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Scientific Data Documentation
National Hospital Discharge Survey, 1992

DSN: CC36.NHDS94

Abstract


1994 NATIONAL HOSPITAL DISCHARGE SURVEY(NHDS)
PUBLIC USE DATA TAPE DOCUMENTATION

This material provides documentation for users of the 1994 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 1994 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 1994 the sample consisted of 
525 hospitals.  Of the 525 hospitals, 13 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 512 inscope (eligible) hospitals, 
478 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 62 percent of the
responding hospitals.   The second was an automated method, used for approximately 38
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 1994, 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 1994 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 October 1 of the calendar year.  A list of the
changes for 1986 through 1993 are listed in Appendix B.  All coding of the 1994 data is
consistent with the ICD-9-CM and the addendum effective October 1, 1993.  Information
provided by automated systems for the last three months of 1994 which was coded using
the October 1994 addendum was converted back to the previous code assignment.  This
was done in order to prevent NHDS data users from mistaking partial year estimates for
annual estimates. 

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

Population Estimates--Appendix C shows population estimates provided by the U.S.
Bureau of the Census.  The estimates are of the U.S. civilian resident population on July
l of the data year.  These population estimates are consistent with those published in
Current Population Reports, Series P-25; however, they are not official population
estimates of the Bureau of the Census.

Measurement Errors--As in any survey, results are subject to nonsampling or measurement
errors, which include errors due to hospital nonresponse, missing abstracts, information
incompletely or inaccurately recorded on abstract forms, and processing errors.  A very
small proportion, (less than one-half of one percent) of the discharge records failed to
include the sex, age, or date of birth of the patient. If the hospital record did not state
either the age or sex of patient, it was imputed by assigning an age or sex consistent with
the age or sex of other sampled patients with the same diagnostic code. In a very few cases
(about a quarter of a percent of the records), the age or sex was edited, because it was
inconsistent with the diagnosis.  Data on race was missing for 20.4 percent of the
discharges, and no attempt was made to impute for these missing values.

During 1994, 10.1 percent of the records lacked the day of admission or day of discharge,
but included a length of stay and a discharge month.  For these records, a discharge day
of the 20th of the month was assigned to the record and the admission date was computed
based on the given length of stay.  Other edit and imputation procedures may have been
applied to data in the NHDS collected in automated form.

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

Relative Standard Errors for Aggregate Estimates

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

RSE(X)= 100 * SQRT{a+b/X} 

with a and b provided in Table 1.

For example, in 1994 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 248,000.  Using the applicable constants from Table 1 for estimates by sex
produces:

RSE(248,000)= 100 * SQRT{.001196 + (407.831/248,000)}

RSE(248,000) = 5.33%

The relative standard error for the estimate of interest is 5.33 percent.  From this the
standard error is obtained by multiplying the relative standard error by the estimate:

SE(248,000) = 248,000 * 5.33% = 13,218     

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:

          (248,000 - 2 * 13,218)<-> (248,000 + 2 * 13,218)

                     221,563  <-> 274,436

Relative Standard Error for Estimates of Percents

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

RSE(p) = 100 * SQRT{b *(1 - p)/(p * X)} 

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

For example, in 1994 the estimated number of discharges from short-stay hospitals which
were female was 18,550,000.  This is 60.14 percent of the estimated 30,843,000
discharges for that year.  Using the applicable constants from Table 1 for estimates by sex
produces:

RSE(.6014) =  100 *  SQRT{407.831  *(1 - .6014)/(.6014 * 30,843,000)} 

RSE(.6014) = 0.300%

The relative standard error for the estimate of interest is 0.300 percent.  From this the
standard error is obtained by multiplying the relative standard error by the estimate:

SE(.6014) = .6014 * 0.300% = 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:

(.6014 - 2*0.0018) <-> (.6014 + 2*0.0018)

.5978   <->  .6050

or, equivalently,   59.8%  <->   60.5%

 

Table 1.  Parameter values for relative standard errors for National Hospital 
          Discharge Survey aggregate statistics by statistic type:  
          United States, 1994

Parameter Estimates for Number of First-Listed Diagnoses -- 1994 NHDS

Parameter Estimates for Number of First-Listed Diagnoses -- 1994 NHDS
		a		b
TOTAL		0.001642		807.099
MALE		0.004199		232.683
FEMALE		0.001196		407.831
UNDER 15 YEARS		0.033904		88.459
15-44 YEARS		0.001355		325.536
45-64 YEARS		0.003443		144.077
65 YEARS & OVER		0.003663		213.177
NORTHEAST REGION		0.003700		231.538
MIDWEST REGION		0.011139		199.629
SOUTH REGION		0.005975		851.312
WEST REGION		0.004110		444.032
WHITE RACE		0.003048		795.143
BLACK RACE		0.005726		312.089
ALL OTHER RACES		0.032602		183.680
RACE NOT STATED		0.016678		348.098
WORKER'S COMPENSATION		0.009465		334.758
MEDICARE		0.007143		399.337
MEDICAID		0.002847		1,340.623
PAYMENT NOT STATED		0.038482		502.656
OTHER GOVT PAYMENTS		0.016207		1,162.316
PRIVATE INSURANCE		0.000749		6,531.615
SELF PAY		-0.001758		2,179.359
NO CHARGE/OTHER PYMTS		0.016969		477.066
Parameter Estimates for Number of Days of Care -- 1994 NHDS
		a		b
TOTAL		0.001678		2,239.645
MALE		0.001902		2,074.208
FEMALE		0.001921		1,904.589
UNDER 15 YEARS		0.027786		274.185
15-44 YEARS		0.002015		1,667.222
45-64 YEARS		0.016972		447.267
65 YEARS & OVER		0.005215		2,672.346
NORTHEAST REGION		0.004962		1,276.736
MIDWEST REGION		0.005650		436.024
SOUTH REGION		0.014017		1,788.231
WEST REGION		0.007948		982.092
WHITE RACE		0.003794		1,804.053
BLACK RACE		0.009285		1,268.104
ALL OTHER RACES		0.040785		140.189
RACE NOT STATED		0.017550		748.891
WORKER'S COMPENSATION		0.010084		2,952.472
MEDICARE		0.005961		5,047.630
MEDICAID		0.003669		8,111.858
PAYMENT NOT STATED		0.063155		2,766.419
OTHER GOVT PAYMENTS		0.022304		4,475.063
PRIVATE INSURANCE		-0.000205		45,850.000
SELF PAY		0.000904		11,039.000
NO CHARGE/OTHER PYMTS		0.015562		2,805.914
Parameter Estimates for Number of All-Listed Diagnoses -- 1994 NHDS
		a		b
TOTAL		0.001270		749.175
MALE		0.003304		210.282
FEMALE		0.001219		522.273
UNDER 15 YEARS		0.024145		193.467
15-44 YEARS		0.001469		408.901
45-64 YEARS		0.010954		122.406
65 YEARS & OVER		0.001391		365.947
NORTHEAST REGION		0.005025		299.925
MIDWEST REGION		0.008153		383.231
SOUTH REGION		0.005967		727.599
WEST REGION		0.008194		601.016
WHITE RACE		0.002804		780.181
BLACK RACE		0.005818		292.282
ALL OTHER RACES		0.029444		255.096
RACE NOT STATED		0.016209		452.444
WORKER'S COMPENSATION		0.008197		1,219.246
MEDICARE		0.004144		1,533.890
MEDICAID		0.001943		7,185.332
PAYMENT NOT STATED		0.043284		2,178.283
OTHER GOVT PAYMENTS		0.025558		2,570.221
PRIVATE INSURANCE		0.005100		29,862.000
SELF PAY		0.000026		7,838.290
NO CHARGE/OTHER PYMTS		0.020395		810.491
Parameter Estimates for Number of All-Listed Procedures - NHDS 1994
		a		b
TOTAL		0.001746		435.521
MALE		0.005950		215.062
FEMALE		0.002395		453.275
UNDER 15 YEARS		0.023845		195.642
15-44 YEARS		0.004720		392.802
45-64 YEARS		0.021146		78.880
65 YEARS & OVER		0.006299		252.090
NORTHEAST REGION		0.009079		170.128
MIDWEST REGION		0.014664		447.980
SOUTH REGION		0.012353		775.159
WEST REGION		0.012502		508.682
WHITE RACE		0.005990		661.665
BLACK RACE		0.009092		273.826
ALL OTHER RACES		0.026285		177.522
RACE NOT STATED		0.015935		346.559
WORKER'S COMPENSATION		0.016211		478.214
MEDICARE		0.009764		761.909
MEDICAID		0.005034		1,964.349
PAYMENT NOT STATED		0.075294		500.779
OTHER GOVT PAYMENTS		0.023690		954.124
PRIVATE INSURANCE		0.005777		9,772.000
SELF PAY		0.010672		2,877.974
NO CHARGE/OTHER PYMTS		0.076350		572.066

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 1994
NHDS, 85 percent of the 478 responding hospitals provided data for all twelve months,
and 93 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, Babubhai.V., Beth G. Barnwell, and Gayle S. Bieler.  SUDAAN User's Manual:
   Software for Analysis of Correlated Data, Release 6.40.  Research Triangle Institute:
   Research Triangle Park, N.C. 1995.

II.  TECHNICAL DESCRIPTION OF TAPE

Data Set Name---------------------------------------------CC36.NHDS94
Number of REELS or CARTRIDGES---------------------------------------1
Number of Recording Tracks, REEL------------------------------------9
Number of Recording Tracks, CARTRIDGE------------------------------18
Density for REEL (bpi)------------------------------------------6,250
Density for CARTRIDGE (bpi)------------------------------------38,000
Language-------------------------------------------------------EBCDIC
Parity------------------------------------------------------------Odd
Record Length------------------------------------------------------81
Block Size------------------------------------------------------16200
Number of Records---------------------------------------------276,533



III.  RECORD FORMAT: Location and Coding of Data Elements

This section provides detailed information for each sampled record on the
tape, with a description of each item included in the record. Data elements
are arranged sequentially according to their physical location on the tape
record.  Unless otherwise stated in the Item Description, the data are derived
from the abstract form or from automated sources.  The SMG Hospital
Market Tape and the hospital interview are alternate sources of data; some
other items are computer generated.

Item       Tape        Number of
Number     Location    Positions   Item Description and Codes

  1            1-2        2         Survey Year: 94

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

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

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

  5             7         1         Sex:  1 = Male
                                          2 = Female

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

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

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

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

Item         Tape       Number of
Number      Location    Positions    Item Description and Codes

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

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

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

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

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

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

 Item        Tape       Number of
Number       Location   Positions    Item Description and Codes

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

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

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

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

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

  29         79-81          3        DRG, Grouper Version 11.0

-----------------------------------------------------------------------------
* 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 

The International Classification of Diseases, 9th Revision, Clinical Modification, which
has been used for coding NHDS data since 1979, undergoes annual updating.  Assignment of new
diagnostic and procedure codes, fourth and fifth digit expansion of codes, as well as code
deletions, are contained in addenda developed by the ICD-9-CM Coordination and Maintenance
Committee and approved by the Director of NCHS and the Administrator of the Health Care
Financing Administration.  Addenda to the ICD-9-CM become effective on October 1 of the
calendar year and have been released for 1986 through 1994. 

As described earlier in this document, the 1994 NHDS involved two data collection modes: 
manual and abstract service.  All data collected manually were coded using the third edition of the
ICD-9-CM, which includes the addenda for 1986 through 1993.  Data collected via abstract
service were coded using two different ICD-9-CM revisions.  For the first 9 months of 1994, the
ICD-9-CM including the addendum of October 1, 1986-93 was used; for the last 3 months the
October 1994 addendum was used.  Therefore, data provided by automated systems for the last
three months of 1994 was converted back to the code assignment under the October 1993
addendum.  This was done in order to prevent NHDS data users from mistaking partial year
estimates for annual estimates.    

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

DIAGNOSIS CODES			

Current code(s) 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	
			
077.98-077.99	1993             077.9	
		    	
078.10-078.11,  1993             078.1	
078.19			

078.88          1993            078.89	
			
079.4           1993             079.8	
079.50-079.53,  1993             079.8	
079.59
079.88-079.89	1993             079.8	
079.98-079.99	1993             079.9	
			
088.81,088.89	1989             088.8	
			
088.82          1993            088.89	
			
099.40-099.49   1992             099.4	
099.50-099.59   1992            078.89	
112.84-112.85   1992            112.89	
			
114.4-114.5     1993             114.3	
			
176.0-176.9     1991       173.0-173.9	
			
203.00          1991             203.0	
203.01          1991            V10.79	
203.10          1991             203.1	
203.11          1991            V10.79	
203.80          1991             203.8	
203.81          1991            V10.79	
			
204.00          1991             204.0	
204.01          1991            V10.61	
204.10          1991             204.1	
204.11          1991            V10.61	
204.20          1991             204.2	
204.21          1991            V10.61	
204.80          1991             204.8	
204.81          1991            V10.61	
204.90          1991             204.9	
204.91          1991            V10.61	
			
205.00          1991             205.0	
205.01          1991            V10.62	
205.10          1991             205.1	
205.11          1991            V10.62	
205.20          1991             205.2	
205.21          1991            V10.62	
205.30          1991             205.3	
205.31          1991            V10.62	
205.80          1991             205.8	
205.81          1991            V10.62	
205.90          1991             205.9	
205.91          1991            V10.62	
			
206.00          1991             206.0	
206.01          1991            V10.63	
206.10          1991             206.1	
206.11          1991            V10.63	
206.20          1991             206.2	
206.21          1991            V10.63	
206.80          1991             206.8	
206.81          1991            V10.63	
206.90          1991             206.9	
206.91          1991            V10.63	
			
207.00          1991             207.0	
207.01          1991            V10.69	
207.10          1991             207.1	
207.11          1991            V10.69	
207.20          1991             207.2	
207.21          1991            V10.69	
207.80          1991             207.8	
207.81          1991            V10.69	
			
208.00          1991             208.0	
208.01          1991            V10.60	
208.10          1991             208.1	
208.11          1991            V10.60	
208.20          1991             208.2	
208.21          1991            V10.60	
208.80          1991             208.8	
208.81          1991            V10.60	
208.90          1991             208.9	
208.91          1991            V10.60	
			
237.70-237.72   1990             237.7	
			
250.02          1993            250.90	
250.03          1993            250.91	
			
250.12          1993            250.10	
250.13          1993            250.11	
250.22          1993            250.20	
250.23          1993            250.21	
250.32          1993            250.30	
250.33          1993            250.31	
250.42          1993            250.40	
250.43          1993            250.41	
250.52          1993            250.50	
250.53          1993            250.51	
250.62          1993            250.60	
250.63          1993            250.61	
250.72          1993            250.70	
250.73          1993            250.71	
250.82          1993            250.80	
250.83          1993            250.81	
250.92          1993            250.90	
250.93          1993            250.91	
			
283.10-283.11,  1993             283.1
283.19	
	  		
320.81-320.89   1992             320.8	
			
337.20-337.22,  1993             337.9
337.29	
			
344.81-344.89   1993             344.8	
			
345.00-345.01   1989             345.0	
345.10-345.11   1989             345.1	
345.40-345.41   1989             345.4	
345.50-345.51   1989             345.5	
345.60-345.61   1989             345.6	
345.70-345.71   1989             345.7	
345.80-345.81   1989             345.8	
345.90-345.91   1989             345.9	
			
346.00-346.01   1992             346.0	
346.10-346.11   1992             346.1	
346.20-346.21   1992             346.2	
346.80-346.81   1992             346.8	
346.90-346.91   1992             346.9	
			
355.71          1993             354.4	
355.79          1993             355.7	
			
371.82          1992            371.89	
			
374.87          1990            374.89	
			
403.00-403.01   1989             403.0	
403.10-403.11   1989             403.1	
403.90-403.91   1989             403.9	
			
404.00-404.03   1989             404.0	
404.10-404.13   1989             404.1	
404.90-404.93   1989             404.9	
			
410.00-410.02   1989             410.0	
410.10-410.12   1989             410.1	
410.20-410.22   1989             410.2	
410.30-410.32   1989             410.3	
410.40-410.42   1989             410.4	
410.50-410.52   1989             410.5	
410.60-410.62   1989             410.6	
410.70-410.72   1989             410.7	
410.80-410.82   1989             410.8	
410.90-410.92   1989             410.9	
			
411.81          1989             410.9	
411.89          1989             411.8	
			
429.71          1989       410.0-410.9	
429.79          1989       410.0-410.9	
			
433.00-433.01   1993             433.0	
433.10-433.11   1993             433.1	
433.20-433.21   1993             433.2	
433.30-433.31   1993             433.3	
433.80-433.81   1993             433.8	
433.90-433.91   1993             433.9	
			
434.00-434.01   1993             434.0	
434.10-434.11   1993             434.1	
434.90-434.91   1993             434.9	
			
437.7           1992             780.9	
			
440.20-440.22   1992             440.2	
			
440.23          1993    440.20 & 707.1 
                     or 707.8 or 707.9	
440.24          1993    440.20 & 785.4	
440.29          1993            440.20	
			
441.6           1993     441.1 & 441.3	
441.7           1993     441.2 & 441.4	
			
446.20-446.21,  1990             446.2
446.29	
451.82-451.84   1993            451.89	
			
482.30-482.39   1992             482.3	
482.81-482.89   1992             482.8	
			
483.0           1992               483	
483.8           1992               483	
			
491.20-491.21   1991             491.2	
			
493.20          1989            493.90	
493.21          1989            493.91	
			
518.81          1987             799.1	
518.82-518.89   1987             518.8	
			
524.00-524.09   1992             524.0	
524.10-524.19   1992             524.1	
524.60-524.69   1991             524.6	
524.70-524.79   1992             524.8	
			
530.10-530.11,  1993             530.1	
530.19
530.18          1993             530.1	
530.82-530.84,  1993             530.8
530.89	
			
535.00-535.01   1991             535.0	
535.10-535.11   1991             535.1	
535.20-535.21   1991             535.2	
535.30-535.31   1991             535.3	
535.40-535.41   1991             535.4	
535.50-535.51   1991             535.5	
535.60-535.61   1991             535.6	
			
537.82          1990            537.89	
537.83          1991            537.82	
			
562.02          1991            562.00	
562.03          1991            562.01	
562.12          1991            562.10	
562.13          1991            562.11	
			
569.84          1990             557.1	
569.85          1991            569.84	
			
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,  1989	 651.00-651.01,
651.33                          651.03      
651.40-651.41,  1989     651.10-651.11,
651.43                          651.13
651.50-651.51,  1989     651.20-651.21,
651.53                          651.23
651.60-651.61,  1989     651.80-651.81,
651.63                          651.83
			
654.20-654.21,  1990       654.2,654.9
654.23	
654.90-651.94   1990       654.2,654.9	
			
657.0           1991               657	
			
659.60,659.61,  1992     659.80,659.81,	
659.63                          659.83

665.10,665.11   1992     665.10,665.11,	
                         665.12,665.14

Note: The title for the subcategory, 665.1 has been changed,     		
making the fifth-digit subclassification, 665.12 and 665.14 invalid.		

670.0           1991               670	
			
672.0           1991               672	
			
692.72-692.74   1992            692.79	
692.82-692.83   1992            692.89	
			
702.0-702.8     1991               702	
			
704.02          1993            704.09	
			
710.5           1992       288.3,729.1	
			
733.10-733.16,  1993             733.1	
733.19	
738.10-738.19   1992             738.1	
			
747.60-747.64,  1993             747.6	
747.69
747.82          1993            747.89	
			
753.10-753.17,  1990             753.1	
753.19	
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	
			
780.03          1993            780.01	
			
780.57          1992     780.51,780.53	
			
788.20-788.21,  1993             788.2	
788.29	
788.30-788.39   1992             788.3	
			
788.41-788.43   1993             788.4	
788.61-788.62,  1993             788.6	
788.69

790.91          1993             790.9	
790.92          1993             286.9	
790.93, 790.99  1993             790.9	
			
795.8           1986             795.7	
			
864.05          1992            864.09	
864.15          1992            864.19	
			
925.1-925.2     1993               925	
			
995.60-995.69   1993             995.0	
			
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	
			
V05.3-V05.4     1993             V05.8	
			
V07.4           1992             V07.8	
			
V09.0-V09.91    1993       No previous code assignments	
			
V25.43          1992            V25.49	
V25.5           1992             V25.8	
			
V29.0-V29.8     1992             V71.8	
V29.9           1992             V71.9	
			
V30.00-V30.01   1989             V30.0	
V31.00-V31.01   1989             V31.0	
V32.00-V32.01   1989             V32.0	
V33.00-V33.01   1989             V33.0	
V34.00-V34.01   1989             V34.0	
V35.00-V35.01   1989             V35.0	
V36.00-V36.01   1989             V36.0	
V37.00-V37.01   1989             V37.0	
V39.00-V39.0l   1989             V39.0	
			
V72.81-V72.85   1993             V72.8	
V73.88-V73.89   1993             V73.8	
V73.98-V73.99   1993             V73.9	

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 1/, 36.02
36.09	         1986	           36.0
36.09	         1991	          36.00 (Code Deleted)
			
37.26-37.27	 1988	          37.29
			
37.34	         1988	          37.33
			
37.70           (Leads only)      37.70
               1987(Leads/Device)               
37.71-37.72    (Leads only)	  37.74
               1987(Leads/Device)
37.73          (Leads only)       37.73
               1987(Leads/Device)
37.74          (Leads only)       37.76
               1987(Leads/Device)
37.75          (Leads only)       37.89
               1987(Leads/Device)
37.76          (Leads only)       37.81
               1987(Leads/Device)
37.77          (Leads only)       37.83-37.84
               1987(Leads/Device)
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            1987             37.73-37.77
(Device only)    (Leads/Device)
37.81            1987             37.73-37.77
(Device only)    (Leads/Device)
37.82            1987             37.73-37.77
(Device only)    (Leads/Device)
37.83            1987             37.73-37.77
(Device only)    (Leads/Device)
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            1986             38.44 (Entire Aorta)
(Abdominal Aorta only)
38.45            1986             38.44-38.45
(Thoracic Aorta only)
38.95            1989             38.93
			
39.28            1991             39.29
39.65            1988             39.61
39.66            1990             39.65
			
41.00-41.03      1988              41.0
			 
42.25            1988             42.24
42.33            1989	          42.32, 42.39
42.33            1990	          42.91
			
43.11            1989              43.1
43.19            1989              43.1, 43.2
43.41            1989             43.41,43.49
			
44.21            1986	           44.2
44.22            1986	          44.99
44.29            1986	           44.2
44.43            1989	          43.49,45.32
44.44            1989	          38.86
44.49            1989	           43.0
44.93-44.94      1986	          44.99
			
45.16            1988             45.14(45.15 before 1987)
45.30            1989             45.31,45.32
45.42            1988             45.41
45.43            1989             45.49
45.75            1988             48.66(Code Deleted)
(Hartmann resection added)
45.95            1987             45.93
			
46.13            1992             46.12(Code Deleted)
46.32            1989             46.39
46.85            1989             46.99
			
49.31            1989              49.3
49.39            1989              49.3
			
51.10            1989             51.97
51.11            1989             51.11,51.97 
51.14            1989             51.12
51.15            1989             51.97
51.22            1991             51.21 (Code Deleted),51.22 
51.23            1991             51.22
51.64            1989             51.69
51.84-51.88      1989             51.97
			
51.97            1986             52.91,51.99, or 51.82 
51.98            1986             51.99
			
52.13            1989             51.97,52.91 
52.14            1989             52.11
52.21            1989              52.2
52.22            1989              52.2
52.93            1989             52.93 + 52.91 
52.94            1989             52.09
52.97            1989             52.91
52.98            1989             52.91
52.99            1989             52.93,52.94,52.99 
			
54.24            1987	          54.23
			
54.25            1993             54.98
			
55.03-55.04      1986             55.02
			
56.33-56.34      1987             56.33
56.35            1987             45.12
			
57.17-57.18      1989             57.21
57.22            1989             57.22,57.82 
			
58.31            1990             58.3
58.39            1990             58.3
58.93            1986            57.99
			
59.96            1986            59.95
			
60.95            1991            60.99
			
64.97            1986            64.95
			
66.01            1992             66.0
66.02            1992            66.73
			
68.15            1987            68.14
68.16            1987            68.13
68.9             1992             68.4
			
74.3             1992            69.11 (Code Deleted)
			
77.56            1989            77.89,78.49,81.18 
77.57            1989            77.89,80.48,81.18,83.85 
77.58            1989            77.59,81.18 
			
78.10            1991            78.40
78.11            1991            78.41
78.12            1991            78.42
78.13            1991            78.43
78.14            1991            78.44
78.15            1991            78.45
78.16            1991            78.46
78.17            1991            78.47
78.18            1991            78.48
78.19            1991            78.49
78.20            1991            78.10,78.20,78.30
78.21            1991            78.11,78.31
78.22            1991            78.12,78.22,78.32
78.23            1991            78.13,78.23,78.33
78.24            1991            78.14,78.34
78.25            1991            78.15,78.25,78.35
78.27            1991            78.17,78.27,78.37
78.28            1991            78.18,78.38
78.29            1991            78.11,78.16,78.19,78.29,78.39
78.39            1991            78.31
			
78.90 2/         1987            78.40
78.91 2/         1987	         78.41
78.92 2/         1987            78.42
78.93 2/         1987            78.43
78.94 2/         1987            78.44
78.95 2/         1987            78.45
78.96 2/         1987            78.46
78.97 2/         1987            78.47
78.98 2/         1987            78.48
78.99 2/         1987            78.49
			
80.50-80.59      1986             80.5
			
81.03            1989            81.02
81.04-81.05      1989            81.03,81.04,81.05
81.06-81.07      1989            81.06,81.07
81.08            1989            81.06,81.07,81.08
81.09            1989            81.08
81.40            1989            81.69
81.51            1989            81.51,81.59
81.52            1989            81.61,81.62,81.63,81.64
81.53            1989            81.51,81.59,81.61,81.62,
                                 81.63,81.64
81.54-81.55      1989            81.41
81.56            1989            81.48
81.57            1989            81.31,81.39
81.59            1989            81.39
81.72            1989            81.79
81.73-81.74      1989            81.86
81.75            1989            81.87
81.79            1989            81.79,81.87
81.80            1989            81.81
81.97            1992            81.59
			
85.95            1987            85.99
85.96            1987            85.99
			
86.06            1987            86.09
86.07            1990            86.09
86.27            1986            86.22-86.23
86.28            1988            86.22
86.93            1987            86.89
			
88.90            1986            88.39
88.91            1986            89.15
88.92            1986            89.39
88.93            1986            89.15
88.94            1986            89.39
88.95            1986            89.29
88.97            1989            88.99
88.98            1989            88.90
88.99            1986            89.39
			
89.10            1989            89.15
89.17-89.18      1988            89.15
89.19            1989            89.15
89.50            1991            89.54
			
93.90            1988            93.92
			
94.61-94.69      1989            94.25
			
96.6             1986            96.35
96.70            1991            93.92 (Code Deleted)
96.71            1991            93.92 (Code Deleted)
96.72            1991            93.92 (Code Deleted)
			
97.05            1989            51.97
			
98.51-98.52      1989            59.96 (Code Deleted)
98.59            1989            59.96 (Code Deleted)
			
99.15            1986            99.29
99.71-99.79 3/   1988            99.07
99.85            1987            93.35
99.86            1987            93.39
99.88            1988            99.83
			
1/ Before October 1986 contents of current code 36.05 would have
   been assigned to 36.0.			
			
2/ Codes 78.90-78.99 were retitled as "Insertion of bone growth
   stimulator" in October 1987; the previous contents of codes
   78.90-78.99 were reassigned to codes 78.40-78.49.	
			
3/ Codes 99.71-99.79 were deleted in October 1987; their contents
   were not transferred elsewhere. In the October 1988 revision,
   codes 99.71-99.79 were reclassified as "Therapeutic apheresis."

APPENDIX C

Civilian Population* by Sex, Age, Geographic Region and Race
United States, July 1, 1994

        [Population estimates consistent with Series P-25,
      Current Population Reports, U.S. Bureau of the Census]


Age, geographic	  Both sexes    Male     Female
region and race
	              Population in thousands
			
All ages	  258,932     125,836    133,096
			
   Northeast	   51,319      24,697     26,622
   Midwest	   61,290      29,777     31,513
   South	   89,918      43,391     46,527
   West	56,405	   27,970      28,435
			
   White	  215,375     105,157    110,217
   Black	   32,405      15,274     17,131
   All other	   11,152       5,404      5,747
			
Under 15 years	   57,338      29,354     27,985
			
   Under 1 year	    3,870       1,981      1,889
   1-4 years	   15,857       8,114      7,743
   5-14 years	   37,611      19,260     18,352
			
   Northeast	   10,593       5,425      5,168
   Midwest	   13,513       6,921      6,592
   South	   19,830      10,142      9,689
   West	           13,402       6,866      6,536
			
   White  	   45,510      23,351     22,159
   Black	    8,921       4,523      4,398
   All other	    2,908       1,480      1,428
			
15-44 years	  117,585      58,467     59,118
			
   15-24 years	   35,397      17,872     17,525
   25-34 years	   40,811      20,199     20,612
   35-44 years	   41,377      20,396     20,981
			
   Northeast	   23,066      11,430     11,635
   Midwest	   27,634      13,757     13,877
   South	   40,671      19,998     20,673
   West	           26,214      13,281     12,933
			
   White	   96,334      48,325     48,009
   Black	   15,634       7,412      8,223
   All other	    5,616       2,730      2,886
			
45-64 years			

   45-54 years     50,850      24,540     26,311	
   55-64 years     29,834      14,557     15,277
	           21,016       9,982     11,034
   Northeast			
   Midwest	   10,422       4,977      5,446
   South	   12,035       5,833      6,202
   West	           17,887       8,570      9,317
	           10,506       5,160      5,346

   White           43,780      21,352     22,428           		
   Black            5,170       2,303      2,867
   All other        1,901         885      1,015
	            
65 years & over    33,158      13,475     19,683
			
   65-74 years     18,712       8,290     10,422
   75-84 years     10,925       4,206      6,719
   85 years and over 3,522        980      2,542
			
   Northeast        7,238       2,865      4,373
   Midwest          8,107       3,266      4,841
   South           11,530       4,681      6,849
   West	            6,283       2,663      3,620
			
   White           29,751      12,130     17,621
   Black            2,680       1,036      1,644
   All other          727         309        419


*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 1994 rates using the civilian resident 
population.



Civilian Population of the United States, July 1, 1994.  Estimates by Age, Sex, 
and Region Data are consistent with the estimates announced in Census Advisory 
CB94-43.  Methodology is described in Current Population Report Series P25-1106.  
Release date 3/15/94

_________________________________________________________________________________________
       United States               Northeast                  Midwest                 South                    West
Age  Total    Male   Female    Total  Male    Female   Total   Male    Female   Total   Male   Female   Total   Male   Female
_______________________________________________________________________________________________________________________________
                                    Civilian Population in Thousands                                                                                        
All  258,932 125,836 133,096  51,319  24,697  26,622   61,290  29,777  31,513   89,918  43,391  46,527  56,405  27,970  28,435                                                                                              

0-14  57,338  29,354  27,985  10,593   5,425   5,168   13,513   6,921   6,592   19,830  10,142   9,689  13,402   6,866   6,536
0-4   19,727  10,094   9,633   3,681   1,885   1,796    4,444   2,274   2,170    6,786   3,471   3,316   4,816   2,465   2,351
5-9   18,859   9,657   9,201   3,533   1,812   1,722    4,471   2,291   2,180    6,494   3,320   3,174   4,360   2,234   2,126
10-14 18,753   9,602   9,150   3,379   1,729   1,650    4,598   2,356   2,242    6,550   3,351   3,199   4,226   2,167   2,059                                                                                              

15-44 117,585 58,467  59,118  23,066  11,430  11,635   27,634  13,757  13,877   40,671  19,998  20,673  26,214  13,281  12,933
15-19  17,517  8,951   8,566   3,189   1,624   1,565    4,294   2,194   2,101    6,216   3,162   3,054   3,817   1,972   1,846
20-24  17,880  8,921   8,959   3,433   1,712   1,722    4,235   2,112   2,123    6,340   3,109   3,232   3,871   1,989   1,882
25-29  18,881  9,360   9,521   3,800   1,882   1,918    4,281   2,116   2,165    6,480   3,167   3,314   4,319   2,195   2,124
30-34  21,930 10,838  11,091   4,394   2,169   2,225    5,048   2,495   2,553    7,504   3,665   3,839   4,984   2,509   2,475
35-39  21,771 10,750  11,020   4,355   2,146   2,208    5,135   2,549   2,586    7,415   3,616   3,799   4,865   2,439   2,427
40-44  19,606  9,645   9,961   3,895   1,897   1,997    4,640   2,291   2,349    6,715   3,280   3,435   4,357   2,177   2,180
                                                                                              

45-64  50,850 24,540  26,311  10,422   4,977   5,446   12,035   5,833   6,202   17,887   8,570   9,317  10,506   5,160   5,346
45-49  16,649  8,152   8,496   3,374   1,630   1,744    3,875   1,901   1,975    5,795   2,827   2,968   3,605   1,795   1,810
50-54  13,186  6,405   6,781   2,701   1,297   1,405    3,114   1,515   1,599    4,625   2,233   2,392   2,745   1,360   1,386
55-59  10,935  5,243   5,692   2,233   1,062   1,171    2,625   1,264   1,361    3,879   1,843   2,036   2,197   1,074   1,123
60-64  10,082  4,739   5,342   2,114     988   1,126    2,421   1,153   1,268    3,588   1,667   1,921   1,959     932   1,027                                                                                              

65+    33,158 13,475  19,683   7,238   2,865   4,373    8,107   3,266   4,841   11,530   4,681   6,849   6,283   2,663   3,620
65-69   9,970  4,500   5,471   2,150     958   1,191    2,383   1,088   1,296    3,531   1,583   1,948   1,907     871   1,035
70-74   8,741  3,790   4,951   1,887     801   1,087    2,073     897   1,176    3,083   1,331   1,752   1,698     761     937
75-79   6,574  2,655   3,919   1,456     569     886    1,625     647     977    2,248     907   1,342   1,245     532     713
80-84   4,351  1,550   2,801     955     328     627    1,092     382     709    1,500     532     969     804     308     496
85+     3,522    980   2,542     790     209     582      935     251     683    1,167     329     838     629     191     439

Civilian Population of the United States, July 1, 1994.  
Estimates by Age, Sex, and Race 
(Consistent with the 1990 Census, as enumerated.)
 
_______________________________________________________________________________________________________________

                 All races                  White                       Black                   Other races
    Age   Total   Male    Female    Total    Male    Female      Total   Male   Female    Total   Male   Female
________________________________________________________________________________________________________________
                                       Civilian population in thousands

  Total 258,932  125,836  133,096  215,375  105,157  110,217    32,405   15,274   17,131   11,152  5,404  5,747                                                             

    0-4 19,727    10,094    9,633   15,592    7,995    7,597     3,119    1,581    1,538    1,017    519    498
    0    3,870     1,981    1,889    3,041    1,560    1,481       619      314      305      210    107    103
    1    3,878     1,985    1,893    3,060    1,569    1,491       616      313      303      202    103     99
    2    3,956     2,023    1,933    3,132    1,604    1,528       619      314      305      205    105    100
    3    3,990     2,041    1,949    3,163    1,622    1,541       623      315      308      204    104    100
    4    4,032     2,064    1,968    3,195    1,640    1,556       642      325      317      195    100     95                                                             

    5-9 18,859     9,657    9,201   14,997    7,695    7,302     2,939    1,491    1,448      923    471    452
    5    3,884     1,989    1,894    3,063    1,572    1,491       630      319      311      190     98     93
    6    3,792     1,940    1,852    3,011    1,544    1,468       595      302      293      186     95     91
    7    3,747     1,917    1,830    2,985    1,531    1,454       582      294      287      180     92     88
    8    3,595     1,841    1,754    2,874    1,475    1,399       544      276      268      177     90     87
    9    3,841     1,969    1,872    3,063    1,574    1,490       588      299      289      189     96     93                                                             

  10-14 18,753     9,602    9,150   14,921    7,661    7,260     2,864    1,452    1,412      968    490    478
    10   3,744     1,920    1,824    2,984    1,535    1,450       567      288      279      192     98     95
    11   3,770     1,931    1,840    3,010    1,545    1,465       566      287      279      194     99     96
    12   3,768     1,927    1,841    2,994    1,535    1,459       580      294      286      195     98     97
    13   3,722     1,903    1,818    2,962    1,519    1,443       562      285      278      197     99     98
    14   3,748     1,921    1,828    2,971    1,526    1,444       588      298      289      190     96     94                                                             

  15-19 17,517     8,951    8,566   13,955    7,152    6,803     2,717    1,372    1,345      845    428    417
    15   3,602     1,848    1,754    2,849    1,466    1,383       572      291      281      181     92     89
    16   3,515     1,808    1,707    2,802    1,444    1,357       544      277      267      169     86     83
    17   3,561     1,834    1,726    2,836    1,465    1,371       555      283      272      170     87     83
    18   3,324     1,692    1,631    2,657    1,357    1,300       510      256      254      157     79     78
    19   3,515     1,769    1,746    2,811    1,420    1,392       536      265      271      168     84     84                                                             

  20-24 17,880     8,921    8,959   14,369    7,212    7,157     2,587    1,248    1,339      924    461    463
    20   3,389     1,697    1,692    2,708    1,362    1,346       513      252      262      168     84     84
    21   3,397     1,698    1,699    2,703    1,357    1,345       516      252      264      178     89     89
    22   3,509     1,751    1,759    2,815    1,413    1,402       510      246      264      184     92     92
    23   3,750     1,865    1,885    3,024    1,514    1,510       531      253      278      195     98     97
    24   3,834     1,910    1,924    3,118    1,566    1,553       517      245      272      199     99    100                                                             

  25-29 18,881     9,360    9,521   15,368    7,693    7,675     2,558    1,201    1,357      956    466    489
    25   3,689     1,837    1,853    3,009    1,511    1,498       488      230      257      192     95     97
    26   3,619     1,792    1,826    2,937    1,469    1,468       495      232      262      187     91     95
    27   3,721     1,844    1,877    3,032    1,518    1,514       501      235      266      187     91     96
    28   3,618     1,788    1,830    2,948    1,471    1,477       491      230      261      179     87     92
    29   4,234     2,099    2,136    3,442    1,724    1,718       582      273      310      210    102    108                                                             

  30-34 21,930    10,838   11,091   18,104    9,047    9,056     2,786    1,288    1,497    1,040    503    537
    30   4,301     2,126    2,175    3,532    1,765    1,767       562      261      301      207    100    106
    31   4,281     2,115    2,166    3,524    1,759    1,765       547      254      293      210    101    109
    32   4,382     2,165    2,217    3,625    1,811    1,814       553      255      297      204     99    105
    33   4,385     2,158    2,227    3,640    1,813    1,827       540      247      293      205     98    107
    34   4,581     2,275    2,306    3,782    1,900    1,882       585      271      313      214    104    111

  35-39 21,771    10,750   11,020   18,093    9,035    9,059     2,695    1,247    1,448      983    469    514
    35   4,480     2,215    2,265    3,711    1,855    1,856       562      261      302      207    100    107
    36   4,397     2,170    2,227    3,664    1,828    1,836       537      248      289      196     94    102
    37   4,432     2,188    2,244    3,683    1,838    1,845       552      255      297      197     94    103
    38   4,019     1,975    2,044    3,348    1,665    1,683       489      225      264      182     85     96
    39   4,442     2,202    2,240    3,687    1,848    1,839       554      258      296      200     95    105                                                             

  40-44 19,606     9,645    9,961   16,445    8,186    8,259     2,292    1,056    1,237      869    404    465
    40   4,197     2,067    2,130    3,508    1,747    1,761       502      232      270      187     88     99
    41   3,991     1,960    2,031    3,349    1,664    1,685       460      210      249      182     85     97
    42   3,904     1,920    1,984    3,289    1,637    1,652       449      206      243      167     78     89
    43   3,702     1,812    1,890    3,091    1,533    1,559       436      199      236      175     81     94
    44   3,813     1,887    1,926    3,208    1,605    1,602       446      208      238      159     73     86                                                             

  45-49 16,649     8,152    8,496   14,222    7,039    7,183     1,737      791      946      690    322    367
    45   3,650     1,793    1,857    3,088    1,534    1,554       406      187      219      156     72     84
    46   3,542     1,736    1,806    3,030    1,502    1,528       368      167      200      145     67     78
    47   3,836     1,880    1,956    3,316    1,642    1,674       374      170      204      146     68     78
    48   2,648     1,289    1,360    2,266    1,114    1,151       266      119      147      116     55     62
    49   2,972     1,455    1,517    2,523    1,247    1,275       322      147      175      127     60     66                                                             

  50-54 13,186     6,405    6,781   11,350    5,568    5,782     1,339      602      738      497    236    261
    50   2,888     1,407    1,481    2,482    1,221    1,261       293      132      161      113     54     59
    51   2,930     1,428    1,501    2,548    1,253    1,294       278      126      152      104     49     55
    52   2,548     1,237    1,312    2,190    1,074    1,116       263      118      145       95     45     50
    53   2,440     1,182    1,258    2,098    1,026    1,072       250      111      138       92     44     48
    54   2,380     1,151    1,229    2,032      993    1,039       256      114      141       92     44     49                                                             

  55-59 10,935     5,243    5,692    9,435    4,573    4,863     1,110      487      623      389    183    206
    55   2,283     1,098    1,184    1,950      947    1,003       246      110      136       87     41     45
    56   2,280     1,095    1,185    1,966      955    1,011       234      102      133       80     38     42
    57   2,178     1,043    1,134    1,876      908      968       224       98      126       78     37     41
    58   2,021       966    1,055    1,758      849      909       195       85      110       69     32     37
    59   2,173     1,041    1,132    1,886      914      972       212       92      119       75     35     40                                                             

  60-64 10,082     4,739    5,342    8,772    4,172    4,601       984      424      560      325    144    181
    60   1,981       934    1,046    1,714      817      897       198       86      111       69     31     38
    61   1,953       923    1,030    1,693      810      883       194       84      110       66     29     36
    62   1,965       921    1,044    1,705      809      896       196       84      112       64     28     36
    63   2,065       971    1,094    1,810      861      949       192       82      110       63     28     35
    64   2,118       990    1,128    1,850      875      975       204       88      116       65     28     37                                                             

  65-69  9,970     4,500    5,471    8,792    3,998    4,794      906       386      520      273    116    157
    65   2,059       948    1,111    1,796      836      960      202        86      116       61     26     35
    66   2,071       948    1,124    1,822      839      983      193        85      108       56     24     33
    67   2,003       905    1,098    1,765      805      960      184        77      107       54     23     31
    68   1,897       845    1,052    1,678      752      926      168        71       96       52     22     30
    69   1,940       854    1,086    1,730      766      965      159        67       92       51     21     29                                                             

  70-74  8,741     3,790    4,951    7,840    3,420    4,419      694       279      415      208     91    117
    70   1,875       824    1,051    1,674      742      932      153        61       92       48     21     27
    71   1,801       786    1,015    1,611      706      904      146        59       86       45     20     25
    72   1,811       791    1,020    1,630      716      913      138        56       83       43     19     24
    73   1,695       729      966    1,527      661      866      130        52       79       38     16     21
    74   1,559       659      899    1,398      594      804      127        51       76       34     14     20

  75-79  6,574     2,655    3,919    5,949    2,414    3,534      499       188      311      126     53     73
    75   1,473       614      859    1,326      555      771      117        47       70       30     12     18
    76   1,369       563      806    1,243      513      730      101        39       62       25     10     15
    77   1,294       524      770    1,173      478      695       96        36       61       25     11     14
    78   1,254       496      758    1,139      453      686       92        33       59       24     10     14
    79   1,184       459      725    1,068      415      653       94        34       60       23     10     13                                                             

  80-84  4,351     1,550    2,801    3,962    1,412    2,550      316       107      210       72     31     41
    80   1,048       393      655      953      359      594       77        26       51       18      8     10
    81     966       352      614      878      321      557       72        24       47       16      7      9
    82     855       306      549      783      279      504       58        20       38       14      6      8
    83     784       268      516      716      244      471       55        18       37       13      5      7
    84     699       232      467      633      209      424       54        18       36       12      5      7                                                             

   85+   3,522       980    2,542    3,209      885    2,324      265        76      188       48     18     30                                                             

   0-14  57,338   29,354   27,985   45,510   23,351   22,159    8,921     4,523    4,398    2,908  1,480  1,428
  15-44 117,585   58,467   59,118   96,334   48,325   48,009   15,634     7,412    8,223    5,616  2,730  2,886
  45-64  50,850   24,540   26,311   43,780   21,352   22,428    5,170     2,303    2,867    1,901    885  1,015                                                             

   15+  201,593   96,482  105,112  169,865   81,807   88,058   23,484    10,750   12,734    8,244  3,924  4,320
   45+   84,008   38,015   45,994   73,531   33,482   40,049    7,850     3,339    4,511    2,628  1,194  1,434
   65+   33,158   13,475   19,683   29,751   12,130   17,621    2,680     1,036    1,644      727    309    419
   75+   14,446    5,185    9,261   13,120    4,712    8,408    1,080       371      709      247    103    144    

APPENDIX D

1.  UNWEIGHTED FREQUENCIES FOR SELECTED VARIABLES: NEWBORN INFANTS

 SURVEY                      Cumulative  Cumulative
 YEAR   Frequency   Percent   Frequency    Percent
 --------------------------------------------------
  94      31412     100.0       31412      100.0

 UNITS                        Cumulative  Cumulative
 FOR AGE Frequency   Percent   Frequency    Percent
 ---------------------------------------------------
     3      31412     100.0       31412      100.0

                            Cumulative  Cumulative
 SEX   Frequency   Percent   Frequency    Percent
 -------------------------------------------------
   1      16136      51.4       16136       51.4
   2      15276      48.6       31412      100.0

                             Cumulative  Cumulative
 RACE   Frequency   Percent   Frequency    Percent
 --------------------------------------------------
    1      15837      50.4       15837       50.4
    2       4442      14.1       20279       64.6
    3        390       1.2       20669       65.8
    4       1038       3.3       21707       69.1
    5       2861       9.1       24568       78.2
    9       6844      21.8       31412      100.0

 MARITAL                       Cumulative  Cumulative
 STATUS   Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
       2      31412     100.0       31412      100.0

                                         Cumulative  Cumulative
 DISCHARGE STATUS   Frequency   Percent   Frequency    Percent
 --------------------------------------------------------------
     1                 30281      96.4       30281       96.4
     2                    17       0.1       30298       96.5
     3                   336       1.1       30634       97.5
     4                    23       0.1       30657       97.6
     5                   280       0.9       30937       98.5
     6                   115       0.4       31052       98.9
     9                   360       1.1       31412      100.0

  CENSUS                        Cumulative  Cumulative
 REGION   Frequency   Percent   Frequency    Percent
 ----------------------------------------------------
      1       7188      22.9        7188       22.9
      2       8529      27.2       15717       50.0
      3       9008      28.7       24725       78.7
      4       6687      21.3       31412      100.0

                                     Cumulative  Cumulative
 NUMBER OF BEDS Frequency   Percent   Frequency    Percent
 ---------------------------------------------------------
 6-99              3093       9.8        3093        9.8
 100-199           6296      20.0        9389       29.9
 200-299           7218      23.0       16607       52.9
 300-499           9517      30.3       26124       83.2
 500 OR MORE       5288      16.8       31412      100.0

 HOSPTIAL                       Cumulative  Cumulative
 OWNERSHIP Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
 1             2668       8.5        2668        8.5
 2             3055       9.7        5723       18.2
 3            25689      81.8       31412      100.0

 PRIMARY EXPECTED                       Cumulative  Cumulative
 SOURCE OF PAYMENT Frequency   Percent   Frequency    Percent
 -------------------------------------------------------------

 MEDICARE               210       0.7         210        0.7
 MEDICAID             10160      32.3       10370       33.0
 OTHER GOVT             662       2.1       11032       35.1
 BLUE CROSS            3719      11.8       14751       47.0
 OTHER PRIV/COMM      12143      38.7       26894       85.6
 SELF PAY              1699       5.4       28593       91.0
 NO CHARGE              128       0.4       28721       91.4
 OTHER                 1909       6.1       30630       97.5
 NOT STATED             782       2.5       31412      100.0

 SECONDARY EXPECTED                     Cumulative  Cumulative
 SOURCE OF PAYMENT Frequency   Percent   Frequency    Percent
 -------------------------------------------------------------

 MEDICAID               174      12.7         174       12.7
 OTHER GOVT              61       4.5         235       17.2
 BLUE CROSS              70       5.1         305       22.3
 OTHER PRIV/COMM        109       8.0         414       30.3
 SELF PAY               675      49.5        1089       79.8
 NO CHARGE                1       0.1        1090       79.9
 OTHER                  275      20.1        1365      100.0

 Frequency Missing = 30047

2. UNWEIGHTED FREQUENCIES FOR SELECTED VARIABLES: NON-NEWBORNS

 SURVEY                      Cumulative  Cumulative
 YEAR   Frequency   Percent   Frequency    Percent
 --------------------------------------------------
  94     245121     100.0      245121      100.0

 UNITS                        Cumulative  Cumulative
 FOR AGE Frequency   Percent   Frequency    Percent
 ---------------------------------------------------
     1     238577      97.4      238803       97.4
     2       4512       1.8      243315       99.3
     3       2032       0.7      245121      100.0

                            Cumulative  Cumulative
 SEX   Frequency   Percent   Frequency    Percent
 -------------------------------------------------
   1      97972      40.0       97972       40.0
   2     147149      60.0      245121      100.0

                             Cumulative  Cumulative
 RACE   Frequency   Percent   Frequency    Percent
 --------------------------------------------------
    1     146159      59.6      146159       59.6
    2      32194      13.1      178353       72.8
    3       1406       0.6      179759       73.3
    4       3897       1.6      183656       74.9
    5      12002       4.9      195658       79.8
    9      49463      20.2      245121      100.0

 MARITAL                        Cumulative  Cumulative
 STATUS    Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
       1      46642      19.0       46642       19.0
       2      39552      16.1       86194       35.2
       3      14987       6.1      101181       41.3 
       4       5140       2.1      106321       43.4
       5       1189       0.5      107510       43.9
       6      22475       9.2      129985       53.0
       9     115136      47.0      245121      100.0

                                         Cumulative  Cumulative
 DISCHARGE STATUS   Frequency   Percent   Frequency    Percent
 --------------------------------------------------------------
        1             199832      81.5      199832       81.5
        2               2230       0.9      202062       82.4
        3               7666       3.1      209728       85.6
        4              15438       6.3      225166       91.9
        5              10595       4.3      235761       96.2
        6               6856       2.8      242617       99.0
        9               2504       1.0      245121      100.0

 CENSUS                        Cumulative  Cumulative
 REGION   Frequency   Percent   Frequency    Percent
 ----------------------------------------------------
      1      65816      26.9       65816       26.9
      2      71296      29.1      137112       55.9
      3      71912      29.3      209024       85.3
      4      36097      14.7      245121      100.0

                                     Cumulative  Cumulative
 NUMBER OF BEDS Frequency   Percent   Frequency    Percent
 ---------------------------------------------------------
 6-99             27813      11.3       27813       11.3
 100-199          45412      18.5       73225       29.9
 200-299          59636      24.3      132861       54.2
 300-499          75723      30.9      208584       85.1
 500 OR MORE      36537      14.9      245121      100.0

 HOSPITAL                       Cumulative  Cumulative
 OWNERSHIP Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
      1       27082      11.0       27082       11.0
      2       23144       9.4       50226       20.5
      3      194895      79.5      245121      100.0

 PRIMARY EXPECTED                       Cumulative  Cumulative
 SOURCE OF PAYMENT Frequency   Percent   Frequency    Percent
 -------------------------------------------------------------

 WORKERS COMP          2402       1.0        2402        1.0
 MEDICARE             85529      34.9       87931       35.9
 MEDICAID             36199      14.8      124130       50.6
 OTHER GOVT            3599       1.5      127729       52.1
 BLUE CROSS           23949       9.8      151678       61.9
 OTHER PRIV/COMM      66742      27.2      218420       89.1
 SELF PAY             11050       4.5      229470       93.6
 OTHER                10216       4.2      239686       97.8
 NO CHARGE             1355       0.6      241041       98.3
 NOT STATED            4080       1.7      245121      100.0

 SECONDARY EXPECTED                     Cumulative  Cumulative
 SOURCE OF PAYMENT Frequency   Percent   Frequency    Percent
 -------------------------------------------------------------

 MEDICARE                28       0.1          28        0.1
 MEDICAID              6328      18.3        6356       18.4
 OTHER GOVT             504       1.5        6860       19.9
 BLUE CROSS            8885      25.6       15745       45.5
 OTHER PRIV/COMM      11010      31.8       26755       77.3
 SELF PAY              4753      13.7       31508       91.0
 OTHER                 3049       8.8       34557       99.8
 NO CHARGE              113       0.3       34670      100.0

 Frequency Missing = 210451

3.  WEIGHTED FREQUENCIES FOR SELECTED VARIABLES: NEWBORN INFANTS

 SURVEY                      Cumulative  Cumulative
 YEAR   Frequency   Percent   Frequency    Percent
 --------------------------------------------------
  94    3749285     100.0     3749285      100.0

 UNITS                        Cumulative  Cumulative
 FOR AGE Frequency   Percent   Frequency    Percent
 ---------------------------------------------------
     3    3749285     100.0     3749285      100.0

                            Cumulative  Cumulative
 SEX   Frequency   Percent   Frequency    Percent
 -------------------------------------------------
   1    1934737      51.6     1934737       51.6
   2    1814548      48.4     3749285      100.0

                             Cumulative  Cumulative
 RACE   Frequency   Percent   Frequency    Percent
 --------------------------------------------------
    1    2069472      55.2     2069472       55.2
    2     467833      12.5     2537305       67.7
    3      39442       1.1     2576747       68.7
    4     101581       2.7     2678328       71.4
    5     201538       5.4     2879866       76.8
    9     869419      23.2     3749285      100.0

 MARITAL                        Cumulative  Cumulative
 STATUS    Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
       2    3749285     100.0     3749285      100.0

                                         Cumulative  Cumulative
 DISCHARGE STATUS   Frequency   Percent   Frequency    Percent
 --------------------------------------------------------------
       1             3593527      95.8     3593527       95.8
       2                2963       0.1     3596490       95.9
       3               45137       1.2     3641627       97.1
       4                2211       0.1     3643838       97.2
       5               35466       0.9     3679304       98.1
       6               10750       0.3     3690054       98.4
       9               59231       1.6     3749285      100.0

 CENSUS                        Cumulative  Cumulative
 REGION   Frequency   Percent   Frequency    Percent
 ----------------------------------------------------
      1     751139      20.0      751139       20.0
      2     816617      21.8     1567756       41.8
      3    1315455      35.1     2883211       76.9
      4     866074      23.1     3749285      100.0

                                    Cumulative  Cumulative
 NUMBER OF BEDS Frequency   Percent   Frequency    Percent
 ---------------------------------------------------------
 6-99            607520      16.2      607520       16.2
 100-199         853002      22.8     1460522       39.0
 200-299         701257      18.7     2161779       57.7
 300-499        1024106      27.3     3185885       85.0
 500 OR MORE     563400      15.0     3749285      100.0

 HOSPITAL                       Cumulative  Cumulative
 OWNERSHIP Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
 1           382142      10.2      382142       10.2
 2           449481      12.0      831623       22.2
 3          2917662      77.8     3749285      100.0

 PRIMARY EXPECTED                       Cumulative  Cumulative
 SOURCE OF PAYMENT Frequency   Percent   Frequency    Percent
 -------------------------------------------------------------
 MEDICARE             21795       0.6       21795        0.6
 MEDICAID           1220490      32.6     1242285       33.2
 OTHER GOVT           78491       2.1     1320776       35.3
 BLUE CROSS          424113      11.3     1744889       46.6
 OTHER PRIV/COMM    1441594      38.4     3186483       85.0
 SELF PAY            220603       5.9     3407086       90.9
 OTHER               206313       5.5     3613399       96.4
 NO CHARGE            16976       0.5     3630375       96.9
 NOT STATED          118910       3.2     3749285      100.0

 SECONDARY EXPECTED                     Cumulative  Cumulative
 SOURCE OF PAYMENT Frequency   Percent   Frequency    Percent
 -------------------------------------------------------------
 MEDICAID             25695      15.3       25695       15.3
 OTHER GOVT           10204       6.1       35899       21.4
 BLUE CROSS           10616       6.3       46515       27.7
 OTHER PRIV/COMM      18684      11.1       65199       38.8
 SELF PAY             86914      51.8      152113       90.6
 OTHER                15662       9.3      167775       99.9
 NO CHARGE               63       0.0      167838      100.0

 Frequency Missing = 3581447

4.  WEIGHTED FREQUENCIES FOR SELECTED VARIABLES: NON-NEWBORNS

 SURVEY                      Cumulative  Cumulative
 YEAR   Frequency   Percent   Frequency    Percent
 --------------------------------------------------
  94   30843087     100.0    30843087      100.0

 UNITS                        Cumulative  Cumulative
 FOR AGE Frequency   Percent   Frequency    Percent
 ---------------------------------------------------
     1   30113059      97.7    30131622       97.7
     2     503222       1.6    30634844       99.3
     3     226806       0.7    30843087      100.0

                            Cumulative  Cumulative
 SEX   Frequency   Percent   Frequency    Percent
 -------------------------------------------------
   1   12293339      39.9    12293339       39.9
   2   18549748      60.1    30843087      100.0

                             Cumulative  Cumulative
 RACE   Frequency   Percent   Frequency    Percent
 --------------------------------------------------
    1   20003156      64.9    20003156       64.9
    2    3711210      12.0    23714366       76.9
    3     169631       0.5    23883997       77.4
    4     396311       1.3    24280308       78.7
    5     785471       2.5    25065779       81.3
    9    5777308      18.7    30843087      100.0

 MARITAL                        Cumulative  Cumulative
 STATUS    Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
       1    9431923      30.6     9431923       30.6
       2    6232866      20.2    15664789       50.8
       3    2954749       9.6    18619538       60.4
       4    1103673       3.6    19723211       63.9
       5     210730       0.7    19933941       64.6
       6    2120640       6.9    22054581       71.5
       9    8788506      28.5    30843087      100.0

                                         Cumulative  Cumulative
 DISCHARGE STATUS   Frequency   Percent   Frequency    Percent
 --------------------------------------------------------------
       1            25009255      81.1    25009255       81.1
       2              270414       0.9    25279669       82.0
       3             1165158       3.8    26444827       85.7
       4             1962191       6.4    28407018       92.1
       5             1111426       3.6    29518444       95.7
       6              825981       2.7    30344425       98.4
       9              498662       1.6    30843087      100.0

 CENSUS                        Cumulative  Cumulative
 REGION   Frequency   Percent   Frequency    Percent
 ----------------------------------------------------
      1    7128436      23.1     7128436       23.1
      2    7133439      23.1    14261875       46.2
      3   11310254      36.7    25572129       82.9
      4    5270958      17.1    30843087      100.0

                                     Cumulative  Cumulative
 NUMBER OF BEDS Frequency   Percent   Frequency    Percent
 ---------------------------------------------------------
 6-99           6274016      20.3     6274016       20.3
 100-199        7542262      24.5    13816278       44.8
 200-299        5948590      19.3    19764868       64.1
 300-499        7263160      23.5    27028028       87.6
 500 OR MORE    3815059      12.4    30843087      100.0

 HOSPITAL                       Cumulative  Cumulative
 OWNERSHIP Frequency   Percent   Frequency    Percent
 -----------------------------------------------------
 1          3337760      10.8     3337760       10.8
 2          3800545      12.3     7138305       23.1
 3         23704782      76.9    30843087      100.0

 PRIMARY EXPECTED                       Cumulative  Cumulative
 SOURCE OF PAYMENT Frequency   Percent   Frequency    Percent
 -------------------------------------------------------------
 WORKERS COMP        298367       1.0      298367        1.0
 MEDICARE          11605030      37.6    11903397       37.6
 MEDICAID           4586940      14.9    16490337       52.5
 OTHER GOVT          518045       1.7    17008382       54.2
 BLUE CROSS         2609542       8.5    19617924       62.7
 OTHER PRIV/COMM    7907005      25.6    27524929       88.3
 SELF PAY           1441633       4.7    28966562       93.0
 OTHER              1129815       3.7    30096377       96.7
 NO CHARGE           143354       0.5    30239731       97.2
 NOT STATED          603356       2.0    30843087      100.0

 SECONDARY EXPECTED                 Cumulative  Cumulative
 SOURCE OF PAYMENT Frequency   Percent   Frequency    Percent
 -------------------------------------------------------------
 MEDICARE              4594       0.1        4594        0.1
 MEDICAID           1321185      21.7     1325779       21.8
 OTHER GOVT          122004       2.0     1447783       23.8
 BLUE CROSS         1502279      24.7     2950062       48.5
 OTHER PRIV/COMM    2334826      38.4     5284888       86.9
 SELF PAY            516628       8.5     5801516       95.4
 OTHER               271181       4.5     6072697       99.9
 NO CHARGE            14372       0.2     6087069      100.0

 Frequency Missing = 24756018

---

This page last reviewed: Wednesday, August 29, 2007

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