%  =  16,269     

The standard error can be employed to generate confidence intervals for statistical testing. 
In this example, the 95% confidence interval for the estimate of female inpatients with a
first-listed diagnosis of atherosclerotic heart disease is:

         (328,000 - 2*16,269)  <->   (328,000 + 2*16,269)

                    295,462   <->   360,538

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 *  SQRT {b * (1 - p)/(p * X)} 

where 100p 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 1995 the estimated number of discharges from short-stay hospitals which
were female was 18,525,000.  This is 60.3 percent of the estimated 30,722,000 discharges
for that year.  Using the applicable constants from Table 1 for estimates by sex produces:

RSE(.603) =  100 *  SQRT {375.570 * (1 - .603)/(.603 * 30,722,000)} 

                         RSE(.603)  =  0.2837%

The relative standard error for the estimate of interest is 0.2837 percent.  From this the
standard error is obtained by multiplying the relative standard error by the estimate:

                 SE(.603)  =  .603 * 0.2837%  =  .0017.        

The standard error can be employed to generate confidence intervals for statistical testing. 
In this example, the 95% confidence interval for the estimate of the percentage of female
inpatients is:

               (.603 - 2 *.0017)   <->   (.603 + 2 *.0017)

                          .5996   <->   .6064

or, equivalently,       59.96%    <->   60.64%

Table 1.  Parameter values for relative standard errors for National Hospital Discharge
Survey aggregate statistics by statistic type:  United States, 1995

Parameter Estimates for Number of First-Listed Diagnoses -- 1995 NHDS

Parameter Estimates for Number of First-Listed Diagnoses -- 1995 NHDS
	a	b
TOTAL	0.001470	383.006
MALE	0.001760	337.999
FEMALE	0.001318	375.570
UNDER 15 YEARS	0.017012	204.502
15-44 YEARS	0.001562	344.452
45-64 YEARS	0.001346	346.329
65 YEARS & OVER	0.001742	362.499
NORTHEAST REGION	0.005335	242.463
MIDWEST REGION	0.007528	206.001
SOUTH REGION	0.005192	391.875
WEST REGION	0.004464	356.516
WORKER'S COMPENSATION	0.005369	261.892
MEDICARE	0.002025	361.087
MEDICAID	0.004874	272.861
OTHER GOVT PAYMENTS	0.016884	306.984
PRIVATE INSURANCE	0.001855	359.874
SELF PAY	0.004979	288.710
NO CHARGE/OTHER PYMTS	0.027670	213.612
PAYMENT NOT STATED	0.032245	638.678
WHITE RACE	0.003175	393.713
BLACK RACE	0.007613	223.320
ALL OTHER RACES	0.022422	174.594
RACE NOT STATED	0.019735	254.547
Parameter Estimates for Number of All-Listed Diagnoses -- 1995 NHDS
	a	b
TOTAL	0.001830	416.120
MALE	0.002143	394.996
FEMALE	0.001880	352.920
UNDER 15 YEARS	0.013717	274.540
15-44 YEARS	0.002528	330.180
45-64 YEARS	0.001584	370.660
65 YEARS & OVER	0.001988	404.887
NORTHEAST REGION	0.005105	255.647
MIDWEST REGION	0.007693	192.250
SOUTH REGION	0.006951	428.100
WEST REGION	0.005627	384.339
WORKER'S COMPENSATION	0.008805	269.628
MEDICARE	0.002326	410.834
MEDICAID	0.006336	252.916
OTHER GOVT PAYMENTS	0.015701	388.033
PRIVATE INSURANCE	0.002363	331.826
SELF PAY	0.005933	328.823
NO CHARGE/OTHER PYMTS	0.029890	222.305
PAYMENT NOT STATED	0.042549	384.083
WHITE RACE	0.003802	420.239
BLACK RACE	0.008472	221.903
ALL OTHER RACES	0.025330	160.003
RACE NOT STATED	0.020261	265.211
Parameter Estimates for Number of Days of Care -- 1995 NHDS
	a	b
TOTAL	0.004678	810.910
MALE	0.003051	1216.430
FEMALE	0.005842	741.020
UNDER 15 YEARS	0.019964	576.270
15-44 YEARS	0.003015	1185.440
45-64 YEARS	0.002950	1225.550
65 YEARS & OVER	0.002789	1852.770
NORTHEAST REGION	0.009606	529.150
MIDWEST REGION	0.009445	652.660
SOUTH REGION	0.005597	1333.620
WEST REGION	0.008591	1042.910
WORKER'S COMPENSATION	0.010907	723.980
MEDICARE	0.002981	1998.120
MEDICAID	0.007343	1117.820
OTHER GOVT PAYMENTS	0.024521	1257.190
PRIVATE INSURANCE	0.003235	1072.380
SELF PAY	0.011089	1241.880
NO CHARGE/OTHER PYMTS	0.044565	532.200
PAYMENT NOT STATED	0.045044	1859.050
WHITE RACE	0.004956	841.730
BLACK RACE	0.011020	862.19
ALL OTHER RACES	0.030357	755.670
RACE NOT STATED	0.037472	1006.290
Parameter Estimates for Number of All-Listed Procedures -- 1995 NHDS
	a	b
TOTAL	0.002292	338.540
MALE	0.002633	350.456
FEMALE	0.002195	342.400
UNDER 15 YEARS	0.020369	261.921
15-44 YEARS	0.003580	355.115
45-64 YEARS	0.002882	319.558
65 YEARS & OVER	0.002971	315.118
NORTHEAST REGION	0.006875	262.270
MIDWEST REGION	0.009340	178.460
SOUTH REGION	0.004027	330.110
WEST REGION	0.007656	381.790
WORKER'S COMPENSATION	0.014989	151.134
MEDICARE	0.003266	318.767
MEDICAID	0.006438	241.779
OTHER GOVT PAYMENTS	0.021322	256.159
PRIVATE INSURANCE	0.002758	339.577
SELF PAY	0.009506	240.855
NO CHARGE/OTHER PYMTS	0.035172	220.024
PAYMENT NOT STATED	0.039598	233.786
WHITE RACE	0.004330	356.546
BLACK RACE	0.008749	232.021
ALL OTHER RACES	0.022639	194.201
RACE NOT STATED	0.020182	264.704

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
possible.

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.

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
adjustment, the weights of the discharges in 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 1995
NHDS, 90 percent of the 466 responding hospitals provided data for all twelve months,
and 96 percent provided at least 9 months of data. 

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 21-25. 
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 days of care (tape location 13-16) and these products are summed. 
Average length of stay data can be obtained by dividing the days of care by the number of
discharges as calculated above.

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

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. 1000, Series 2-No. 39.  Public Health Service.  Washington.  U.S. 
   Government Printing Office, Sept. 1970.

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) 80-1260.  Public Health 
   Service.  Washington.  U.S. Government Printing Office, Sept. 1980.

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, Babubhai.V., Beth G. Barnwell, and Gayle S. Bieler.  SUDAAN User's Manual:
   Software for Analysis of Correlated Data, Release 6.40.   Research Triangle 
   Institute:  Research Triangle Park, N.C. 1995.

II.  TECHNICAL DESCRIPTION OF TAPE

Data Set Name-------------------------------------------BG00.NHDS95.PU
Number of REELS or CARTRIDGES----------------------------------------1
Number of Recording Tracks, REEL-------------------------------------9
Number of Recording Tracks, CARTRIDGE-------------------------------18
Density for REEL (bpi)-------------------------------------------6,250
Density for CARTRIDGE (bpi)-------------------------------------38,000
Language--------------------------------------------------------EBCDIC
Parity-------------------------------------------------------------Odd
Record Length-------------------------------------------------------81
Block Size------------------------------------------------------16,200
Number of Records----------------------------------------------262,809       

III.  RECORD FORMAT: Location and Coding of Data Elements

     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.

 Item       Tape        Number of
Number     Location     Positions   Item Description and Codes

  1            1-2           2         Survey Year: 95

  2             3            1         Newborn Status:  1 = Newborn
                                                        2 = Not Newborn

  3             4            1         Units for Age:   1 = Years
                                                        2 = Months
                                                        3 = Days

  4            5-6           2         Age in years, months, or days: 
                                              If Units = Years:   0-99*
                                              If Units = Months:  01-11
                                              If Units = Days:    00-31

  5             7            1         Sex:  1 = Male
                                             2 = Female

  6             8            1         Race: 1 = White  
                                             2 = Black
                                             3 = American Indian/Eskimo
                                             4 = Asian/Pacific Islander
                                             5 = Other
                                             9 = Not Stated

  7             9            1         Marital Status:  1 = Married
                                                        2 = Single
                                                        3 = Widowed
                                                        4 = Divorced
                                                        5 = Separated
                                                        6 = Unknown
                                                        9 = Not Stated

  8           10-11           2      Month of Admission:  
                                          01-12:  January to December

  
----------------------------------------------------------------------
* Ages 100 and over were recoded to 99.

 Item        Tape       Number of
Number     Location     Positions    Item Description and Codes

   9            12          1          Discharge Status:
                                                1 = Routine/Discharged Home
                                                2 = Left Against Medical Advice
                                                3 = Discharged/Transferred to 
                                                     Short-Term Facility 
                                                4 = Discharged/Transferred to
                                                      Long-Term Care Institution
                                                5 = Alive, Disposition Not Stated
                                                6 = Dead
                                                9 = Not Stated or Not Reported  

  10          13-16        4          Days of Care:
                                           Use to calculate number of days of care;
                                           Values of zero generated by the computer
                                           from admission and discharge dates were
                                           changed to one.  (Discharges for which
                                           dates of admission and discharge are the
                                           same are identified in Item Number 11.)

  11             17          1          Length of Stay Flag:  
                                             0 = Less than 1 day
                                             1 = 1 day or more

  12             18          1          Geographic Region:  1 = Northeast
                                                            2 = Midwest
                                                            3 = South
                                                            4 = West

  13             19          1           Number of Beds, Recode: 1 = 6-99
                                                                 2 = 100-199
                                                                 3 = 200-299
                                                                 4 = 300-499
                                                                 5 = 500 and over

  14             20          1           Hospital Ownership:  1 = Proprietary
                                                              2 = Government
                                                              3 = Nonprofit, including Church
 

 Item        Tape      Number of
Number     Location    Positions    Item Description and Codes

  15         21-25         5         Analysis Weight:  Use to obtain weighted estimates

  16           26          1         Principal Expected Source of Payment:
                                               0 = No Charge                            
                                               1 = Workmen's Compensation
                                               2 = Medicare
                                               3 = Medicaid
                                               4 = Other Govt Payments, incl. Title V
                                               5 = Blue Cross
                                               6 = Other Private/Commercial Insurance
                                               7 = Self-Pay
                                               8 = Other
                                               9 = Not Stated 

  17           27           1         Secondary Expected Source of Payment:
                                               Same coding as item 16

  18         28-32          5        Diagnosis Code #1 *
  19         33-37          5        Diagnosis Code #2 *
  20         38-42          5        Diagnosis Code #3 *
  21         43-47          5        Diagnosis Code #4 *
  22         48-52          5        Diagnosis Code #5 *
  23         53-57          5        Diagnosis Code #6 *
  24         58-62          5        Diagnosis Code #7 *

  25         63-66          4        Procedure Code #1 *
  26         67-70          4        Procedure Code #2 *
  27         71-74          4        Procedure Code #3 *
  28         75-78          4        Procedure Code #4 *

  29         79-81          3        DRG, Grouper Version 12.0

-------------------------------------------------------------------------------
* Codes are in compliance with the International Classification of Diseases, 
  9th Revision, Clinical Modification, (ICD-9-CM).  For diagnosis codes, 
  there is an implied decimal between positions 3 and 4.  For E-codes, the 
  implied decimal is between the 4th and 5th position.  For inapplicable 4th 
  or 5th digits, a dash is inserted.  For procedure codes, there is an implied 
  decimal between positions 2 and 3.  For inapplicable 3rd or 4th digits, a 
  dash is inserted.
--------------------------------------------------------------------------------

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

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 and 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 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 is computed by
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 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 procedures

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 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 

The International Classification of Diseases, 9th Revision, Clinical Modification, which
has been used for coding NHDS data since 1979, undergoes 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 1995. 

As described earlier in this document, the 1995 NHDS involved two data collection modes: 
manual and abstract service.  All data collected manually were coded using the third edition of the
ICD-9-CM, which includes the addenda for 1986 through 1994.  Data collected via abstract
service were coded using two different ICD-9-CM revisions.  For the first 9 months of 1995, the
ICD-9-CM including the addendum of October 1, 1986-94 was used; for the last 3 months the
October 1995 addendum was used.  Therefore, data provided by automated systems for the last
three months of 1995 was converted back to the code assignment under the October 1994
addendum.  This was done in order to prevent NHDS data users from mistaking partial year
estimates for annual estimates.    

In order to assist users in data retrieval, a conversion table is  provided that shows the date
of introduction of each new code 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
Current code(s) assignment	Effective October 1	Previous code(s) assignment
008.00-008.09	1992	008.0
008.43-008.47	1992	008.49
008.61-008.69	1992	008.6
041.00-041.09	1992	041.0
041.10-041.19	1992	041.1
041.81-041.89	1992	041.8
042	1994	042.0-042.2,042.9,043.0-043.3,
		043.9,044.0,044.9
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
070.22	1994	070.20
070.23	1994	070.21
070.30-070.31	1991	070.3
070.32	1994	070.30
070.33	1994	070.31
070.41-070.49	1991	070.4
070.44	1994	070.41
070.51-070.59	1991	070.5
070.54	1994	070.51
077.98-077.99	1993	077.9
078.10-078.11,078.19	1993	078.1
078.88	1993	078.89
079.4	1993	079.8
079.50-079.53,079.59	1993	079.8
079.88-079.89	1993	079.8
079.98-079.99	1993	079.9
088.81,088.89	1989	088.8
088.82	1993	088.89
099.40-099.49	1992	099.4
099.50-099.59	1992	078.89
112.84-112.85	1992	112.89
114.4-114.5	1993	114.3
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
250.02	1993	250.90
250.03	1993	250.91
250.12	1993	250.10
250.13	1993	250.11
250.22	1993	250.20
250.23	1993	250.21
250.32	1993	250.30
250.33	1993	250.31
250.42	1993	250.40
250.43	1993	250.41
250.52	1993	250.50
250.53	1993	250.51
250.62	1993	250.60
250.63	1993	250.61
250.72	1993	250.70
250.73	1993	250.71
250.82	1993	250.80
250.83	1993	250.81
250.92	1993	250.90
250.93	1993	250.91
283.10-283.11,283.19	1993	283.1
305.1	1994	305.10,305.11,305.12,
		305.13 (delete code)
320.81-320.89	1992	320.8
312.81-312.82,381.89	1994	312.8
333.92-333.93	1994	333.99
337.20-337.22,337.29	1993	337.5
342.00-342.02	1994	342.0
342.10-342.12	1994	342.1
342.80-342.82	1994	342.9
342.90-342.92	1994	342.9
344.00-344.04,344.09	1994	344.0
344.30-344.32	1994	344.3
344.40-344.42	1994	344.4
344.81-344.89	1993	344.8
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
346.00-346.01	1992	346.0
346.10-346.11	1992	346.1
346.20-346.21	1992	346.2
346.80-346.81	1992	346.8
346.90-346.91	1992	346.9
355.71	1993	354.4
355.79	1993	355.7
371.82	1992	371.89
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
414.00-414.01	1994	414.0
414.02-414.03	1994	996.03
429.71	1989	410.0-410.9
429.79	1989	410.0-410.9
433.00-433.01	1993	433.0
433.10-433.11	1993	433.1
433.20-433.21	1993	433.2
433.30-433.31	1993	433.3
433.80-433.81	1993	433.8
433.90-433.91	1993	433.9
434.00-434.01	1993	434.0
434.10-434.11	1993	434.1
434.90-434.91	1993	434.9
437.7	1992	780.9
440.20-440.22	1992	440.2
440.23	1993	440.20 & 707.1 or 707.8 or 707.9
440.24	1993	440.20 & 785.4
440.29	1993	440.20
440.30-440.32	1994	996.1
441.00-441.03	1994	441.0
441.6	1993	441.1 & 441.3
441.7	1993	441.2 & 441.4
446.20-446.21,446.29	1990	446.2
451.82-451.84	1993	451.89
482.30-482.39	1992	482.3
482.81-482.89	1992	482.8
483.0	1992	483
483.8	1992	483
491.20-491.21	1991	491.2
493.20	1989	493.90
493.21	1989	493.91
512.1	1994	997.3
518.81	1987	799.1
518.82-518.89	1987	518.8
524.00-524.09	1992	524.0
524.10-524.19	1992	524.1
524.60-524.69	1991	524.6
524.70-524.79	1992	524.8
530.10-530.11, 530.19	1993	530.1
530.81	1993	530.1
530.82-530.84, 530.89	1993	530.8
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
536.3	1994	536.8
537.82	1990	537.89
537.83	1991	537.82
556.0-556.6	1994	556
556.8-556.9	1994	556
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
593.70-593.73	1994	593.7
596.51-596.53	1992	596.5
596.54	1992	344.61
596.55-596.59	1992	596.5
599.81-599.89	1992	599.8
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
654.90-654.94	1990	654.2,654.9
657.0	1991	657
659.60,659.61,659.63	1992	659.80,659.81,659.83
665.10,665.11	1992	665.10,665.11,665.12,665.14
Note: The title for the subcategory, 665.1 has been changed,
making the fifth-digit subclassification, 665.12 and 665.14 invalid.
670.0	1991	670
672.0	1991	672
677	1994	* No previous code assignments.
692.72-692.74	1992	692.79
692.82-692.83	1992	692.89
702.0-702.8	1991	702
702.11,702.19	1994	702.1
704.02	1993	704.09
709.00-709.01,709.09	1994	709.0
710.5	1992	288.3,729.1
733.10-733.16, 733.19	1993	733.1
738.10-738.19	1992	738.1
747.60-747.64, 747.69	1993	747.6
747.82	1993	747.89
753.10-753.17,753.19	1990	753.1
759.81-759.89	1989	759.8
759.83	1994	759.89
760.75	1991	760.79
760.76	1994	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
780.01-780.09	1992	780.0
780.03	1993	780.01
780.57	1992	780.51,780.53
781.8	1994	781.9
787.01-787.03	1994	787.0
788.20-788.21, 788.29	1993	788.2
788.30-788.39	1992	788.3
788.40-788.43	1993	788.4
788.61-788.62, 788.69	1993	788.6
789.00-789.07, 789.09	1994	789.0
789.30-789.37, 789.39	1994	789.3
789.40-789.47, 789.49	1994	789.4
789.60-789.67, 789.69	1994	789.6
790.91	1993	790.9
790.92	1993	286.9
790.93, 790.99	1993	790.9
795.71	1994	795.8 (delete code)
795.79	1994	795.7
795.8	1986	795.7
864.05	1992	864.09
864.15	1992	864.19
909.5	1994	909.9
925.1-925.2	1993	925
995.60-995.69	1993	995.0
996.04	1994	996.09
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
998.81-998.82, 998.89	1994	998.8
V03.81-V03.82, V03.89	1994	V03.8
V05.3-V05.4	1993	V05.8
V06.5-V06.6	1994	V06.8
V07.31,V07.39	1994	V07.3
V07.4	1992	V07.8
V08	1994	044.9, 795.8 (delete code)
V09.0-V09.91	1993	* No previous code assignments
V12.00-V12.03, V12.09	1994	V12.0
V12.70-V12.72, V12.79	1994	V12.7
V13.00-V13.01, V13.09	1994	V13.0
V15.82	1994	305.13 (delete code)
V25.43	1992	V25.49
V25.5	1992	V25.8
V29.0-V29.8	1992	V71.8
V29.9	1992	V71.9
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
V43.60-V43.66, V43.69	1994	V43.6
V45.00	1994	V45.89
V45.01	1994	V45.0
V45.02, V45.09	1994	V45.89
V45.51	1994	V45.5
V45.52, V45.59	1994	V45.89
V45.82	1994	V45.89
V49.60-V49.67	1994	V49.5
V49.70-V49.77	1994	V49.5
V50.41-V50.42, V50.49	1994	V50.8
V53.31	1994	V53.3
V53.32, V53.39	1994	V53.9
V57.21-V57.22	1994	V57.2
V58.41, V58.49	1994	V58.4
V58.81, V58.89	1994	V58.8
V65.40-V65.45, V65.49	1994	V65.4
V69.0-V69.3	1994	* No previous code assignments.
V69.8-V69.9	1994	* No previous code assignments.
V72.81-V72.85	1993	V72.8
V73.88-V73.89	1993	V73.8
V73.98-V73.99	1993	V73.9
E869.4	1994	E869.8

 

PROCEDURE CODES
Current code(s) assignment	Effective October 1	Previous code(s) assignment
02.96	1992	89.19
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
34.05	1994	34.99
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 (Before October 1986 contents of current code 36.05 would have been assigned to 36.0), 36.02
36.09	1986	36.0
36.09	1991	36.00 (Code Deleted)
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
37.80-37.87	1992	89.49 (Code deleted, this procedure is included in the code for pacemaker insertion/replacement)
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 only)	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
41.04	1994	99.79
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 (Hartmann Resection Added)	1988	48.66 (Code Deleted)
45.95	1987	45.93
46.13	1992	46.12 (Code Deleted)
46.32	1989	46.39
46.85	1989	46.99
49.31	1989	49.3
49.39	1989	49.3
51.10	1989	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
54.25	1993	54.98
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
66.01	1992	66.0
66.02	1992	66.73
68.15	1987	68.14
68.16	1987	68.13
68.9	1992	68.4
74.3	1992	69.11 (Code Deleted)
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 2/	1987	78.40
78.91 2/	1987	78.41
78.92 2/	1987	78.42
78.93 2/	1987	78.43
78.94 2/	1987	78.44
78.95 2/	1987	78.45
78.96 2/	1987	78.46
78.97 2/	1987	78.47
78.98 2/	1987	78.48
78.99 2/	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
81.97	1992	81.59
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
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
99.28	1994	99.25
99.71-99.79 3/	1988	99.07
99.85	1987	93.35
99.86	1987	93.39
99.88	1988	99.83

1/ Before October 1986 contents of current code 36.05 would havebeen 
   assigned to 36.0.
2/ 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.
3/ 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 1, 1995

        [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	261,407	127,134	134,273
Northeast	51,395	24,751	26,644
Midwest	61,698	30,003	31,695
South	91,143	44,018	47,125
West	57,170	28,361	28,809
White	217,041	106,062	110,979
Black	32,883	15,513	17,370
All other	11,483	5,559	5,924
Under 15 years	57,726	29,554	28,172
Under 1 year	3,848	1,970	1,878
1-4 years	15,743	8,055	7,688
5-14 years	38,134	19,529	18,606
Northeast	10,646	5,452	5,193
Midwest	13,491	6,910	6,581
South	20,027	10,243	9,784
West	13,562	6,948	6,614
White	45,728	23,463	22,264
Black	9,002	4,565	4,437
All other	2,996	1,526	1,470
15-44 years	117,976	58,700	59,276
15-24 years	35,431	17,909	17,522
25-34 years	40,349	19,972	20,377
35-44 years	42,195	20,819	21,377
Northeast	22,896	11,354	11,542
Midwest	27,770	13,835	13,935
South	40,999	20,177	20,823
West	26,311	13,335	12,976
White	96,442	48,412	48,030
Black	15,803	7,506	8,297
All other	5,731	2,782	2,949
45-64 years	52,173	25,192	26,981
45-54 years	31,043	15,149	15,894
55-64 years	21,130	10,043	11,087
Northeast	10,561	5,045	5,516
Midwest	12,344	5,985	6,359
South	18,434	8,837	9,597
West	10,834	5,325	5,509
White	44,817	21,874	22,943
Black	5,358	2,388	2,971
All other	1,998	930	1,068
65 years & over	33,532	13,689	19,844
65-74 years	18,759	8,342	10,417
75-84 years	11,145	4,330	6,815
85 years and over	3,628	1,017	2,611
Northeast	7,293	2,900	4,393
Midwest	8,094	3,273	4,821
South	11,683	4,762	6,921
West	6,462	2,753	3,709
White	30,055	12,313	17,742
Black	2,719	1,055	1,665
All other	758	321	437

*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 1995 rates using the civilian resident
population.

Civilian Population of the United States, July 1, 1995.  Estimates by Age, 
Sex, and Region.  Data are consistent with the estimates announced in Census 
Advisory CB94-43.  Methodology is described in Current Population Report 
Series P25-1106.  Release date 3/15/94

_____________________________________________________________________________

           United States           Northeast                Midwest            South               West
Age    Total   Male  Female  Total  Male   Female  Total  Male Female  Total Male  Female Total  Male   Female
_________________________________________________________________________________________________
                                Civilian Population in Thousands

ALL	261,407	127,134	134,273	51,395	24,751	26,644	61,698	30,003	31,695	91,143	44,018	47,125	57,170	28,361	28,809
0-4	19,591	10,025	9,566	3,617	1,852	1,765	4,393	2,248	2,145	6,782	3,469	3,314	4,799	2,456	2,342
5-9	19,220	9,843	9,377	3,613	1,853	1,760	4,498	2,305	2,193	6,631	3,390	3,240	4,479	2,295	2,184
10-14	18,915	9,685	9,229	3,416	1,747	1,668	4,601	2,358	2,243	6,614	3,384	3,230	4,285	2,197	2,088
15-19	17,974	9,189	8,785	3,229	1,645	1,583	4,417	2,257	2,160	6,383	3,248	3,134	3,945	2,038	1,908
20-24	17,458	8,720	8,738	3,259	1,627	1,632	4,146	2,070	2,076	6,244	3,066	3,178	3,809	1,957	1,851
25-29	18,721	9,282	9,439	3,733	1,849	1,884	4,267	2,110	2,157	6,457	3,156	3,301	4,264	2,167	2,097
30-34	21,629	10,690	10,938	4,317	2,131	2,186	4,960	2,452	2,508	7,445	3,637	3,808	4,906	2,470	2,436
35-39	22,064	10,906	11,158	4,392	2,167	2,225	5,208	2,588	2,621	7,548	3,685	3,863	4,915	2,466	2,449
40-44	20,132	9,913	10,219	3,967	1,934	2,032	4,771	2,358	2,413	6,922	3,384	3,538	4,472	2,237	2,236
45-49	17,419	8,532	8,887	3,492	1,688	1,804	4,081	2,002	2,079	6,068	2,961	3,108	3,778	1,882	1,896
50-54	13,624	6,617	7,008	2,766	1,328	1,439	3,201	1,557	1,644	4,801	2,318	2,484	2,855	1,414	1,441
55-59	11,084	5,316	5,767	2,239	1,065	1,174	2,655	1,279	1,376	3,949	1,877	2,072	2,241	1,096	1,145
60-64	10,046	4,727	5,320	2,064	965	1,099	2,407	1,147	1,260	3,616	1,681	1,934	1,960	933	1,027
65-69	9,928	4,506	5,422	2,125	951	1,173	2,343	1,072	1,271	3,533	1,594	1,939	1,928	889	1,039
70-74	8,831	3,836	4,995	1,905	811	1,094	2,075	902	1,172	3,109	1,343	1,766	1,742	780	962
75-79	6,681	2,720	3,961	1,466	577	888	1,625	651	974	2,302	937	1,365	1,289	555	734
80-84	4,464	1,609	2,854	984	344	640	1,108	392	716	1,530	548	982	842	326	516
85+	3,628	1,017	2,611	813	217	597	944	256	688	1,209	341	869	662	204	458
0-14	57,726	29,554	28,172	10,646	5,452	5,193	13,491	6,910	6,581	20,027	10,243	9,784	13,562	6,948	6,614
15-44	117,976	58,700	59,276	22,896	11,354	11,542	27,770	13,835	13,935	40,999	20,177	20,823	26,311	13,335	12,976
45-64	52,173	25,192	26,981	10,561	5,045	5,516	12,344	5,985	6,359	18,434	8,837	9,597	10,834	5,325	5,509
15+	203,681	97,581	106,101	40,750	19,299	21,450	48,207	23,093	25,114	71,117	33,776	37,341	43,608	21,413	22,195
45+	85,705	38,881	46,825	17,853	7,945	9,908	20,437	9,258	11,179	30,118	13,599	16,518	17,297	8,078	9,219
65+	33,532	13,689	19,844	7,293	2,900	4,393	8,094	3,273	4,821	11,683	4,762	6,921	6,462	2,753	3,709
75+	14,773	5,347	9,427	3,263	1,138	2,125	3,676	1,299	2,378	5,041	1,825	3,216	2,792	1,084	1,708

Civilian Population of the United States, July 1, 1995. Estimates by Age, Sex, 
and Race (Consistent with the 1990 Census, as enumerated.)
__________________________________________________________________________

                          All races                                White                            Black                               Other races
Age     Total      Male   Female    Total Male Female    Total     Male    Female Total       Male        Female

                                                                 Civilian population in thousands

All	261,407	127,134	134,273	217,041	106,062	110,979	32,883	15,513	17,370	11,483	5,559	5,924
0-4	19,591	10,025	9,566	15,451	7,924	7,527	3,100	1,570	1,530	1,040	531	509
0	3,848	1,970	1,878	3,015	1,547	1,467	621	314	307	212	108	104
1	3,840	1,964	1,876	3,028	1,552	1,475	608	307	301	205	105	100
2	3,882	1,990	1,892	3,067	1,575	1,492	611	311	300	204	104	100
3	3,965	2,026	1,939	3,137	1,606	1,531	619	313	305	209	107	103
4	4,056	2,075	1,981	3,205	1,643	1,562	642	325	317	209	107	103
5-9	19,220	9,843	9,377	15,237	7,818	7,418	3,025	1,535	1,491	958	490	468
5	4,039	2,069	1,970	3,198	1,642	1,557	641	325	316	201	103	98
6	3,888	1,991	1,897	3,071	1,575	1,496	625	318	307	192	98	94
7	3,810	1,949	1,861	3,016	1,547	1,470	602	304	298	191	98	93
8	3,616	1,851	1,765	2,876	1,475	1,401	561	285	276	180	92	88
9	3,867	1,983	1,883	3,075	1,580	1,495	597	303	293	195	99	95
10-14	18,915	9,685	9,229	15,040	7,721	7,319	2,877	1,460	1,417	998	505	493
10	3,869	1,985	1,884	3,084	1,586	1,499	588	299	289	197	100	97
11	3,705	1,897	1,808	2,952	1,516	1,436	559	283	276	194	98	95
12	3,778	1,932	1,846	2,998	1,537	1,460	576	292	284	204	103	102
13	3,811	1,949	1,863	3,030	1,553	1,477	580	294	286	202	102	100
14	3,751	1,922	1,829	2,976	1,529	1,447	574	292	283	201	102	99
15-19	17,974	9,189	8,785	14,290	7,328	6,962	2,806	1,418	1,387	878	443	435
15	3,790	1,944	1,846	2,994	1,540	1,454	602	306	296	194	98	96
16	3,627	1,866	1,761	2,877	1,483	1,393	570	291	279	180	91	89
17	3,596	1,852	1,744	2,864	1,479	1,385	556	284	273	176	89	86
18	3,482	1,775	1,708	2,779	1,421	1,358	544	273	271	160	80	79
19	3,479	1,753	1,726	2,777	1,405	1,372	533	264	269	168	84	85
20-24	17,458	8,720	8,738	13,982	7,027	6,955	2,562	1,239	1,322	914	453	461
20	3,477	1,746	1,731	2,786	1,406	1,381	523	257	265	168	83	84
21	3,327	1,666	1,661	2,652	1,334	1,318	501	245	256	174	87	88
22	3,314	1,654	1,660	2,645	1,330	1,316	491	237	254	178	88	90
23	3,493	1,742	1,752	2,797	1,404	1,392	509	244	265	187	93	95
24	3,846	1,911	1,935	3,101	1,553	1,548	538	256	282	207	103	105
25-29	18,721	9,282	9,439	15,186	7,603	7,583	2,536	1,193	1,343	999	486	513
25	3,810	1,894	1,916	3,090	1,549	1,541	514	243	270	207	102	104
26	3,689	1,828	1,861	3,002	1,501	1,501	487	230	257	200	97	103
27	3,663	1,818	1,846	2,967	1,488	1,479	498	234	264	198	96	102
28	3,543	1,752	1,791	2,889	1,443	1,445	472	221	251	182	87	95
29	4,015	1,991	2,025	3,238	1,622	1,616	565	265	299	213	104	109
30-34	21,629	10,690	10,938	17,803	8,898	8,905	2,776	1,285	1,491	1,050	508	542
30	4,161	2,056	2,105	3,397	1,697	1,700	556	258	298	207	100	107
31	4,220	2,085	2,136	3,464	1,730	1,734	547	254	293	210	101	109
32	4,310	2,130	2,181	3,547	1,771	1,776	549	254	295	214	104	110
33	4,380	2,159	2,221	3,628	1,809	1,819	550	253	297	202	97	105
34	4,557	2,261	2,296	3,766	1,890	1,876	574	265	308	217	105	112
35-39	22,064	10,906	11,158	18,319	9,156	9,163	2,749	1,275	1,474	996	476	520
35	4,551	2,255	2,296	3,764	1,885	1,879	576	268	308	211	102	110
36	4,391	2,167	2,224	3,650	1,823	1,828	544	251	294	197	94	103
37	4,451	2,198	2,253	3,699	1,847	1,852	552	255	296	200	96	104
38	4,185	2,064	2,121	3,490	1,740	1,750	513	237	275	182	87	96
39	4,485	2,222	2,263	3,716	1,861	1,855	564	263	301	205	97	108
40-44	20,132	9,913	10,219	16,863	8,400	8,462	2,375	1,096	1,279	894	417	478
40	4,318	2,133	2,186	3,595	1,796	1,799	528	245	284	195	92	103
41	4,110	2,021	2,090	3,440	1,711	1,729	486	224	262	184	86	98
42	3,987	1,961	2,026	3,351	1,666	1,684	459	211	248	178	83	95
43	3,870	1,897	1,973	3,246	1,611	1,635	449	206	244	175	80	94
44	3,846	1,902	1,944	3,231	1,616	1,615	452	210	242	163	76	87
45-49	17,419	8,532	8,887	14,833	7,347	7,486	1,852	844	1,008	734	342	393
45	3,732	1,836	1,896	3,137	1,562	1,575	432	199	233	163	75	88
46	3,550	1,739	1,811	3,012	1,493	1,519	387	176	211	151	70	82
47	3,580	1,749	1,830	3,039	1,502	1,536	387	175	211	154	72	83
48	3,653	1,787	1,866	3,187	1,575	1,612	334	151	183	132	61	70
49	2,904	1,421	1,484	2,458	1,215	1,243	312	142	170	134	64	70
50-54	13,624	6,617	7,008	11,720	5,750	5,971	1,381	619	761	523	248	276
50	2,888	1,407	1,481	2,465	1,214	1,251	302	136	166	121	57	64
51	2,781	1,352	1,429	2,393	1,175	1,218	280	126	154	108	51	57
52	2,913	1,417	1,496	2,536	1,245	1,291	274	123	151	103	48	54
53	2,567	1,243	1,324	2,205	1,079	1,126	267	119	148	95	45	50
54	2,476	1,197	1,278	2,121	1,037	1,084	258	115	143	97	46	51
55-59	11,084	5,316	5,767	9,540	4,625	4,915	1,138	500	638	406	192	214
55	2,312	1,113	1,199	1,967	956	1,011	254	114	141	91	43	48
56	2,315	1,112	1,203	1,996	970	1,026	236	103	134	83	40	43
57	2,291	1,099	1,192	1,969	954	1,015	239	105	133	83	39	44
58	2,029	970	1,058	1,763	852	911	195	85	110	71	33	38
59	2,137	1,023	1,115	1,845	893	952	214	94	120	78	37	42
60-64	10,046	4,727	5,320	8,723	4,152	4,571	988	425	563	334	149	185
60	2,111	997	1,114	1,832	875	958	206	89	118	72	33	39
61	1,934	918	1,016	1,678	806	873	189	82	107	67	30	37
62	1,939	912	1,027	1,672	796	876	199	86	113	68	30	38
63	1,968	926	1,042	1,717	818	899	188	81	108	62	27	35
64	2,095	975	1,120	1,823	858	965	205	88	117	66	29	37
65-69	9,928	4,506	5,422	8,726	3,993	4,733	920	393	527	282	119	162
65	2,067	959	1,108	1,799	844	954	205	87	118	63	27	36
66	2,010	923	1,087	1,761	814	947	192	84	107	58	24	33
67	2,041	930	1,110	1,796	827	968	189	80	109	56	23	32
68	1,913	856	1,056	1,691	762	929	169	72	97	52	22	30
69	1,897	837	1,060	1,679	745	934	165	70	96	52	22	30
70-74	8,831	3,836	4,995	7,918	3,462	4,456	697	280	416	216	94	122
70	1,884	829	1,055	1,677	743	934	157	64	93	49	21	28
71	1,822	797	1,025	1,634	720	914	143	57	86	45	20	25
72	1,762	769	993	1,578	693	885	138	56	82	46	20	26
73	1,712	736	976	1,543	667	875	130	52	78	39	17	22
74	1,652	705	947	1,487	638	848	129	51	78	37	16	21
75-79	6,681	2,720	3,961	6,039	2,470	3,569	510	194	316	132	56	77
75	1,512	635	877	1,358	573	785	122	49	73	32	14	19
76	1,405	583	821	1,272	530	741	105	42	63	28	11	16
77	1,312	532	780	1,189	485	704	97	37	61	25	11	15
78	1,264	504	760	1,146	460	686	94	34	60	24	10	14
79	1,189	466	723	1,074	422	652	91	34	58	23	10	13
80-84	4,464	1,609	2,854	4,069	1,469	2,600	318	107	211	76	33	44
80	1,076	409	668	981	374	607	76	26	50	19	8	11
81	976	361	616	890	330	560	70	24	46	16	7	9
82	895	321	574	815	293	522	65	22	43	15	6	9
83	801	280	521	734	256	478	54	18	35	13	6	8
84	715	239	476	649	216	433	54	17	37	12	5	7
85+	3,628	1,017	2,611	3,303	919	2,385	274	79	195	51	19	32
0-14	57,726	29,554	28,172	45,728	23,463	22,264	9,002	4,565	4,437	2,996	1,526	1,470
15-44	117,976	58,700	59,276	96,442	48,412	48,030	15,803	7,506	8,297	5,731	2,782	2,949
45-64	52,173	25,192	26,981	44,817	21,874	22,943	5,358	2,388	2,971	1,998	930	1,068
15+	203,681	97,581	106,101	171,314	82,599	88,715	23,881	10,949	12,932	8,487	4,033	4,454
45+	85,705	38,881	46,825	74,872	34,187	40,685	8,078	3,443	4,635	2,756	1,251	1,504
65+	33,532	13,689	19,844	30,055	12,313	17,742	2,719	1,055	1,665	758	321	437
75+	14,773	5,347	9,427	13,411	4,858	8,553	1,102	381	721	260	107	152

APPENDIX D

BASIC DATA FOR NEWBORN INFANTS, Non-Medical Variables
	UNWEIGHTED N	WEIGHTED ESTIMATE
SURVEY YEAR
95	29,134	3,630,558
UNITS FOR AGE
1 = years	0	0
2 = months	0	0
3 = days	29,134	3,630,558
AGE
Under 15	29,134	3,630,558
15-44	0	0
45-64	0	0
65 and Up	0	0
SEX
1 = Male	14,945	1,872,083
2 = Female	14,189	1,758,475
RACE
1 = White	15,682	2,066,766
2 = Black	4,081	462,114
3 = AmInd/Eskimo	138	15,531
4 = Asian/PacIsland	900	114,603
5 = Other	1,411	104,815
9 = Race Not Stated	6,922	866,729
MARITAL STATUS
1 = Married	0	0
2 = Single	29,134	3,630,558
3 = Widowed	0	0
4 = Divorced	0	0
5 = Separated	0	0
6 = Unknown	0	0
9 = Not Stated	0	0
DISCHARGE STATUS
1 = Routine/Home	27,718	3,450,749
2 = Left Ag Medical Advice	10	2,628
3 = Short Term Facility	309	39,160
4 = Long Term Care	20	3,885
5 = Alive, Not Stated	748	75,461
6 = Dead	134	13,375
9 = Status Not Stated	195	45,300
LENGTH OF STAY FLAG
0 = Less than 1 day	732	87,268
1 = 1 day or more	28,402	3,543,290
	UNWEIGHTED N	WEIGHTED ESTIMATE
REGION
1 = NorthEast	5,966	699,331
2 = MidWest	8,214	785,845
3 = South	8,816	1,321,036
4 = West	6,138	824,346
BEDSIZE GROUP
1 = 6-99	3,709	590,830
2 = 100-199	5,545	819,231
3 = 200-299	5,887	666,236
4 = 300-499	9,852	1,066,708
5 = 500 and Up	4,141	487,553
HOSPITAL OWNERSHIP GROUP
1 = Proprietary	1,581	367,628
2 = Government	2,663	451,140
3 = Nonprofit	24,890	2,811,790
EXPECTED SOURCE OF PAYMENT, PRINCIPAL
0 = No Charge	130	17,575
1 = Workers Comp	0	0
2 = Medicare	65	11,161
3 = Medicaid	8,706	1,111,193
4 = Other Govt Pymt	509	83,063
5 = Blue Cross	2,590	319,775
6 = Other Priv/Comm	12,849	1,556,370
7 = Self-Pay	1,817	243,392
8 = Other	2,023	177,490
9 = Pymt Not Stated	445	110,539
ADMISSION MONTH
01 = January	2,384	302,410
02 = February	2,283	291,560
03 = March	2,528	308,055
04 = April	2,415	291,404
05 = May	2,631	326,547
06 = June	2,576	317,385
07 = July	2,540	317,426
08 = August	2,609	314,860
09 = September	2,515	314,693
10 = October	2,305	300,309
11 = November	2,072	257,284
12 = December	2,276	288,625
BASIC DATA FOR NON-NEWBORNS, Non-Medical Variables
	UNWEIGHTED N	WEIGHTED ESTIMATE
SURVEY YEAR
95	233,678	30,722,351
UNITS FOR AGE
1 = years	225,770	29,932,342
2 = months	5,507	547,679
3 = days	2,401	242,330
AGE
Under 15	24,058	2,405,422
15-44	81,165	10,593,181
45-64	45,975	6,167,656
65 and Up	82,480	11,556,092
SEX
1 = Male	93,566	12,197,504
2 = Female	140,112	18,524,847
RACE
1 = White	138,189	19,950,723
2 = Black	33,066	3,887,498
3 = AmInd/Eskimo	799	106,612
4 = Asian/PacIsland	3,866	485,662
5 = Other	8,771	505,345
9 = Race Not Stated	48,987	5,786,511
MARITAL STATUS
1 = Married	39,989	9,518,998
2 = Single	39,104	6,469,430
3 = Widowed	12,624	3,109,178
4 = Divorced	4,707	1,159,454
5 = Separated	985	189,839
6 = Unknown	23,154	2,358,780
9 = Not Stated	113,115	7,916,672
DISCHARGE STATUS
1 = Routine/Home	188,476	24,631,436
2 = Left Ag Medical Advice	2,233	272,755
3 = Short Term Facility	6,824	1,123,540
4 = Long Term Care	16,095	2,218,478
5 = Alive, Not Stated	11,756	1,246,924
6 = Dead	6,421	806,971
9 = Status Not Stated	1,873	422,247
LENGTH OF STAY FLAG
0 = Less than 1 day	5,801	1,000,419
1 = 1 day or more	227,877	29,721,932
	UNWEIGHTED N	WEIGHTED ESTIMATE
REGION
1 = NorthEast	58,860	7,051,480
2 = MidWest	67,913	6,994,250
3 = South	73,824	11,373,398
4 = West	33,081	5,303,223
BEDSIZE GROUPING
1 = 6-99	28,235	6,220,329
2 = 100-199	43,340	7,229,037
3 = 200-299	49,459	5,794,252
4 = 300-499	81,352	8,030,262
5 = 500 and Up	31,292	3,448,471
HOSPITAL OWNERSHIP GROUP
1 = Proprietary	16,952	3,273,795
2 = Government	23,078	3,944,689
3 = Nonprofit	193,648	23,503,867
EXPECTED SOURCE OF PAYMENT, PRINCIPAL
0 = No Charge	818	108,023
1 = Workers Comp	1,913	233,701
2 = Medicare	82,681	11,606,616
3 = Medicaid	35,892	4,515,355
4 = Other Govt Pymt	3,309	534,814
5 = Blue Cross	17,091	2,140,320
6 = Other Priv/Comm	66,485	8,218,327
7 = Self-Pay	11,832	1,560,144
8 = Other	10,600	1,105,988
9 = Pymt Not Stated	3,057	699,063
ADMISSION MONTH
01 = January	21,251	2,784,479
02 = February	19,507	2,555,116
03 = March	21,450	2,817,980
04 = April	19,492	2,542,520
05 = May	20,616	2,674,741
06 = June	19,527	2,545,283
07 = July	19,409	2,550,184
08 = August	19,681	2,560,903
09 = September	18,516	2,402,520
10 = October	18,360	2,490,490
11 = November	17,660	2,384,749
12 = December	18,209	2,413,386
FIRST-LISTED DIAGNOSES FOR NEWBORN INFANTS, by ICD9-CM Chapter
	UNWEIGHTED N	WEIGHTED ESTIMATE
VCODES	29,122	3,630,146
CHAPTER 1	0	0
CHAPTER 2	0	0
CHAPTER 3	0	0
CHAPTER 4	0	0
CHAPTER 5	-	-
CHAPTER 6	0	0
CHAPTER 7	0	0
CHAPTER 8	0	0
CHAPTER 9	0	0
CHAPTER 10	0	0
CHAPTER 11	0	0
CHAPTER 12	0	0
CHAPTER 13	0	0
CHAPTER 14	-	-
CHAPTER 15	-	-
CHAPTER 16	0	0
CHAPTER 17	0	0
FIRST-LISTED DIAGNOSES FOR NON-NEWBORNS, by ICD9-CM Chapter
	UNWEIGHTED N	WEIGHTED ESTIMATE
VCODES	34,928	4,182,676
CHAPTER 1	7,278	884,623
CHAPTER 2	13,682	1,802,286
CHAPTER 3	9,528	1,278,420
CHAPTER 4	2,876	338,968
CHAPTER 5	15,357	2,008,508
CHAPTER 6	4,404	560,500
CHAPTER 7	43,074	5,830,490
CHAPTER 8	24,755	3,328,909
CHAPTER 9	21,640	3,030,509
CHAPTER 10	12,527	1,768,410
CHAPTER 11	4,366	542,075
CHAPTER 12	3,601	481,562
CHAPTER 13	10,815	1,479,216
CHAPTER 14	1,941	159,434
CHAPTER 15	1,439	141,918
CHAPTER 16	1,973	312,498
CHAPTER 17	19,494	2,591,349
WEIGHTED FREQUENCIES - ALL-LISTED DIAGNOSES, by ICD9-CM Chapter
	NEWBORN INFANTS	NON-NEWBORNS
ALL	6,838,162	121,167,653
ECODES	20,398	2,912,978
VCODES	4,212,301	7,912,680
CHAPTER 1	30,059	3,472,655
CHAPTER 2	14,493	4,356,040
CHAPTER 3	19,645	11,960,017
CHAPTER 4	8,554	3,873,813
CHAPTER 5	1,590	7,278,786
CHAPTER 6	15,149	3,391,254
CHAPTER 7	24,290	25,389,890
CHAPTER 8	14,758	9,337,869
CHAPTER 9	24,673	8,228,037
CHAPTER 10	32,564	6,714,514
CHAPTER 11	0	7,857,920
CHAPTER 12	22,456	1,502,750
CHAPTER 13	11,816	4,374,212
CHAPTER 14	235,658	577,324
CHAPTER 15	2,091,179	389,183
CHAPTER 16	49,985	5,672,500
CHAPTER 17	8,594	5,965,231
WEIGHTED FREQUENCIES - ALL-LISTED PROCEDURES, by ICD9-CM Chapter
	NEWBORN INFANTS	NON-NEWBORNS
ALL	2,365,553	39,807,237
CHAPTER 1	60,750	953,860
CHAPTER 2	0	84,781
CHAPTER 3	422	269,060
CHAPTER 4	1,007	68,058
CHAPTER 5	2,872	352,652
CHAPTER 6	12,836	1,041,151
CHAPTER 7	93,062	4,839,533
CHAPTER 8	645	362,545
CHAPTER 9	8,953	5,074,438
CHAPTER 10	4,599	1,101,877
CHAPTER 11	1,202,414	351,243
CHAPTER 12	0	2,092,846
CHAPTER 13	0	6,365,411
CHAPTER 14	1,237	3,076,911
CHAPTER 15	7,263	1,341,751
CHAPTER 16	969,493	12,431,120

---