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Scientific Data Documentation
National Hospital Discharge Survey, 1993
DSN: CC36.NHDS93
1993 NATIONAL HOSPITAL DISCHARGE SURVEY (NHDS)
PUBLIC USE DATA TAPE DOCUMENTATION
Abstract
This material provides documentation for users of the 1993 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 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 frequencies for selected descriptive variables.
I. DESCRIPTION OF THE NATIONAL HOSPITAL DISCHARGE SURVEY
Introduction--This document and its appendices contain information
collected by the 1993 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 1993 the sample consisted of 528 hospitals.  Of the 528
hospitals, 15 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 513 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 68 percent of the responding hospitals.  The
second was an automated method, used for approximately 32 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
1993, about 55 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 Modification, or ICD-9-CM (3).  All of the diagnostic and
procedure codes in the ICD-9-CM are utilized.  Figure 1. Medical abstract 
for the 1993 National Hospital Discharge Survey
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.  
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 in October of the calendar
year.  A list of the changes for 1986 through 1992 are listed in
Appendix B.  All coding of the 1993 data is consistent with the
ICD-9-CM and the addendum effective October, 1992.  Information
provided by automated systems for the last three months of 1993
which was coded using the October 1993 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. 
Less than one-half of one percent of the discharge records failed
to include the sex of patient.  Age or date of birth was available
for all discharges.  If the hospital record does not state either
the age or sex of patient, it is imputed by assigning 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 19.2 percent of the
discharges, and no attempt was made to impute for these missing
values.
During 1993, 9.7 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 is assigned to the record
and the admission date is computed based on the given length of
stay.  For records with a length of stay 30 days or less, a
discharge day of the 30th of the month is assigned and the
admission date is 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 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 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:
          with a and b provided in Table 1.
For example, in 1993 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 170,000. 
Using the applicable constants from Table 1 for estimates by sex
produces:
          RSE(170,000) = 7.42%
The relative standard error for the estimate of interest is 7.42  
percent.  From this the standard error is obtained by multiplying
the relative standard error by the estimate:
          SE(170,000) =  170,000 * 7.42% = 12,614      
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:
          (170,000 - 2*12,614) <-> (170,000 + 2*12,614)
                      144,772  <->  195,228
 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:
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 1993 the estimated number of discharges from short-stay 
hospitals which were female was 18,563,000.  This is  60.22
percent of the estimated 30,825,000 discharges for that year. 
Using the applicable constants from Table 1 for estimates by sex
produces:
         RSE(.6022) = 0.299%
The relative standard error for the estimate of interest is 0.299 
percent.  From this the standard error is obtained by multiplying
the relative standard error by the estimate:
          SE(.6022) = .6022 * 0.299% = 0.0018.        
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:
        (.6022 - 2*0.0018) <-> (.6022 + 2*0.0018)
                   .5986   <->  .6058
or, equivalently,   59.9%  <->   60.6%
Table 1.  Parameter values for relative standard errors for
National Hospital Discharge Survey aggregate statistics by
statistic type:  United States, 1993
Parameter Estimates for Number of Discharges or First-Listed Diagnoses 
                               Constant a          Constant b
 TOTAL                          0.001294            1082.615
 MALE                           0.004253            332.843
 FEMALE                         0.003040            417.946
 UNDER 15 YEARS                 0.065517            110.056
 15-44 YEARS                    0.006183            245.201
 45-64 YEARS                    0.008257            182.876
 65 YEARS & OVER                0.004099            314.867
 NORTHEAST REGION               0.002821            307.085
 MIDWEST REGION                 0.006861            660.696
 SOUTH REGION                   0.002894            543.012
 WEST REGION                   -0.001931            1689.447
 WHITE RACE                     0.00281             935.083
 BLACK RACE                     0.005994            284.162
 ALL OTHER RACES                0.029679            335.994
 RACE NOT STATED                0.010664            1087.208
 WORKER'S COMPENSATION          0.037393            343.704
 MEDICARE                       0.003932            324.078
 MEDICAID                       0.002945            867.318
 PAYMENT NOT STATED             0.039491            444.527
 OTHER GOVT PAYMENTS            0.019248            1283.325
 PRIVATE INSURANCE              0.001539            2261.692
 SELF PAY                       0.002776            819.599
 NO CHARGE /OTHER PYMTS         0.027821            867.385
-------------------------------------------------------------------------                    
 Parameter Estimates for Number of Days of Care 
                               Constant a          Constant b
                    
 TOTAL                          0.001763            1846.934
     
 MALE                           0.008520            1037.674
 FEMALE                         0.007496            2795.394
                    
 UNDER 15 YEARS                 0.041306            176.591
 15-44 YEARS                    0.016973            509.236
 45-64 YEARS                    0.018500            192.754
 65 YEARS & OVER                0.010031            1567.29
                    
 NORTHEAST REGION               0.005151            1562.49
 MIDWEST REGION                 0.026122            569.283
 SOUTH REGION                   0.004855            1462.136
 WEST REGION                    0.033626            2889.826
                    
 WHITE RACE                     0.003462            1590.81
 BLACK RACE                     0.010738            661.233
 ALL OTHER RACES                0.072745            348.509
 RACE NOT STATED                0.019045            1490.095
                    
 WORKER'S COMPENSATION          0.020033            3795.978
 MEDICARE                       0.004928            1799.284
 MEDICAID                       0.002729            8939.791
 PAYMENT NOT STATED             0.043269            1827.646
 OTHER GOVT PAYMENTS            0.019862            11495.000
 PRIVATE INSURANCE              0.001260            16794.000
 SELF PAY                       0.028309            5931.526
 NO CHARGE/OTHER                0.025579            9983.000
 ----------------------------------------------------------------- 
                   
 Parameter Estimates for Number of All-Listed Diagnoses                     
                    
                               Constant a          Constant b  
                    
 TOTAL                          0.001672            1076.014
                    
 MALE                           0.003198            317.725
 FEMALE                         0.002188            607.621
                    
 UNDER 15 YEARS                 0.051527            125.423
 15-44 YEARS                    0.004292            297.759
 45-64 YEARS                    0.008804            180.459
 65 YEARS & OVER                0.002356            12.911
                    
 NORTHEAST REGION               0.003894            249.488
 MIDWEST REGION                 0.007894            497.590
 SOUTH REGION                   0.003721            723.299
 WEST REGION                    0.000805            2474.137
                    
 WHITE RACE                     0.002746            780.935
 BLACK RACE                     0.006094            278.663
 ALL OTHER RACES                0.035098            290.449
 RACE NOT STATED                0.012956            1424.873
                    
 WORKER'S COMPENSATION          0.021676            1309.058
 MEDICARE                       0.011341            1334.180
 MEDICAID                       0.001667            5902.552
 PAYMENT NOT STATED             0.041143            994.562
 OTHER GOVT PAYMENTS            0.039953            7613.656
 PRIVATE INSURANCE              0.002516            20291.000
 SELF PAY                       0.002736            3514.979
 NO CHARGE/OTHER                0.031288            1565.705
 --------------------------------------------------------------------                   
 Parameter Estimates for Number of Procedures           
                    
                               Constant a       Constant b
                    
 TOTAL                          0.001781            463.926
                    
 MALE                           0.006808            273.720
 FEMALE                         0.003862            636.779
                    
 UNDER 15 YEARS                 0.037698            110.109
 15-44 YEARS                    0.008629            304.399
 45-64 YEARS                    0.005092            127.555
 65 YEARS & OVER                0.001763            551.656
                    
 NORTHEAST REGION               0.005613            321.543
 MIDWEST REGION                 0.008477            212.188
 SOUTH REGION                   0.003733            418.823
 WEST REGION                    0.008575            1057.077
                    
 WHITE RACE                     0.003694            440.649
 BLACK RACE                     0.007315            265.143
 ALL OTHER RACES                0.036061            198.400
 RACE NOT STATED                0.011670            1190.802
                    
 WORKER'S COMPENSATION          0.013748            2049.131
 MEDICARE                       0.008558            338.428
 MEDICAID                       0.004417            1627.049
 PAYMENT NOT STATED             0.054885            59.909
 OTHER GOVT PAYMENTS            0.024174            877.284
 PRIVATE INSURANCE              0.002351            5232.749
 SELF PAY                       0.007905            1760.988
 NO CHARGE/OTHER                0.050258            1342.692
 --------------------------------------------------------------------
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
1993 NHDS, 82.6 percent of the 466 responding hospitals provided
data for all twelve months, and 91.8 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 descriptive 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, B.V. 1981.  SESUDAAN:  Standard Errors Program for Computing
  of Standardized Rates from Sample Survey Data.  Research Triangle
  Institute. Research Triangle Park, N.C.
II.  TECHNICAL DESCRIPTION OF TAPE
Data Set Name------------------------NHDS.YR1993
Number of Reels--------------------------------1
Number of Recording Tracks---------------------9
Density (bpi)-------------------------------6250
Language----------------------------------EBCDIC
Parity---------------------------------------Odd
Record Length--------------------------------205  
Block Size---------------------------------20500
Number of Records------------------------235,411

III. 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.
 Item    Tape    Number of
 Number  Location Positions   Item Description and Codes
  1       1-2       2         Survey Year: 93
  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.
   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,
                                                       incl. Church
  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 10.0
---------------------------------------------------------------------------
* 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 4 and 5.  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 
Although the International Classification of Diseases, 9th
Revision, Clinical Modification has been used for coding NHDS data
since 1979, the classification 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 1993. 
As described earlier, the 1993 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 1992.  Data collected via
abstract service were coded using two different ICD-9-CM revisions. 
For the first 9 months of 1993, the ICD-9-CM including the addendum
of October 1, 1986-92 was used; for the last 3 months the October
1993 addendum was used.  Therefore, data provided by automated
systems for the last three months of 1993 was converted back to the
code assignment under the October 1992 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 for each new code, its date of introduction 
and the previously assigned code eguivalent, which had been used 
for reporting the selected diagnosis or procedure prior to issuance
of the new code.
DIAGNOSIS CODES
Current Code(s)              Effective                   Previous Code(s)
Assignment                    October 1                     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
042.0-042.9                     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
099.40-099.49                   1992                            099.4
099.50-099.59                   1992                           *078.89
112.84-112.85                   1992                           *112.89
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
Current Code(s)               Effective                Previous Code(s)
Assignment                    October 1                      Assignment
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
Current Code(s)               Effective                 Previous Code(s)
 Assignment                   October 1                       Assignment
237.70-237.72                   1990                            237.7
320.81-320.89                   1992                            320.8
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
*346.00-346.02                  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
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
Current Code(s)                Effective                  Previous Code(s)
Assignment                     October 1                       Assignment
411.81                          1989                                410.9
411.89                          1989                                411.8
429.71                          1989                          410.0-410.9
429.79                          1989                          410.0-410.9
437.7                           1992                               780.9
440.20-440.22                   1992                               440.2
446.20-446.21,446.29            1990                               446.2
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
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
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
Current Code(s)                Effective                  Previous Code(s)
Assignment                     October 1                       Assignment
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
*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
654.90-651.94                   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        651.10,651.11,651.12,651.14
                                 
Note: The title for the subcategory, 665.1 has been changed, making the
fifth-digit subclassicifications, 665.12 and 665.14 invalid.
670.0                           1991                              670
672.0                           1991                              672
692.72-692.74                   1992                             *692.79
692.82-692.83                   1992                             *692.89
702.0-702.8                     1991                              702
710.5                           1992                       * 288.3,729.1
Current Code(s)                Effective               Previous Code(s)
Assignment                     October 1                    Assignment
738.10-738.19                   1992                             738.1
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
780.01-780.09                   1992                              780.0
780.57                          1992                    * 780.51,780.53
788.30-788.39                   1992                              788.3
795.8                           1986                              795.7
864.05                          1992                             864.09
864.15                          1992                             864.19
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
V07.4                           1992                               V07.8
V25.43                          1992                             *V25.49
V25.5                           1992                               V25.8
*V29.0-V29.8                    1992                               V71.8
*V29.9                          1992                              *V71.9
Current Code(s)                Effective               Previous Code(s)
Assignment                     October 1                    Assignment
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
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
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
*Before October 1986 contents of current code 36.05 would have
 been assigned to 36.0.
Current Code(s)                Effective                Previous Code(s)
Assignment                     October 1                     Assignment
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 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
Current Code(s)                Effective                Previous Code(s)
Assignment                     October 1                     Assignment
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 (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,or51.82 
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
Current Code(s)                Effective            Previous Code(s)
Assignment                     October 1                 Assignment
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
Current Code(s)                Effective            Previous Code(s)
Assignment                     October 1                 Assignment
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               8 1 . 5 1 ,
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
*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.
Current Code(s)                Effective                Previous Code(s)
Assignment                     October 1                     Assignment
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                                      199193.92 (Code Deleted)
96.71                                      199193.92 (Code Deleted)
96.72                                      199193.92 (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 1, 1993
            [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            256,436          124,592       131,843
   Northeast         51,271          24,669         26,602
   Midwest           60,959          29,613         31,347
   South             88,648          42,768         45,881
   West	             55,557          27,543         28,014
   White            213,621         104,252        109,369
   Black             31,888          15,022         16,866
   All other         10,927           5,318          5,609
Under 15 years       56,753          29,053         27,700
   Under 1 year       3,920           2,003          1,917
   1-4 years         15,785           8,075          7,709
   5-14 years        37,048          18,975         18,073
   Northeast         10,470           5,362          5,108
   Midwest           13,514           6,921          6,592
   South             19,554          10,000          9,554
   West	             13,216           6,770          6,445
   White             45,115          23,149         21,966
   Black              8,815           4,467          4,349
   All other          2,823           1,438          1,385
15-44 years         117,341          58,342         58,999
		      
   15-24 years       35,456          17,901         17,555
   25-34 years       41,342          20,460         20,882
   35-44 years       40,543          19,981         20,562
   Northeast         23,208          11,501         11,707
   Midwest           27,603          13,741         13,863
   South             40,443          19,884         20,559
   West	             26,087          13,216         12,870
   White             96,310          48,301         48,008
   Black             15,445           7,313          8,132
   All other          5,586           2,727          2,859
45-64 years          49,550          23,904         25,646
   45-54 years        28,628         13,976         14,652
   55-64 years        20,922          9,928         10,994
   Northeast          10,393          4,962          5,432
   Midwest            11,782          5,709          6,073
   South              17,292          8,283          9,009
   West	              10,082          4,950          5,132
   White              42,750         20,833         21,917
   Black               4,988          2,224          2,764
   All other           1,812            847            965
65 years & over	      32,791          13,293         19,498
   65-74 years        18,652           8,236         10,417
   75-84 years        10,769           4,112          6,657
   85 years and over   3,369             946          2,424
   Northeast           7,199           2,844          4,354
   Midwest             8,060           3,241          4,819
   South              11,360           4,601          6,758
   West                6,173           2,606          3,566
   White              29,447          11,969          17,477
   Black               2,639           1,018           1,621
   All other             705             306             400
*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 1993 rates using the civilian resident
population.
Civilian Population of the United States, July 1, 1993.  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           
 ---------------------------------------------------------------------------------------
 Age   Total     Male    Female     Total    Male    Female    Total    Male    Female   
 ---------------------------------------------------------------------------------------
All   256,436  124,592  131,843    51,271   24,669   26,602   60,959   29,613   31,347   
0-14   56,753   29,053   27,700    10,470   10,000    9,554   13,216    6,770    6,445   
 0-4   19,705   10,078    9,627     3,699    1,893    1,806    4,485    2,294    2,191   
 5-9   18,519    9,483    9,036     3,439    1,764    1,676    4,446    2,278    2,168   
10-14  18,529    9,492    9,037     3,332    1,705    1,626    4,583    2,350    2,233   
15-44  117,341   58,342  58,999    23,208   11,501   11,707   27,603   13,741   13,863   
15-19   17,172    8,776   8,396     3,169    1,615    1,554    4,219    2,156    2,063   
20-24   18,284    9,125   9,159     3,606    1,798    1,808    4,365    2,177    2,188   
25-29   19,317    9,576   9,741     3,884    1,923    1,961    4,404    2,177    2,227   
30-34   22,025   10,884  11,141     4,409    2,176    2,233    5,075    2,508    2,567   
35-39   21,426   10,577  10,849     4,286    2,112    2,175    5,028    2,495    2,534   
40-44   19,117    9,404   9,713     3,854    1,877    1,977    4,512    2,228    2,284                      
45-64   49,550   23,904  25,646    10,393    4,962    5,432   11,782    5,709    6,073   
45-49   15,903    7,792   8,111     3,289    1,590    1,699    3,702    1,817    1,885   
50-54   12,725    6,184   6,541     2,655    1,275    1,380    3,035    1,478    1,557   
55-59   10,680    5,121   5,559     2,235    1,063    1,172    2,576    1,240    1,336   
60-64   10,242    4,807   5,435     2,214    1,033    1,181    2,469    1,174    1,295   
65+     32,791   13,293  19,498     7,199    2,844    4,354    8,060    3,241    4,819   
65-69   10,020    4,509   5,511     2,167      964    1,203    2,414    1,103    1,311   
70-74    8,632    3,727   4,906     1,897      801    1,096    2,046      877    1,169   
75-79    6,501    2,602   3,899     1,437      558      879    1,617      640      978   
80-84    4,268    1,509   2,759       944      321      624    1,077      375      702   
85+      3,369      946   2,424       753      200      553      906      247      659   
        
                  West                         South         
 ------------------------------------------------------------
 Age     Total    Male   Female     Total    Male    Female	
 ------------------------------------------------------------
 All    55,557  27,543   28,014    88,648   42,768  45,881
                                  
 0-14   13,216   6,770   6,445 	   19,554   10,000   9,554
  0-4    4,786   2,449   2,337      6,734    3,442   3,292
  5-9    4,273   2,189   2,084      6,361    3,252   3,109
 10-14   4,156   2,132   2,024      6,458    3,305   3,153
		          
 15-44  26,087  13,216  12,870     40,443   19,884  20,559
 15-19   3,687   1,904   1,783      6,097    3,101   2,996    
 20-24   3,897   2,003   1,893      6,416    3,147   3,269    
 25-29   4,410   2,241   2,169      6,619    3,235   3,385    
 30-34   5,043   2,539   2,504      7,498    3,662   3,836    
 35-39   4,821   2,416   2,405      7,289    3,554   3,736    
 40-44   4,227   2,112   2,115      6,524    3,186   3,337    
      		             
 45-64  10,082   4,950   5,132      17,292    8,283   9,009
 45-49   3,403   1,696   1,708       5,508    2,689   2,820    
 50-54   2,609   1,293   1,316       4,426    2,139   2,288    
 55-59   2,112   1,032   1,080       3,757    1,786   1,972    
 60-64   1,958     929   1,029       3,600    1,670   1,930    
		                 
 65+     6,173   2,606   3,566      11,360    4,601   6,758	      
 65-69   1,923     871   1,052       3,517    1,571   1,946	        
 70-74   1,659     741     918       3,029    1,307   1,723	        
 75-79   1,221     518     703       2,227      888   1,339	        
 80-84     775     296     479       1,472      518     954	        
 85+       595     181     414       1,115      318     797	        
			                
  
Civilian Population of the United States, July 1, 1993.  Estimates by Age, Sex, 
and Race  (Consistent with the 1990 Census, as enumerated.)
---------------------------------------------------------------------------------------------------- 
            All races                  White                      Black                    Other races
       Total  Male  Female     Total    Male   Female     Total   Male   Female    Total   Male   Female
 Age
                        Civilian population in thousands
---------------------------------------------------------------------------------------------------
Total 256,436 124,592 131,843  213,621 104,252 109,369  31,888 15,022 16,866   10,927  5,318  5,609
                                            
 0-4   19,705  10,078   9,627   15,584  7,987   7,597  3,130   1,585 1,545      990    506    485
  0     3,920   2,003   1,917    3,082  1,578   1,504    627     318   309      210    107    103
  1     3,964   2,025   1,938    3,136  1,605   1,531    625     316   308      203    104     99
  2     3,981   2,037   1,944    3,157  1,618   1,539    623     316   307      201    102     98
  3     3,964   2,029   1,935    3,151  1,616   1,534    623     315   308      191     98     93
  4     3,875   1,984   1,891    3,058  1,569   1,489    632     320   312      186     95     91                                           
 5-9   18,519   9,483   9,036   14,780   7,585   7,195   2,844  1,442  1,402     896    456    439
  5     3,785   1,938   1,847     3,000  1,540   1,461     600    304    296     185     95     90
  6     3,727   1,908   1,820     2,977  1,526   1,451     575    292    283     175     90     86
  7     3,723   1,906   1,817     2,981  1,530   1,451     565    286    279     178     91     87
  8     3,570   1,827   1,743     2,861  1,468   1,393     536    272    264     173     87     85
  9     3,714   1,904   1,810     2,962  1,522   1,439     567    288    279     185     94     91                                         
 10-14 18,529   9,492   9,037   14,750   7,576   7,174   2,841  1,440  1,402     937    476    462
  10    3,809   1,954   1,855    3,041   1,564   1,477     575    292    283     193     98     95
  11    3,760   1,925   1,834    3,004   1,543   1,462     570    288    281     186     94     91
  12    3,678   1,882   1,796    2,925   1,501   1,424     562    285    278     191     97     95
  13    3,719   1,903   1,816    2,955   1,517   1,439     576    291    284     188     95     93
  14    3,563   1,827   1,736    2,825   1,452   1,373     558    283    275     179     91     88                                                
 15-19 17,172   8,776   8,396   13,685   7,012   6,673   2,649  1,336  1,313     838    427    411
  15    3,492   1,792   1,700    2,773   1,427   1,346     546    277    269     173     88     85
  16    3,482   1,792   1,690    2,773   1,430   1,343     543    277    266     166     85     81
  17    3,403   1,754   1,649    2,713   1,402   1,311     521    266    255     169     87     82
  18    3,366   1,715   1,650    2,693   1,376   1,317     513    258    256     159     81     78
  19    3,429   1,723   1,706    2,732   1,378   1,355     526    260    267     171     86     85                                                
 20-24 18,284   9,125   9,159   14,752   7,404   7,348   2,594  1,247  1,346     938    473    465
  20    3,465   1,734   1,731    2,761   1,388   1,373     529    259    271     175     88     87
  21    3,596   1,797   1,799    2,874   1,442   1,432     535    260    275     187     95     92
  22    3,767   1,875   1,892    3,042   1,522   1,520     531    254    276     194     98     96
  23    3,740   1,865   1,875    3,040   1,526   1,514     509    242    267     191     97     94
  24    3,716   1,854   1,862    3,035   1,527   1,508     490    232    258     191     96     96                                                
 25-29 19,317   9,576   9,741   15,755   7,887   7,869   2,608  1,223   1,385    954    467    487
  25    3,624   1,805   1,820    2,943   1,479   1,464     495    233     262    186     93     93
  26    3,681   1,822   1,859    3,002   1,499   1,502     497    233     264    182     89     93
  27    3,807   1,887   1,920    3,095   1,549   1,546     522    245     277    190     93     97
  28    3,823   1,890   1,933    3,135   1,565   1,570     506    237     269    182     88     94
  29    4,381   2,173   2,208    3,580   1,794   1,786     587    275     312    214    104    110
 30-34 22,025  10,884  11,141   18,219   9,104   9,115   2,769  1,280   1,489  1,037    500    537
  30    4,364   2,157   2,207    3,594   1,796   1,799     560    260     300    209    101    108
  31    4,353   2,151   2,201    3,601   1,799   1,802     549    255     295    202     98    105
  32    4,388   2,165   2,222    3,637   1,815   1,821     541    249     292    210    101    108
  33    4,409   2,173   2,236    3,656   1,823   1,833     549    252     296    204     98    107
  34    4,512   2,237   2,275    3,731   1,872   1,860     569    263     306    212    102    109
 35-39 21,426  10,577  10,849   17,834   8,901   8,933   2,620  1,212   1,408    971    464    507
  35    4,488   2,221   2,267    3,728   1,864   1,864     553    257     296    207    100    107
  36    4,380   2,163   2,217    3,650   1,822   1,828     536    247     289    194     93    101
  37    4,258   2,097   2,161    3,534   1,760   1,774     526    242     284    198     94    104
  38    3,982   1,960   2,022    3,323   1,655   1,668     480    220     259    179     84     94
  39    4,318   2,137   2,182    3,599   1,800   1,799     526    245     281    193     92    101                                                
 40-44 19,117   9,404   9,713   16,064   7,994   8,071   2,205  1,015   1,190    848    396    452
  40    4,076   2,006   2,069    3,416   1,701   1,715     474    218     256    185     87     98
  41    3,908   1,921   1,987    3,288   1,636   1,652     449    205     244    171     80     91
  42    3,734   1,835   1,900    3,132   1,557   1,575     434    199     235    168     79     89
  43    3,670   1,799   1,871    3,069   1,523   1,546     429    197     232    172     79     93
  44    3,729   1,843   1,886    3,158   1,577   1,581     419    195     223    152     71     81 
 45-49 15,903   7,792   8,111   13,633   6,747   6,886   1,626    740     886    644    305    340
  45    3,640   1,790   1,850    3,106   1,543   1,562     385    177     208    149     69     80
  46    3,798   1,868   1,931    3,306   1,642   1,664     355    162     193    137     64     73
  47    2,784   1,358   1,426    2,357   1,162   1,195     298    134     164    129     62     68
  48    2,710   1,321   1,389    2,325   1,145   1,180     275    124     151    111     52     58
  49    2,971   1,455   1,515    2,539   1,255   1,284     313    143     169    119     57     62                                                
 50-54 12,725   6,184   6,541   10,952   5,373   5,579   1,297    583     714    475    227    248
  50    3,042   1,487   1,556    2,642   1,303   1,340     291    132     159    110     53     57
  51    2,563   1,248   1,316    2,200   1,081   1,119     266    120     146     97     46     51
  52    2,422   1,176   1,246    2,084   1,022   1,063     245    110     135     93     44     48
  53    2,346   1,137   1,209    2,011     984   1,027     248    111     137     88     42     46
  54    2,351   1,137   1,214    2,015     984   1,031     247    111     137     88     42     46
 55-59 10,680   5,121   5,559    9,225   4,470   4,755   1,081    476     605    375    175    199
  55    2,249   1,082   1,166    1,921     933     988     244    109     135     84     40     44
  56    2,169   1,040   1,128    1,873     909     964     219     95     124     76     36     40
  57    2,169   1,039   1,131    1,870     905     965     223     98     125     76     36     40
  58    2,055     983   1,072    1,796     869     928     192     84     108     66     31     36
  59    2,039     976   1,063    1,765     854     911     202     90     113     72     33     39
 60-64 10,242   4,807   5,435    8,940   4,243   4,697     984    424     560    318    140    178
  60    2,000     940   1,060    1,730     822     908     202     88     114     68     30     38
  61    1,980     933   1,047    1,727     824     903     191     82     109     62     28     35
  62    2,061     966   1,095    1,797     852     946     199     86     114     65     29     36
  63    2,090     988   1,102    1,838     878     959     191     82     108     61     27     34
  64    2,111     980   1,131    1,848     867     981     201     87     114     62     26     35                                                 
 65-69 10,020   4,509   5,511    8,865   4,019    4,847     891    377     514    264    113    150
  65    2,122     975   1,147    1,859     863      996     204     87     117     59     25     34
  66    2,036     924   1,112    1,794     819      975     188     82     106     54     23     31
  67    1,989     895   1,095    1,754     796      958     183     76     107     52     22     30
  68    1,942     864   1,078    1,731     774      956     162     69      93     49     21     28
  69    1,932     851   1,080    1,728     766      962     155     64      91     49     21     27                                                 
 70-74  8,632   3,727   4,906    7,740   3,360    4,380     695    279     416    197     88    110
  70    1,853     813   1,040    1,650     728      922     156     64      93     47     22     26
  71    1,854     809   1,045    1,665     731      934     147     59      88     42     19     23
  72    1,798     785   1,013    1,617     710      907     139     56      83     42     19     23
  73    1,605     682     922    1,440     616      825     130     52      78     35     15     20
  74    1,522     637     885    1,369     576      793     122     48      74     31     13     18                                                 
 75-79  6,501   2,602   3,899    5,879   2,364    3,515     499    185     314    123     54     70
  75    1,440     593     847    1,300     538      762     113     44      69     28     12     16
  76    1,354     554     800    1,229     506      723     100     38      62     25     11     14
  77    1,290     518     772    1,170     472      697      95     35      60     25     11     14
  78    1,257     492     765    1,138     448      690      95     34      62     23     10     13
  79    1,161     445     715    1,043     401      642      95     34      61     22     10     12                                                 
 80-84  4,268   1,509   2,759    3,886   1,372    2,514     312    106     206     71     31     39
  80    1,044     387     657      946     351      594      80     28      53     18      8     10
  81      928     338     590      848     308      540      65     23      42     15      7      8
  82      841     294     546      767     268      498      61     20      40     14      6      8
  83      769     262     507      701     238      463      56     19      37     12      5      7
  84      686     228     458      625     206      419      50     16      33     11      5      6
 85+    3,369     946   2,424    3,076     855    2,221     243     71     172     50     20     30
  0-14  56,753 29,053  27,700   45,115    23,149  21,966   8,815  4,467   4,349  2,823  1,438  1,385
 15-44 117,341 58,342  58,999   96,310    48,301  48,008  15,445  7,313   8,132  5,586  2,727  2,859
 45-64  49,550 23,904  25,646   42,750    20,833  21,917   4,988  2,224   2,764  1,812    847    965
                                                 
 15+  199,683  95,539 104,144   168,506  81,104   87,403  23,072 10,555  12,517  8,104  3,880  4,224
 45+  82,341   37,197  45,144    72,197  32,802   39,394   7,627  3,242   4,385  2,517  1,153  1,364
 65+  32,791   13,293  19,498    29,447  11,969   17,477   2,639  1,018   1,621    705    306    400
 75+  14,139    5,057   9,081    12,841   4,591    8,250   1,053    362     692    244    105    139                           
					  
APPENDIX  D
1.  UNWEIGHTED FREQUENCIES FOR SELECTED VARIABLES:  NEWBORN INFANTS
  SURVEY YEAR
                             Cumulative  Cumulative
        Frequency   Percent   Frequency    Percent
 --------------------------------------------------
   93      25003     100.0       25003      100.0
 UNITS FOR AGE
                                Cumulative  Cumulative
           Frequency   Percent   Frequency    Percent
 ---------------------------------------------------
     3      25003     100.0       25003      100.0
 SEX OF DISCHARGED PATIENT
                             Cumulative  Cumulative
        Frequency   Percent   Frequency    Percent
 -------------------------------------------------
   1      12920      51.7       12920       51.7
   2      12083      48.3       25003      100.0
 RACE OF DISCHARGED PATIENT
                             Cumulative  Cumulative
        Frequency   Percent   Frequency    Percent
 --------------------------------------------------
    1      13621      54.5       13621       54.5
    2       3726      14.9       17347       69.4
    3        121       0.5       17468       69.9
    4        948       3.8       18416       73.7
    5       2061       8.2       20477       81.9
    9       4526      18.1       25003      100.0

  MARITAL STATUS OF DISCHARGED PATIENT
                                 Cumulative  Cumulative
            Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
       2      25003     100.0       25003      100.0
 DISCHARGE STATUS
                           Cumulative  Cumulative
      Frequency   Percent   Frequency    Percent
 ------------------------------------------------
  1      24070      96.3       24070       96.3
  2         12       0.0       24082       96.3
  3        329       1.3       24411       97.6
  4         26       0.1       24437       97.7
  5        228       0.9       24665       98.6
  6         96       0.4       24761       99.0
  9        242       1.0       25003      100.0
 CENSUS REGION FOR HOSPITAL
                               Cumulative  Cumulative
          Frequency   Percent   Frequency    Percent
 ----------------------------------------------------
      1       5747      23.0        5747       23.0
      2       6259      25.0       12006       48.0
      3       8711      34.8       20717       82.9
      4       4286      17.1       25003      100.0
                                            
 BEDSIZE CLASSIFICATION FOR HOSPITAL
                                Cumulative  Cumulative
           Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
     1          2748      11.0        2748       11.0
     2          4978      19.9        7726       30.9
     3          6503      26.0       14229       56.9
     4          6965      27.9       21194       84.8
     5          3809      15.2       25003      100.0
 OWNERSHIP OF HOSPITAL
                                  Cumulative  Cumulative
             Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
    1          2715      10.9        2715       10.9
    2          2405       9.6        5120       20.5
    3         19883      79.5       25003      100.0
 PRINCIPAL EXPECTED SOURCE OF PAYMENT
                             Cumulative  Cumulative
        Frequency   Percent   Frequency    Percent
 ---------------------------------------------------
    0         96       0.4          96        0.4
    2         95       0.4         191        0.8
    3       8429      33.7        8620       34.5
    4        396       1.6        9016       36.1
    5       3303      13.2       12319       49.3
    6       9163      36.6       21482       85.9
    7       1856       7.4       23338       93.3
    8       1117       4.5       24455       97.8
    9        548       2.2       25003      100.0
                                              
 SECONDARY EXPECTED SOURCE OF PAYMENT
                             Cumulative  Cumulative
        Frequency   Percent   Frequency    Percent
 ---------------------------------------------------
     0          2       0.1           2        0.1
     3        156       8.9         158        9.0
     4         74       4.2         232       13.2
     5         63       3.6         295       16.8
     6        146       8.3         441       25.1
     7        867      49.3        1308       74.4
     8        449      25.6        1757      100.0
 Frequency Missing = 23246
2. WEIGHTED FREQUENCIES FOR SELECTED VARIABLES:  NEWBORN INFANTS
 SURVEY YEAR
                              Cumulative  Cumulative
         Frequency   Percent   Frequency    Percent
 --------------------------------------------------
   93    3578666     100.0     3578666      100.0
 UNITS FOR AGE
                              Cumulative  Cumulative
         Frequency   Percent   Frequency    Percent
 ---------------------------------------------------
     3    3578666     100.0     3578666      100.0
 SEX OF DISCHARGED PATIENT
                           Cumulative  Cumulative
      Frequency   Percent   Frequency    Percent
 -------------------------------------------------
   1    1823043      50.9     1823043       50.9
   2    1755623      49.1     3578666      100.0
 RACE OF DISCHARGED PATIENT
                             Cumulative  Cumulative
        Frequency   Percent   Frequency    Percent
 --------------------------------------------------
    1    2056657      57.5     2056657       57.5
    2     439955      12.3     2496612       69.8
    3      20589       0.6     2517201       70.3
    4     106826       3.0     2624027       73.3
    5     191094       5.3     2815121       78.7
    9     763545      21.3     3578666      100.0
 MARITAL STATUS OF DISCHARGED PATIENT
                                 Cumulative  Cumulative
            Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
       2    3578666     100.0     3578666      100.0
                                                 
 DISCHARGE STATUS
                          Cumulative  Cumulative
     Frequency   Percent   Frequency    Percent
 ------------------------------------------------
  1    3419972      95.6     3419972       95.6
  2       1756       0.0     3421728       95.6
  3      44224       1.2     3465952       96.9
  4       2266       0.1     3468218       96.9
  5      43352       1.2     3511570       98.1
  6      11333       0.3     3522903       98.4
  9      55763       1.6     3578666      100.0
 CENSUS REGION FOR HOSPITAL
                              Cumulative  Cumulative
         Frequency   Percent   Frequency    Percent
 ----------------------------------------------------
      1     689268      19.3      689268       19.3
      2     793118      22.2     1482386       41.4
      3    1289740      36.0     2772126       77.5
      4     806540      22.5     3578666      100.0
 BEDSIZE CLASSIFICATION FOR HOSPITAL
                              Cumulative  Cumulative
         Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
 1           617192      17.2      617192       17.2
 2           770368      21.5     1387560       38.8
 3           746027      20.8     2133587       59.6
 4           982885      27.5     3116472       87.1
 5           462194      12.9     3578666      100.0
 OWNERSHIP OF HOSPITAL
                              Cumulative  Cumulative
         Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
 1           468347      13.1      468347       13.1
 2           471486      13.2      939833       26.3
 3          2638833      73.7     3578666      100.0
                                     
 PRINCIPAL EXPECTED SOURCE OF PAYMENT
                              Cumulative  Cumulative
         Frequency   Percent   Frequency    Percent
 ---------------------------------------------------
     0      19301       0.5       19301        0.5
     2      30581       0.9       49882        1.4
     3    1130402      31.6     1180284       33.0
     4      89375       2.5     1269659       35.5
     5     398125      11.1     1667784       46.6
     6    1379357      38.5     3047141       85.1
     7     254413       7.1     3301554       92.2
     8     159287       4.5     3460841       96.7
     9     117825       3.3     3578666      100.0
 SECONDARY EXPECTED SOURCE OF PAYMENT
                              Cumulative  Cumulative
         Frequency   Percent   Frequency    Percent
 ---------------------------------------------------
     0        316       0.2         316        0.2
     3      35073      17.1       35389       17.3
     4       8296       4.0       43685       21.3
     5      11113       5.4       54798       26.7
     6      18392       9.0       73190       35.7
     7      74446      36.3      147636       72.0
     8      57705      28.1   	 205341	     100.0
 Frequency Missing = 3373325
3. UNWEIGHTED FREQUENCIES FOR SELECTED VARIABLES:  NON-NEWBORNS
 SURVEY YEAR
                                 Cumulative  Cumulative 
	 Frequency    Percent    Frequency    Percent
 -------------------------------------------------------
  93     210408        100.0      210408       100.0
 UNITS FOR AGE
                                  Cumulative   Cumulative
         Frequency    Percent      Frequency    Percent
 --------------------------------------------------------
   1      205439        97.6        205439        97.6
   2        3466         1.6        208905        99.3
   3        1503         0.7        210408       100.0
 
 SEX OF DISCHARGED PATIENT
                                 Cumulative   Cumulative
         Frequency   Percent      Frequency    Percent
 -------------------------------------------------------
   1       83601        39.7         83601        39.7
   2      126807        60.3        210408       100.0
 RACE OF DISCHARGED
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
   1      129737       61.7       129737          61.7
   2       27859       13.2       157596          74.9
   3         623        0.3       158219          75.2
   4        3883        1.8       162102          77.0
   5        7668        3.6       169770          80.7
   9       40638       19.3       210408         100.0
   
 MARITAL STATUS OF DISCHARGED PATIENT
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
    1       35831       17.0          35831        17.0
    2       29596       14.1          65427        31.1
    3       10852        5.2          76279        36.3
    4        4334        2.1          80613        38.3
    5        1033        0.5          81646        38.8
    6       23956       11.4         105602        50.2
    9      104806       49.8         210408       100.0
 
 DISCHARGE STATUS
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
    1    170833        81.2        170833         81.2
    2      2145         1.0        172978         82.2
    3      5332         2.5        178310         84.7
    4     13216         6.3        191526         91.0
    5     10190         4.8        201716         95.9
    6      6203         2.9        207919         98.9
    9      2489         1.2        210408        100.0
 CENSUS REGION FOR HOSPITAL
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
    1      57169       27.2        57169          27.2
    2      56784       27.0       113953          54.2
    3      72347       34.4       186300          88.5
    4      24108       11.5       210408         100.0
 BEDSIZE CLASSIFICATION FOR HOSPITAL
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
    1     27316        13.0         27316         13.0
    2     37352        17.8         64668         30.7
    3     53963        25.6        118631         56.4
    4     62635        29.8        181266         86.1
    5     29142        13.9        210408        100.0 
 OWNERSHIP OF HOSPITAL
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
    1    25144          12.0       25144          12.0
    2    19927           9.5       45071          21.5
    3   165337          78.6      210408         100.0
 PRINCIPAL EXPECTED SOURCE OF PAYMENT
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
    0         904        0.4           904        0.4
    1        2777        1.3          3681        1.7
    2       76003       36.1         79684       37.8
    3       31990       15.2        111674       53.0
    4        2939        1.4        114613       54.4
    5       21792       10.4        136405       64.8
    6       54092       25.7        190497       90.5
    7       10321        4.9        200818       95.4
    8        5594        2.7        206412       98.1
    9        3996        1.9        210408      100.0
 SECONDARY EXPECTED SOURCE OF PAYMENT
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
-------------------------------------------------------
   0           34        0.1           34         0.1
   2           43        0.1           77         0.2
   3         5962       14.9         6039        15.1
   4          538        1.3         6577        16.4
   5         9703       24.3        16280        40.7
   6        13380       33.5        29660        74.2
   7         5827       14.6        35487        88.8
   8         4495       11.2        39982       100.0
 Frequency Missing = 170426

4. WEIGHTED FREQUENCIES FOR SELECTED VARIABLES:  NON-NEWBORNS
  SURVEY YEAR
                                   Cumulative   Cumulative
         Frequency    Percent      Frequency     Percent
 ---------------------------------------------------------
   93    30825148      100.0       30825148       100.0
  
 UNIT FOR AGE
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
   1     30114704       97.7      30114704        97.7
   2       488447        1.6      30603151        99.3
   3       221997        0.7      30825148       100.0
 SEX OF DISCHARGED PATIENT
                                 Cumulative   Cumulative
         Frequency    P
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
   1     12262445        39.8     12262445         39.8
   2     18562703        60.2     30825148        100.0
 RACE OF DISCHARGED PATIENT
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
   1     20101017       65.2      20101017        65.2
   2      3659646       11.9      23760663        77.1
   3       113918        0.4      23874581        77.5
   4       480132        1.6      24354713        79.0
   5       658611        2.1      25013324        81.1
   9      5811824       18.9      30825148       100.0
 MARITAL STATUS OF DISCHARGED PATIENT
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
   1     9274698        30.1       9274698        30.1
   2     5855328        19.0      15130026        49.1
   3     2915257         9.5      18045283        58.5
   4     1140558         3.7      19185841        62.2
   5      225020         0.7      19410861        63.0
   6     2328291         7.6      21739152        70.6
   9     9085996        29.5      30825148       100.0
 DISCHARGE STATUS
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
   1     25131675       81.5      25131675        81.5
   2       269602        0.9      25401277        82.4
   3       956859        3.1      26358136        85.5
   4      1866109        6.1      28224245        91.6
   5      1207594        3.9      29431839        95.5
   6       844412        2.7      30276251        98.2
   9       548897        1.8      30825148       100.0
 CENSUS REGION FOR HOSPITAL
                                 Cumulative   Cumulative
         Frequency    Percent     Frequency     Percent
 -------------------------------------------------------
   1     6964731        22.6      6964731        22.6
   2     7097084        23.0     14061815        45.6
   3    11580414        37.6     25642229        83.2
   4     5182919        16.8     30825148       100.0
 BEDSIZE CLASSIFICATION FOR HOSPITAL
 
                                Cumulative   Cumulative
         Frequency    Percent    Frequency     Percent
 -------------------------------------------------------
   1       6204477      20.1      6204477       20.1
   2       7391842      24.0     13596319       44.1
   3       6386830      20.7     19983149       64.8
   4       7361449      23.9     27344598       88.7
   5       3480550      11.3     30825148      100.0
 OWNERSHIP OF HOSPITAL
                               Cumulative  Cumulative
          Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
 1          3344553      10.9     3344553       10.9
 2          3698234      12.0     7042787       22.9
 3         23782361      77.2    30825148      100.0
 PRINCIPAL EXPECTED SOURCE OF PAYMENT
                                Cumulative  Cumulative
           Frequency   Percent   Frequency    Percent
 ---------------------------------------------------
     0     123559       0.4      123559        0.4
     1     387938       1.3      511497        1.7
     2   11657089      37.8    12168586       39.5
     3    4530519      14.7    16699105       54.2
     4     545761       1.8    17244866       55.9
     5    2700341       8.8    19945207       64.7
     6    7748178      25.1    27693385       89.8
     7    1504793       4.9    29198178       94.7
     8     925447       3.0    30123625       97.7
     9     701523       2.3    30825148      100.0
 SECONDARY EXPECTED SOURCE OF PAYMENT
                              Cumulative  Cumulative
         Frequency   Percent   Frequency    Percent
 ---------------------------
     0       3933       0.1        3933        0.1
     2      12232       0.2       16165        0.3
     3    1317666      19.0     1333831       19.3
     4     144430       2.1     1478261       21.4
     5    1658471      23.9     3136732       45.3
     6    2710129      39.0     5846861       84.3
     7     558461       8.0     6405322       92.3
     8     541902       7.8     6947224      100.0
 Frequency Missing = 23877924




This page last reviewed: Thursday, January 28, 2016
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