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Scientific Data Documentation
National Hospital Discharge Survey, 1997
DSN: CC36.NHDS97Abstract
This material provides documentation for users of the 1997 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 II provides technical details of the tape.
Section III provides a detailed description of the contents of each data record.
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 errorsAppendix 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 variables.
Table Of ContentsSection I. Description of the National Hospital Discharge Survey 3
Section II. Technical Description of Tape 15
Section III. Record Layout: Location and Coding of Data Elements 16
Appendix A: Definitions of Certain Terms Used in This Document 19
Appendix B: ICD-9-CM Addenda 22
Appendix C: Population Estimates 50
Appendix D: Unweighted & Weighted Frequencies of Selected NHDS Variables 57
I. Description of The National Hospital Discharge SurveyIntroduction.
This document and its appendices contain information for users of the 1997 National Hospital Discharge
Survey (NHDS) public use data file. Conducted annually by the National Center for Health Statistics, NHDS
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 in the United States. 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 in 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 1997
the sample consisted of 513 hospitals. Of the 513 hospitals, 12 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 501
inscope (eligible) hospitals, 474 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 60 percent of the responding hospitals. The second was an
automated method, used for approximately 40 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 1997, about 33 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).NHDS usually presents diagnoses and procedures in the order they are listed on the abstract form or obtained
from abstract services; however, there are exceptions. For women discharged after a delivery, a code of V27
from the supplemental classification is entered as the first-listed code, with a code designating either normal or
abnormal delivery in the second-listed position. In another exception, a decision was made to reorder some
acute myocardial infarction diagnoses. If an acute myocardial infarction is listed with other circulatory
diagnoses and is other than the first entry, it is reordered to first position. If a symptom appears as a first-listed
code and a diagnosis appears as a secondary code, the diagnosis replaces the symptom which is moved back.
Figure 1. Medical abstract for the 1997 National Hospital Discharge SurveyFollowing 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.A new edit program was developed for the NHDS and was implemented beginning in the 1996 data year. The
updated edit program, while following the same general specifications as the previous edit program, was
designed to make as few changes as possible in the data. Thus, there may be some minor anomalies in certain
areas which would be apparent when examining data over time, performing trend analyses, or examining
combinations of variables. Particular features of the new edit program which may affect certain variables are:
- An improved imputation procedure for missing age and sex data was developed, which maintains the known distribution of these variables, according to categories of the First-Listed Diagnosis.
- There is no longer a re-ordering of the procedure codes.
- Principal and additional expected sources of payment are no longer re-ordered, with one exception: "Self-Pay" is listed as the principal source only if there are no other sources, or the only other source is "Not Stated"; otherwise it must be listed after every other source (except "Not Stated").
- An arbitrary month of admission is no longer assigned to records received from abstract services which do not provide the exact date of admission and discharge.
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 1996 are listed in Appendix B. All coding of the 1997
data is consistent with the ICD-9-CM and the addendum effective October 1, 1996. Information provided by
automated systems for the last three months of 1997 which was coded using the October 1997 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 estimates of the civilian population of the United Stated as of July 1, 1997, which have
been provided by the U.S. Bureau of the Census. Figures are consistent with national population estimates in
PPL-91R (U.S. Population Estimates by Age, Sex, Race and Hispanic Origin: 1990-1997) and have been
adjusted for net underenumeration using the 1990 National Population Adjustment Matrix.*Note that prior to the 1997 data year, Census estimates of the civilian population provided with the NHDS
public use data tape documentation were not adjusted for the undercount.
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 value according to the specifications described earlier.
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 25 percent of the discharges, and no attempt was
made to impute for these missing values.During 1997, 16.5 percent of the records lacked the date of admission, but included a length of stay. Because
the new edit program does not require exact admission or discharge dates if length of stay is provided on the
record, no attempt was made to impute for these missing values.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
Parameters for calculating 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 estimates
and their variances were produced. A regression model was then used to produce best-fit curves, based on
the empirically determined relationship between the size of an estimate X and its relative variance. The relative
standard error of an estimate X [RSE(X)] is the square root of the relative variance and may be calculated
from the formula:RSE(X) = 100 * SQRT {a + b/X}
with a and b provided in Table 1. When multiplied by 100, the RSE(X) is expressed as a percent of X.
For example, in 1997 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 384,000. Using the
applicable constants from Table 1 for estimates by sex produces:RSE(384,000) = .046
When multiplied by 100, the relative standard error for the estimate of interest becomes 4.6 percent. The
standard error of the estimate is obtained by multiplying the relative standard error by the estimate itself:
SE(384,000) = 384,000 * .046 = 17,664
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:
(384,000 - 2*17,664) <-> (384,000 + 2*17,664)
348,700 <-> 419,300
Relative Standard Error for Estimates of PercentsApproximate 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) may be calculated using the formula:
where 100p is the percent of interest, X is the base of the percent, and b is the parameter b in the formula for
approximating the RSE(X). The values for b are given in Table 1. When multiplied by 100, the RSE(p) is
expressed as a percent of the estimate, p.
For example, in 1997 the estimated number of discharges from short-stay hospitals which were female was
18,647,000. This is 60.3 percent of the estimated 30,914,000 discharges for that year. Using the applicable
constants from Table 1 for estimates by sex produces:RSE(.603) = .002635
When multiplied by 100, the relative standard error for the estimate of interest becomes .2635 percent.
From this the standard error is obtained by multiplying the relative standard error by the estimate itself:
SE(.603) = .603* 0.002635 = .0016
The standard error can be employed to generate confidence intervals for statistical testing. In this example,
the 95% confidence interval for the estimate of the percentage of female inpatients is:
(.603 - 2*.0016) <-> (.603 + 2*.0016)
.5998 <-> .6062
or, equivalently
59.98% <-> 60.62%
Table 1.Parameter values for relative standard errors for National Hospital Discharge Survey aggregate statistics by
statistic type: United States, 1997
FIRST-LISTED DIAGNOSIS DAYS OF CARE ALL-LISTED DIAGNOSES ALL-LISTED PROCEDURES Characteristic a b a b a b a b TOTAL 0.00132 313.983 0.00242 1,036.029 0.00271 428.987 0.00288 323.247 SEX Male 0.00148 335.128 0.00299 1,309.507 0.00214 307.917 0.00268 380.213 Female 0.00127 325.984 0.00252 1,060.275 0.00127 311.394 0.00197 299.725 AGE GROUP Under 15 years 0.01470 181.262 0.02393 346.675 0.01617 223.921 0.02639 196.719 15-44 years 0.00137 294.357 0.00285 934.043 0.00151 309.115 0.00219 305.574 45-64 years 0.00138 301.320 0.00284 1,248.476 0.00290 370.245 0.00235 298.267 65 years and over 0.00147 343.779 0.00275 1,866.761 0.00144 361.717 0.00239 292.252 REGION Northeast 0.00384 195.564 0.00863 495.447 0.00592 239.709 0.00695 219.126 Midwest 0.00609 191.492 0.00866 481.071 0.00853 180.424 0.00870 163.190 South 0.00369 320.084 0.00572 1,581.301 0.00307 341.005 0.00498 274.548 West 0.00513 338.516 0.01008 926.285 0.00508 378.827 0.00663 288.835 RACE White 0.00300 314.704 0.00480 1,103.096 0.00357 314.530 0.00463 369.830 Black 0.00529 248.048 0.00822 875.877 0.00519 236.801 0.00662 225.180 All other 0.01770 200.033 0.02524 581.314 0.01615 224.604 0.02070 211.065 Race not stated 0.01973 196.517 0.02387 394.423 0.02002 187.166 0.02126 142.769 ESOP Worker's Comp 0.00721 320.711 0.01413 896.903 0.01093 337.073 0.01143 270.432 Medicare 0.00171 325.698 0.00301 1,822.158 0.00157 372.529 0.00264 297.577 Medicaid 0.00438 293.366 0.00709 685.261 0.00379 287.541 0.00540 282.342 Payment not stated 0.00962 313.407 0.01966 1,484.182 0.01219 310.942 0.01814 248.591 Other Govt Pymts 0.00181 278.864 0.00345 617.794 0.00199 299.815 0.00265 289.092 Private insurance 0.00373 265.383 0.00994 854.606 0.00415 281.681 0.00689 227.293 Self pay 0.02771 94.095 0.03240 244.803 0.03212 127.947 0.03297 94.813 NC/Other 0.01828 394.867 0.02548 1,488.967 0.01931 386.315 0.02059 388.354
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 1997 NHDS, 87 percent of the 474 responding hospitals provided data
for all twelve months, and 97 percent provided at least 9 months of data.How to Use the Data Tape.
The NHDS records are weighted to allow inflation to national or regional estimates. The weight applied to
each record is found in tape location 21-25. To produce an estimate of the number of discharges, the weights
for the desired records must be summed. To produce an estimate for number of days of care, the weight must
be multiplied by the days of care (tape location 13-16) and these products are summed. Average length of
stay data can be obtained by dividing the days of care by the number of discharges as calculated above.Appendix D contains unweighted and weighted frequencies for selected variables on the data tape. These may
be used as a cross-check when processing the data on the user's system.Diagnosis-Related Groups (DRGs).
Many users of the NHDS data tapes have expressed an interest in converting the data to DRGs. This has been
done using DRG Grouper Programs obtained from the Health Care Financing Administration. The DRGs and
the DRG Grouper Programs were developed outside of the National Center for Health Statistics; any
questions about DRGs, other than specific questions about how they relate to NHDS data, should be
addressed elsewhere.Questions.
Questions concerning data on the tape should be directed to Maria Owings, Ph.D., Hospital Care Statistics
Branch, Division of Health Care Statistics, National Center for Health Statistics, Presidential Building, Room
956, 6525 Belcrest Road, Hyattsville, Maryland 20782, (301)-436-7125.
References
- 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.
- SMG Hospital Marketing Group, Inc. 1989. Hospital Market Database. Healthcare Information Specialists, 1342 North LaSalle Drive, Chicago, Illinois.
- 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.
- 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.
- 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. 1997.
II. Technical Description Of TapeData Set Name------------------------------------------------------BG00.NHDS97.PU
Number of REELS or CARTRIDGES--------------------------------------------------1
Number of Recording Tracks, REEL----------------------------------------------------9
Number of Recording Tracks, CARTRIDGE------------------------------------------18
Density for REEL (bpi)-------------------------------------------------------------6,250
Density for CARTRIDGE (bpi)---------------------------------------------------38,000
Language-----------------------------------------------------------------------EBCDIC
Parity--------------------------------------------------------------------------------Odd
Record Length-------------------------------------------------------------------------81
Block Size------------------------------------------------------------------------16,200
Number of Records-------------------------------------------------------------300,464
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 on 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 Location Positions Item Description and Codes 1 1-2 2 Survey Year: 97 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 9 = Not Stated 8 10-11 2 Month of Admission: 01-12: January to December 99: Missing ------------------------------------------------------------------------------------- * Ages 100 and over were recoded to 99. Item Tape 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 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/Comm'l 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 14.0 -------------------------------------------------------------------------- * Codes are in compliance with the International Classification of Diseases, 9th Revision, Clinical Modification, ICD-9-CM).For diagnosis codes, there is an implied decimal between positions 3 and 4. For E-codes, the implied decimal is between the
4th and 5th position. For inapplicable 4th or 5th digits, a dash is inserted.For procedure codes, there is an implied decimal between positions 2 and 3. For inapplicable 3rd or 4th digits, a dash is
inserted.
Appendix A - Definition Of TermsTerms 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 proceduresDischarge 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 termsAge: 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:
U.S. CENSUS REGIONS
NORTHEAST MIDWEST SOUTH WEST Maine Michigan Delaware Montana New Hampshire Ohio Maryland Idaho Vermont Illinois District of Columbia Wyoming Massachusetts Indiana Virginia Colorado Connecticut Wisconsin West Virginia New Mexico Rhode Island Minnesota North Carolina Arizona New York Iowa South Carolina Utah New Jersey Missouri Georgia Nevada Pennsylvania North Dakota Florida Washington South Dakota Kentucky Oregon Nebraska Tennessee California Kansas Alabama Hawaii Mississippi Alaska Arkansas Louisana Oklahoma Texas
Appendix BThe 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 1997.As described earlier in this document, the 1997 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 1996. Data collected via abstract service were coded using two
different ICD-9-CM revisions. For the first 9 months of 1997, the ICD-9-CM including the addendum of
October 1, 1986-96 was used; for the last 3 months the October 1997 addendum was used. Therefore, data
provided by automated systems for the last three months of 1997 was converted back to the code assignment
under the October 1996 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 Effective Current code(s) assignment October 1 Previous code(s) assignment 005.81 1995 005.8 005.89 1995 005.8 008.00-008.09 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 041.1 041.81-041.85 1992 041.8 041.86 1995 041.84 041.89 1992 041.8 042 1994 042.0-042.2, 042.9, 043.0-043.3, 043.9, 044.0, 044.9 (Codes delted) 042.0-042.9 1986 279.19 043.0-043.9 1986 279.19 044.0-044.9 1986 279.19 070.20-070.21 1991 070.2 070.22 1994 070.20 070.23 1994 070.21 070.30-070.31 1991 070.3 070.32 1994 070.30 070.33 1994 070.31 070.41-070.43 1991 070.4 070.44 1994 070.41 070.49 1991 070.4 070.51-070.53 1991 070.5 070.54 1994 070.51 070.59 1991 070.5 077.98-077.99 1993 077.9 078.10-078.11,078.19 1993 078.1 078.88 1993 078.89 079.4 1993 079.8 079.50-079.53,079.59 1993 079.8 079.6 1996 079.89 079.81 1995 079.89 079.88-079.89 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 250.91 278.00-278.01 1995 278.0 283.10-283.11,283.19 1993 283.1 291.81 1996 291.8 291.89 1996 291.8 293.84 1996 293.89 300.82 1996 300.81 305.1 1994 305.10, 305.11, 305.12, 305.13 (Codes deleted) 312.81-312.82,312.89 1994 312.8 315.32 1996 315.39 320.81-320.89 1992 320.8 333.92-333.93 1994 333.99 337.20-337.22,337.29 1993 337.9 342.00-342.02 1994 342.0 342.10-342.12 1994 342.1 342.80-342.82 1994 342.9 342.90-342.92 1994 342.9 344.00-344.04,344.09 1994 344.0 344.30-344.32 1994 344.3 344.40-344.42 1994 344.4 344.81,344.89 1993 344.8 345.00-345.01 1989 345.0 345.10-345.11 1989 345.1 345.40-345.41 1989 345.4 345.50-345.51 1989 345.5 345.60-345.61 1989 345.6 345.70-345.71 1989 345.7 345.80-345.81 1989 345.8 345.90-345.91 1989 345.9 346.00-346.01 1992 346.0 346.10-346.11 1992 346.1 346.20-346.21 1992 346.2 346.80-346.81 1992 346.8 346.90-346.91 1992 346.9 355.71 1993 354.4 355.79 1993 355.7 371.82 1992 371.89 374.87 1990 374.89 403.00-403.01 1989 403.0 403.10-403.11 1989 403.1 403.90-403.91 1989 403.9 404.00-404.03 1989 404.0 404.10-404.13 1989 404.1 404.90-404.93 1989 404.9 410.00-410.02 1989 410.0 410.10-410.12 1989 410.1 410.20-410.22 1989 410.2 410.30-410.32 1989 410.3 410.40-410.42 1989 410.4 410.50-410.52 1989 410.5 410.60-410.62 1989 410.6 410.70-410.72 1989 410.7 410.80-410.82 1989 410.8 410.90-410.92 1989 410.9 411.81 1989 410.9 411.89 1989 411.8 414.00-414.01 1994 414.0 414.02-414.03 1994 996.03 414.04-414.05 1996 414.00 415.11 1995 997.3 & 415.1 415.19 1995 415.1 429.71 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 434.9 435.3 1995 435.0 & 435.1 437.7 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 440.2 440.30-440.32 1994 996.1 441.00-441.03 1994 441.0 441.6 1993 441.1 & 441.3 441.7 1993 441.2 & 441.4 446.20-446.21,446.29 1990 446.2 451.82-451.84 1993 451.89 458.2 1995 997.9 & 458.9 466.11 1996 466.1 466.19 1996 466.1 482.30-482.39 1992 482.3 482.81-482.89 1992 482.8 483.0 1992 483 483.1 1996 078.88 & 484.8 483.8 1992 483 491.20-491.21 1991 491.2 493.20 1989 493.90 493.21 1989 493.91 512.1 1994 997.3 518.81 1987 799.1 518.82-518.89 1987 518.8 524.00-524.09 1992 524.0 524.10-524.19 1992 524.1 524.60-524.69 1991 524.6 524.70-524.79 1992 524.8 530.10-530.11, 530.19 1993 530.1 530.81 1993 530.1 530.82-530.84, 530.89 1993 530.8 535.00-535.01 1991 535.0 535.10-535.11 1991 535.1 535.20-535.21 1991 535.2 535.30-535.31 1991 535.3 535.40-535.41 1991 535.4 535.50-535.51 1991 535.5 535.60-535.61 1991 535.6 536.3 1994 536.8 537.82 1990 537.89 537.83 1991 537.82 556.0-556.6 1994 556 556.8-556.9 1994 556 562.02 1991 562.00 562.03 1991 562.01 562.12 1991 562.10 562.13 1991 562.11 569.60-569.61 1995 569.6 569.69 1995 569.6 569.84 1990 557.1 569.85 1991 569.84 574.60 1996 574.00 & 574.30 574.61 1996 574.01 & 574.31 574.70 1996 574.10 & 574.40 574.71 1996 574.11 & 574.41 574.80 1996 574.00 & 574.10 574.30 & 574.40 574.81 1996 574.01 & 574.11 574.31 & 574.41 574.90 1996 574.20 & 574.50 574.91 1996 574.21 & 574.51 575.10-575.11 1996 575.1 575.12 1996 575.0 & 575.1 593.70-593.73 1994 593.7 596.51-596.53 1992 596.5 596.54 1992 344.61 596.55-596.59 1992 596.5 599.81-599.89 1992 599.8 645.0 1991 645 651.30-651.31,651.33 1989 651.00-651.01,651.03 651.40-651.41,651.43 1989 651.10-651.11,651.13 651.50-651.51,651.53 1989 651.20-651.21,651.23 651.60-651.61,651.63 1989 651.80-651.81,651.83 654.20-654.21,654.23 1990 654.2, 654.9 654.90-651.94 1990 654.2, 654.9 657.0 1991 657 659.60,659.61,659.63 1992 659.80-659.81, 659.83 665.10,665.11 1992 665.10,665.11,665.12,665.14 Note: The title for the subcategory, 665.1 has been changed, making the fifth-digit subclassification, 665.12 and 665.14 invalid. 670.0 1991 670 672.0 1991 672 677 1994 * No previous code assignment. 690.10 1995 690 690.11 1995 691.8 & 704.8 690.12 1995 691.8 690.18 1995 690 690.8 1995 690 692.72-692.74 1992 692.79 692.82-692.83 1992 692.89 702.0-702.8 1991 702 702.11,702.19 1994 702.1 704.02 1993 704.09 709.00-709.01,709.09 1994 709.0 710.5 1992 288.3,729.1 728.86 1995 729.4 733.10-733.16, 733.19 1993 733.1 738.10-738.19 1992 738.1 747.60-747.64, 747.69 1993 747.6 747.82 1993 747.89 752.51-752.52 1996 752.5 752.61-752.63 1996 752.6 752.64-752.65 1996 752.8 752.69 1996 752.8 753.10-753.17,753.19 1990 753.1 753.20-753.23 1996 753.2 753.29 1996 753.2 758.81 1996 758.8 758.89 1996 758.9 759.81-759.82 1989 759.8 759.83 1994 759.89 759.89 1989 759.8 760.75 1991 760.79 760.76 1994 760.79 764.00-764.09 1988 764.0 764.10-764.19 1988 764.1 764.20-764.29 1988 764.2 764.90-764.99 1988 764.9 765.00-765.09 1988 765.0 765.10-765.19 1988 765.1 780.01-780.02 1992 780.0 780.03 1993 780.01 780.09 1992 780.0 780.57 1992 780.51, 780.53 781.8 1994 781.9 787.01-787.03 1994 787.0 787.91 1995 558.9 787.99 1995 787.9 788.20-788.21, 788.29 1993 788.2 788.30-788.39 1992 788.3 788.41-788.43 1993 788.4 788.61-788.62, 788.69 1993 788.6 789.00-789.07, 789.09 1994 789.0 789.30-789.37, 789.39 1994 789.3 789.40-789.47, 789.49 1994 789.4 789.60-789.67, 789.69 1994 789.6 790.91 1993 790.9 790.92 1993 286.9 790.93, 790.99 1993 790.9 795.71 1994 795.8 (Code deleted) 795.79 1994 795.7 795.8 1986 795.7 864.05 1992 864.09 864.15 1992 864.19 909.5 1994 909.9 922.31-922.33 1996 922.3 925.1-925.2 1993 925 989.81-989.84 1995 989.8 989.89 1995 989.8 995.50-995.55 1996 995.5 995.59 1996 995.5 995.60-995.69 1993 995.0 995.80 1996 995.81 995.81 (Code title restated) 1996 995.81 995.82-995.85 1996 995.81 996.04 1994 996.09 996.51-996.59 1987 996.5 996.60-996.69 1989 996.6 996.70-996.79 1989 996.7 996.80-996.84 1987 996.8 996.85 1990 996.8 996.86 1987 996.8 996.89 1987 996.8 997.00-997.01 1995 997.0 997.02 1995 997.9 & 430-434, 436 997.09 1995 997.0 997.91 1995 997.9 997.99 1995 997.9 998.11-998.12 1996 998.1 998.13 1996 998.89 998.51 1996 998.5 998.59 1996 998.5 998.81-998.82, 998.89 1994 998.8 998.83 1996 998.89 V03.81-V03.82, V03.89 1994 V03.8 V05.3-V05.4 1993 V05.8 V06.5-V06.6 1994 V06.8 V07.31,V07.39 1994 V07.3 V07.4 1992 V07.8 V08 1994 044.9, 795.8 (Codes deleted) V09.0-V09.91 1993 * No previous code assignments. V12.00-V12.03, V12.09 1994 V12.0 V12.50-V12.52 1995 V12.5 V12.59 1995 V12.5 V12.70-V12.72, V12.79 1994 V12.7 V13.00-V13.01, V13.09 1994 V13.0 V15.41-V15.42 1996 V15.4 V15.49 1996 V15.4 V15.82 1994 305.13 (Codes deleted) V15.84-V15.86 1995 V15.89 V23.7 1989 V23.8 V25.43 1992 V25.49 V25.5 1992 V25.8 V29.0-V29.1, V29.8 1992 V71.8 V29.2 1994 V29.8 (Note: Codes V29.3-V29.7 have not been assigned yet.) V29.9 1992 V71.9 V30.00-V30.01 1989 V30.0 V31.00-V31.01 1989 V31.0 V32.00-V32.01 1989 V32.0 V33.00-V33.01 1989 V33.0 V34.00-V34.01 1989 V34.0 V35.00-V35.01 1989 V35.0 V36.00-V36.01 1989 V36.0 V37.00-V37.01 1989 V37.0 V39.00-V39.0l 1989 V39.0 V43.60-V43.66, V43.69 1994 V43.6 V43.81-V43.82 1995 V43.8 V43.89 1995 V43.8 V45.00 1994 V45.89 V45.01 1994 V45.0 V45.02, V45.09 1994 V45.89 V45.51 1994 V45.5 V45.52, V45.59 1994 V45.89 V45.82 1994 V45.89 V45.83 1995 V45.89 V49.60-V49.67 1994 V49.5 V49.70-V49.77 1994 V49.5 V50.41-V50.42, V50.49 1994 V50.8 V53.31 1994 V53.3 V53.32, V53.39 1994 V53.9 V56.1 1995 V58.89 V57.21-V57.22 1994 V57.2 V58.41, V58.49 1994 V58.4 V58.61 1995 V67.51 V58.69 1995 V67.51 V58.81, V58.89 1994 V58.8 V58.82 1995 V58.89 V59.01-V59.02 1995 V59.0 V59.09 1995 V59.0 V59.6 1995 V59.8 V61.10-V61.12 1996 V61.1 V61.22 1996 V61.21 V62.83 1996 V65.49 V65.40-V65.45, V65.49 1994 V65.4 V66.7 1996 No previous code assignment. V69.0-V69.3 1994 * No previous code assignments. V69.8-V69.9 1994 * No previous code assignments. V72.81-V72.85 1993 V72.8 V73.88-V73.89 1993 V73.8 V73.98-V73.99 1993 V73.9 E854.8 1995 E858.8 E869.4 1994 E869.8 E880.1 1995 E884.9 E884.3-E884.4 1995 E884.2 E884.5-E884.6 1995 E884.9 E906.5 1995 E906.3 E908.0-E908.4 1995 E908 E908.8-E908.9 1995 E908 E909.0-E909.4 1995 E909 E909.8-E909.9 1995 E909 E920.5 1995 E920.4 E924.2 1995 E924.0 E967.2 1996 E967.0 E967.3 1996 No previous code assighnment. E967.4-E967.8 1996 E967.1 E968.5 1995 E968.8
PROCEDURE CODES Effective Current code(s) assignment October 1 Previous code(s) assignment 02.96 1992 89.19 03.90 1987 03.99 (Insertion of Catheter) 05.25 1995 39.7 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 32.22 1995 32.29, 32.9 32.28 1989 32.29 33.27 1987 33.22 + 33.27 33.28 1987 33.27 33.29 1987 33.28-33.29 33.50 1995 33.5 33.51 1995 33.5 33.52 1995 33.5 33.6 1990 33.5 + 37.5 34.05 1994 34.99 35.84 1988 35.82 35.96 1986 35.03 36.00-36.03 1986 36.0 36.04 1986 39.97 36.05 1987 36.01 36.05 1986 36.01 1/, 36.02 36.06 1995 36.01, 36.02, 36.03, 36.05 36.09 1986 36.0 36.09 1991 36.00 (Code deleted) 36.17 1996 36.19 37.26-37.27 1988 37.29 37.34 1988 37.33 37.65 1995 37.62 37.66 1995 37.62 37.70 (Leads only) 1987 37.70 (Leads/Device) 37.71-37.72 (Leads only) 1987 37.74 (Leads/Device) 37.73 (Leads only) 1987 37.73 (Leads/Device) 37.74 (Leads only) 1987 37.76 (Leads/Device) 37.75 (Leads only) 1987 37.89 (Leads/Device) 37.76 (Leads only) 1987 37.81 (Leads/Device) 37.77 (Leads only) 1987 37.83-37.84 (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 (Device only) 1987 37.73-37.77 (Leads/Device) 37.81 (Device only) 1987 37.73-37.77 (Leads/Device) 37.82 (Device only) 1987 37.73-37.77 (Leads/Device) 37.83 (Device only) 1987 37.73-37.77 (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 (Abdominal Aorta Only) 1986 38.44 (Entire Aorta) 38.45 (Thoracic Aorta Added) 1986 38.44-38.45 38.95 1989 38.93 39.28 1991 39.29 39.50 1995 39.59 39.65 1988 39.61 39.66 1990 39.65 39.90 1996 39.50 41.00-41.03 1988 41.0 41.04 1994 99.79 42.25 1988 42.24 42.33 1989 42.32, 42.39 42.33 1990 42.91 43.11 1989 43.1 43.19 1989 43.1, 43.2 43.41 1989 43.41,43.49 44.21 1986 44.2 44.22 1986 44.99 44.29 1986 44.2 44.43 1989 43.49,45.32 44.44 1989 38.86 44.49 1989 43.0 44.93-44.94 1986 44.99 45.16 1988 45.14 (45.15 before 1987) 45.30 1989 45.31,45.32 45.42 1988 45.41 45.43 1989 45.49 45.75 (Hartmann Resection Added) 1988 48.66 (Code deleted) 45.95 1987 45.93 46.13 1992 46.12 (Code deleted) 46.32 1989 46.39 46.85 1989 46.99 47.01 1996 47.0 47.09 1996 47.0 47.11 1996 47.1 47.19 1996 47.1 48.36 1995 45.42 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 51.21 1996 51.22, 51.23 51.22 1991 51.21 (Code deleted),51.22 51.23 1991 51.22 51.24 1996 51.22, 51.23 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 52.84 1996 99.29 52.85 1996 99.29 52.86 1996 99.29 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 54.51 1996 54.5 54.59 1996 54.5 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 59.03 1996 59.02 59.12 1996 59.11 59.72 1995 59.79 59.96 1986 59.95 60.21 1995 60.2 60.29 1995 60.2 60.95 1991 60.99 64.97 1986 64.95 65.01 1996 65.0 65.09 1996 65.0 65.13 1996 65.12 65.14 1996 65.19 65.23 1996 65.21 65.24 1996 65.22 65.25 1996 65.29 65.31 1996 65.3 65.39 1996 65.3 65.41 1996 65.4 65.49 1996 65.4 65.53 1996 65.51 65.54 1996 65.52 65.63 1996 65.61 65.64 1996 65.62 65.74 1996 65.71 65.75 1996 65.72 65.76 1996 65.73 65.81 1996 65.8 65.89 1996 65.8 66.01 1992 66.0 66.02 1992 66.73 68.15 1987 68.14 68.16 1987 68.13 68.23 1996 68.29 68.51 1996 68.5 68.59 1996 68.5 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 (Invalid code) 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 (Code deleted) 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 (Code deleted) 81.75 1989 81.87 (Code deleted) 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 92.3 1995 01.59, 04.07, 07.63, 07.68 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) 99.00 1995 99.02 99.15 1986 99.29 99.28 1994 99.25 99.71-99.74, 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." Codes 99.75-99.78 have not yet been reassigned.
Appendix CAdjusted Civilian Population* by Sex, Age, Geographic Region and Race
United States, July 1, 1997[Population estimates consistent with Series P-25,
Current Population Reports, U.S. Bureau of the Census]
Both sexes Male Female All ages 270,430 132,332 138,098 Northeast 51,968 25,191 26,777 Midwest 62,784 30,693 32,091 South 95,320 46,274 49,046 West 60,358 30,175 30,183 White 222,696 109,496 113,200 Black 35,143 16,682 18,460 All other 12,591 6,154 6,437 Under 15 years 59,749 30,588 29,161 Under 1 year 3,943 2,017 1,926 1-4 years 15,882 8,128 7,754 5-14 years 39,924 20,443 19,481 Northeast 10,804 5,533 5,271 Midwest 13,651 6,992 6,658 South 21,051 10,766 10,285 West 14,243 7,298 6,946 White 46,915 24,067 22,848 Black 9,614 4,878 4,736 All other 3,220 1,644 1,576 15-44 years 121,641 60,996 60,645 15-24 years 37,256 19,012 18,244 25-34 years 40,167 20,012 20,155 35-44 years 44,218 21,972 22,246 Northeast 23,057 11,502 11,555 Midwest 28,135 14,114 14,021 South 42,723 21,161 21,562 West 27,726 14,219 13,507 White 98,461 49,809 48,652 Black 16,923 8,104 8,820 All other 6,256 3,083 3,173 45-64 years 55,265 26,810 28,455 45-54 years 33,643 16,484 17,159 55-64 years 21,622 10,326 11,296 Northeast 10,903 5,245 5,658 Midwest 12,949 6,303 6,646 South 19,699 9,476 10,223 West 11,715 5,787 5,928 White 47,186 23,139 24,046 Black 5,823 2,610 3,213 All other 2,256 1,062 1,195 65 years and over 33,775 13,938 19,837 65-74 years 18,324 8,218 10,106 75-84 years 11,606 4,610 6,996 85 years and over 3,845 1,109 2,736 Northeast 7,203 2,911 4,292 Midwest 8,050 3,283 4,766 South 11,848 4,872 6,976 West 6,674 2,871 3,802 White 30,135 12,481 17,653 Black 2,782 1,091 1,691 All other 858 365 493 *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 1997 rates using the civilian resident population.
Adjusted Civilian Population of the United States, July 1, 1997. Estimates by Age, Sex, and Region.
Source: U.S. Bureau of the Census, Population Division Release PPL91R
United States Northeast Midwest South West
Age Total Male Female Total Male Female Total Male Female Total Male Female Total Male Female
Adjusted Civilian Population in Thousands
All ages 270,430 132,332 138,098 51,968 25,191 26,777 62,784 30,693 32,091 95,320 46,274 49,046 60,358 30,175 30,183 0-4 19,825 10,145 9,680 3,545 1,815 1,730 4,397 2,250 2,147 7,014 3,587 3,427 4,869 2,493 2,377 5-9 20,346 10,413 9,933 3,739 1,916 1,823 4,604 2,358 2,246 7,119 3,637 3,481 4,884 2,501 2,383 10-14 19,579 10,030 9,548 3,520 1,802 1,719 4,650 2,384 2,266 6,919 3,541 3,377 4,490 2,303 2,186 15-19 19,484 10,012 9,472 3,397 1,745 1,653 4,702 2,413 2,289 6,964 3,555 3,409 4,421 2,299 2,121 20-24 17,771 9,000 8,772 3,139 1,598 1,541 4,115 2,081 2,034 6,389 3,161 3,228 4,129 2,160 1,969 25-29 19,256 9,596 9,661 3,697 1,849 1,847 4,317 2,141 2,176 6,779 3,310 3,469 4,464 2,295 2,169 30-34 20,911 10,416 10,495 4,161 2,052 2,109 4,695 2,336 2,359 7,257 3,579 3,677 4,798 2,449 2,349 35-39 22,725 11,315 11,410 4,488 2,217 2,271 5,272 2,637 2,635 7,856 3,870 3,986 5,110 2,592 2,518 40-44 21,493 10,657 10,836 4,175 2,041 2,135 5,034 2,506 2,529 7,478 3,686 3,792 4,805 2,424 2,381 45-49 18,581 9,138 9,444 3,638 1,758 1,880 4,350 2,143 2,207 6,505 3,189 3,315 4,088 2,047 2,041 50-54 15,061 7,346 7,715 3,001 1,453 1,548 3,484 1,700 1,783 5,346 2,587 2,759 3,231 1,606 1,625 55-59 11,665 5,615 6,050 2,304 1,106 1,198 2,757 1,331 1,426 4,196 1,996 2,199 2,409 1,182 1,227 60-64 9,957 4,712 5,246 1,960 928 1,032 2,358 1,128 1,229 3,652 1,703 1,949 1,987 952 1,035 65-69 9,666 4,432 5,235 2,005 910 1,095 2,243 1,029 1,214 3,490 1,589 1,901 1,929 904 1,024 70-74 8,657 3,786 4,871 1,829 789 1,040 2,026 891 1,135 3,076 1,335 1,740 1,727 771 956 75-79 7,003 2,903 4,100 1,512 614 898 1,655 676 980 2,438 1,005 1,433 1,398 609 789 80-84 4,603 1,707 2,896 1,004 363 641 1,141 414 727 1,560 573 987 898 358 540 85+ 3,845 1,109 2,736 854 236 617 984 273 710 1,285 370 915 722 230 492 0-14 59,749 30,588 29,161 10,804 5,533 5,271 13,651 6,992 6,658 21,051 10,766 10,285 14,243 7,298 6,946 15-44 121,641 60,996 60,645 23,057 11,502 11,555 28,135 14,114 14,021 42,723 21,161 21,562 27,726 14,219 13,507 45-64 55,265 26,810 28,455 10,903 5,245 5,658 ERR 6,303 6,646 19,699 9,476 10,223 11,715 5,787 5,928 15+ 210,681 101,744 108,937 41,164 19,658 21,506 49,134 23,700 25,433 74,269 35,508 38,761 46,115 22,877 23,237 45+ 89,040 40,748 48,292 18,106 8,156 9,951 20,998 9,586 11,412 31,547 14,348 17,199 18,389 8,659 9,730 65+ 33,775 13,938 19,837 7,203 2,911 4,292 8,050 3,283 4,766 11,848 4,872 6,976 6,674 2,871 3,802 75+ 15,451 5,720 9,731 3,369 1,213 2,157 3,781 1,363 2,417 5,283 1,947 3,335 3,018 1,196 1,822
Adjusted Civilian Population of the United States, July 1, 1997.
Source: U.S. Bureau of the Census. Population Division Release PPL91R.
All races White Black Other races
Age Total Male Female Total Male Female Total Male Female Total Male Female
Adjusted Civilian population in thousands
All Ages 270,430 132,332 138,098 222,696 109,496 113,200 35,143 16,682 18,460 12,591 6,154 6,437 0-4 19,825 10,145 9,680 15,587 7,995 7,592 3,124 1,584 1,540 1,114 566 548 0 3,943 2,017 1,926 3,108 1,593 1,514 606 307 299 230 116 113 1 3,910 1,999 1,911 3,090 1,583 1,507 598 303 295 222 113 109 2 3,927 2,010 1,917 3,095 1,588 1,507 613 311 302 219 111 108 3 3,967 2,030 1,937 3,111 1,596 1,515 635 322 313 222 113 109 4 4,077 2,088 1,988 3,183 1,634 1,549 672 341 331 222 113 108 5-9 20,346 10,413 9,933 15,922 8,162 7,759 3,357 1,703 1,654 1,067 548 519 5 4,147 2,121 2,026 3,243 1,661 1,582 677 343 334 227 116 110 6 4,165 2,131 2,034 3,269 1,675 1,594 674 342 332 222 114 108 7 4,151 2,124 2,027 3,258 1,671 1,587 682 345 337 211 108 103 8 3,848 1,970 1,878 3,003 1,540 1,463 647 328 319 198 102 97 9 4,034 2,067 1,967 3,148 1,616 1,533 677 344 333 209 107 102 10-14 19,579 10,030 9,548 15,406 7,910 7,497 3,133 1,591 1,542 1,039 530 509 10 3,992 2,047 1,945 3,134 1,609 1,525 655 333 322 203 105 98 11 3,923 2,010 1,913 3,095 1,589 1,506 626 317 309 202 104 98 12 3,906 1,998 1,908 3,073 1,575 1,497 626 318 308 208 105 102 13 3,829 1,959 1,869 3,014 1,546 1,468 604 306 298 211 107 104 14 3,929 2,016 1,913 3,091 1,589 1,501 623 317 306 216 109 106 15-19 19,484 10,012 9,472 15,388 7,938 7,450 3,107 1,567 1,539 989 506 483 15 3,969 2,039 1,930 3,119 1,607 1,512 640 326 315 210 107 104 16 3,913 2,019 1,895 3,088 1,597 1,491 621 317 304 204 104 100 17 4,016 2,077 1,939 3,164 1,643 1,522 651 332 318 201 102 99 18 3,741 1,921 1,821 2,964 1,528 1,436 595 298 298 182 95 87 19 3,843 1,956 1,887 3,054 1,563 1,490 599 294 304 191 99 92 20-24 17,771 9,000 8,772 14,123 7,208 6,916 2,660 1,282 1,378 988 510 478 20 3,782 1,923 1,858 3,009 1,540 1,469 583 285 298 190 98 91 21 3,554 1,807 1,747 2,824 1,444 1,379 535 261 274 195 102 93 22 3,493 1,770 1,723 2,787 1,423 1,365 512 247 265 193 100 93 23 3,395 1,715 1,681 2,696 1,373 1,322 503 240 263 197 101 95 24 3,548 1,785 1,763 2,808 1,427 1,380 526 249 277 214 109 105 25-29 19,256 9,596 9,661 15,407 7,757 7,650 2,707 1,267 1,440 1,143 572 571 25 3,714 1,861 1,853 2,946 1,491 1,455 543 256 287 226 114 112 26 3,951 1,963 1,988 3,152 1,580 1,572 562 264 299 237 119 118 27 3,969 1,978 1,991 3,189 1,605 1,584 545 255 290 236 118 117 28 3,650 1,815 1,835 2,951 1,483 1,468 488 228 260 211 104 107 29 3,972 1,979 1,993 3,169 1,598 1,571 569 265 305 233 116 117 30-34 20,911 10,416 10,495 16,966 8,541 8,425 2,859 1,355 1,504 1,086 520 566 30 3,926 1,958 1,968 3,166 1,596 1,570 548 261 287 211 100 111 31 3,938 1,961 1,977 3,169 1,595 1,574 555 264 290 214 102 112 32 4,179 2,079 2,100 3,390 1,705 1,685 572 271 302 217 104 113 33 4,316 2,141 2,174 3,526 1,769 1,758 574 270 304 215 103 112 34 4,553 2,277 2,276 3,714 1,876 1,838 609 289 320 229 111 118 35-39 22,725 11,315 11,410 18,727 9,420 9,307 2,936 1,386 1,550 1,063 510 553 35 4,598 2,294 2,304 3,775 1,902 1,873 604 286 318 218 106 113 36 4,510 2,241 2,269 3,724 1,871 1,854 574 269 305 213 102 111 37 4,589 2,284 2,306 3,774 1,898 1,876 599 282 317 216 103 113 38 4,264 2,115 2,149 3,526 1,768 1,758 542 254 288 196 93 103 39 4,764 2,382 2,383 3,928 1,982 1,946 617 294 323 219 106 114 40-44 21,493 10,657 10,836 17,850 8,945 8,905 2,656 1,247 1,409 988 465 523 40 4,607 2,292 2,315 3,811 1,915 1,896 587 277 310 210 100 110 41 4,332 2,145 2,187 3,584 1,794 1,790 542 253 288 206 97 109 42 4,281 2,124 2,157 3,555 1,783 1,773 530 249 281 196 93 103 43 4,123 2,033 2,090 3,422 1,706 1,716 504 235 269 196 91 105 44 4,150 2,063 2,087 3,477 1,747 1,730 493 233 261 180 84 96 45-49 18,581 9,138 9,444 15,612 7,767 7,845 2,138 984 1,154 831 387 444 45 3,974 1,964 2,010 3,335 1,668 1,667 467 217 250 172 80 92 46 3,696 1,819 1,877 3,097 1,543 1,554 431 198 233 168 78 90 47 3,705 1,819 1,886 3,082 1,532 1,550 447 205 242 175 81 93 48 3,440 1,682 1,757 2,914 1,442 1,473 375 171 204 150 70 81 49 3,767 1,854 1,913 3,184 1,583 1,601 418 193 225 165 77 88 50-54 15,061 7,346 7,715 12,963 6,386 6,578 1,490 670 820 608 290 318 50 3,875 1,902 1,973 3,362 1,666 1,696 365 166 199 148 70 77 51 2,704 1,319 1,385 2,301 1,134 1,167 278 125 153 125 60 65 52 2,750 1,339 1,411 2,351 1,157 1,194 283 127 156 117 56 61 53 2,771 1,346 1,425 2,383 1,169 1,214 279 125 154 109 52 56 54 2,961 1,440 1,521 2,565 1,259 1,306 286 128 158 110 52 58 55-59 11,665 5,615 6,050 10,012 4,870 5,142 1,199 527 672 453 217 236 55 2,514 1,214 1,301 2,141 1,043 1,097 273 122 151 101 48 53 56 2,423 1,167 1,256 2,085 1,016 1,069 244 106 139 93 45 48 57 2,338 1,125 1,213 1,999 972 1,027 247 109 138 92 44 48 58 2,151 1,033 1,118 1,863 904 960 208 91 117 79 38 41 59 2,240 1,077 1,163 1,925 935 989 227 100 127 88 42 46 60-64 9,957 4,712 5,246 8,598 4,116 4,482 995 428 567 364 168 197 60 2,067 978 1,089 1,780 851 929 208 90 118 79 38 42 61 2,011 956 1,055 1,738 836 901 199 85 114 74 35 39 62 2,028 960 1,067 1,753 841 913 201 86 115 73 34 39 63 1,903 904 999 1,651 794 857 185 80 105 68 31 37 64 1,948 913 1,036 1,676 794 881 202 87 115 70 31 39 65-69 9,666 4,432 5,235 8,440 3,905 4,535 927 398 529 299 129 171 65 1,928 893 1,035 1,661 779 882 201 85 116 65 29 36 66 1,976 913 1,064 1,719 800 919 195 86 109 62 27 35 67 1,966 909 1,057 1,717 803 914 189 80 109 60 26 34 68 1,869 851 1,018 1,642 753 889 171 74 97 56 24 32 69 1,927 866 1,061 1,701 770 931 170 73 97 56 23 33 70-74 8,657 3,786 4,871 7,714 3,396 4,318 707 289 418 236 101 135 70 1,837 817 1,020 1,621 727 894 164 68 96 53 23 30 71 1,771 780 991 1,570 696 874 151 62 89 49 21 28 72 1,772 780 993 1,586 702 884 138 57 81 49 21 28 73 1,669 721 947 1,499 653 846 126 50 76 43 18 25 74 1,608 688 920 1,439 619 820 128 52 76 42 18 24 75-79 7,003 2,903 4,100 6,311 2,628 3,683 534 208 327 158 67 91 75 1,605 683 922 1,443 617 827 124 50 74 38 16 22 76 1,517 643 874 1,371 584 787 111 44 67 34 15 20 77 1,371 569 802 1,233 514 719 106 41 65 32 14 18 78 1,305 529 776 1,178 480 698 99 37 62 28 12 16 79 1,205 480 726 1,085 433 653 94 36 59 26 11 15 80-84 4,603 1,707 2,896 4,190 1,558 2,632 322 111 212 91 39 52 80 1,080 421 659 983 384 598 76 27 49 21 9 12 81 999 380 619 912 348 564 68 24 44 20 8 11 82 922 342 580 842 313 529 63 22 41 18 8 10 83 841 301 540 767 275 492 58 19 39 16 7 9 84 760 263 498 686 237 449 58 19 39 16 7 9 85-89 2,437 765 1,672 2,221 693 1,528 171 53 117 45 18 27 85 626 211 415 573 193 381 41 14 27 12 5 7 86 553 177 376 504 161 343 39 12 27 10 4 6 87 482 149 333 438 135 303 35 11 24 9 4 5 88 417 125 292 380 113 267 29 9 21 8 3 5 89 359 102 256 326 92 234 26 8 19 7 3 4 90-94 1,052 270 781 947 239 707 85 23 62 20 8 12 90 297 81 216 269 73 196 23 6 16 5 2 3 91 247 65 182 223 58 165 19 5 14 5 2 3 92 212 53 158 190 47 143 18 5 13 4 2 3 93 166 41 126 149 36 114 14 4 10 3 1 2 94 129 30 99 116 26 89 11 3 8 3 1 2 95-99 297 63 233 262 54 208 27 7 20 7 2 5 95 95 22 74 85 19 66 8 2 6 2 1 1 96 81 18 63 70 15 56 9 2 6 2 1 1 97 56 12 44 49 10 39 5 1 4 1 0 1 98 38 7 30 34 6 27 3 1 2 1 0 1 99 27 5 22 24 4 20 2 1 2 1 0 0 100+ 60 11 49 50 8 42 8 2 6 2 1 1 0-14 59,749 30,588 29,161 46,915 24,067 22,848 9,614 4,878 4,736 3,220 1,644 1,576 0-44 181,390 91,584 89,806 145,376 73,876 71,501 26,538 12,981 13,556 9,476 4,727 4,749 0-64 236,655 118,394 118,261 192,562 97,015 95,547 32,361 15,591 16,769 11,733 5,789 5,944 15-44 121,641 60,996 60,645 98,461 49,809 48,652 16,923 8,104 8,820 6,256 3,083 3,173 45-64 55,265 26,810 28,455 47,186 23,139 24,046 5,823 2,610 3,213 2,256 1,062 1,195 15+ 210,681 101,744 108,937 175,781 85,429 90,352 25,529 11,805 13,724 9,371 4,510 4,861 45+ 89,040 40,748 48,292 77,320 35,621 41,700 8,605 3,701 4,904 3,115 1,427 1,688 65+ 33,775 13,938 19,837 30,135 12,481 17,653 2,782 1,091 1,691 858 365 493 75+ 15,451 5,720 9,731 13,981 5,181 8,800 1,147 404 744 323 135 188 85+ 3,845 1,109 2,736 3,480 995 2,485 291 85 205 74 29 45
Appendix D
UNWEIGHTED FREQUENCIES FOR SELECTED VARIABLES NEWBORN INFANTS
NON-NEWBORNS
SURVEY YEAR
97
33,612
266,852
UNITS FOR AGE
1=Years 0
258,210 2=Months 0
6,126 3=Days 33,612
2,516 AGE GROUPS
Under 15 33,612 25,859 15-44 0 88,197 45-64 0 54,652 65 & Up 0 98,144 SEX 1=Male 17,193
105,713 2=Female 16,419
161,139 RACE 1=White 17,278 151,694 2=Black 4,154 35,778 3=AmInd/Esk 134 812 4=Asian/PI 862 3,555 5=Other 1,930 8,744 9=NotStated 9,254 66,269 MARITAL STATUS 1=Married 0 39,805 2=Single 10,783 24,194 3=Widowed 0 13,113 4=Divorced 0 4,663 5=Separated 0 926 9=NotStated 22,829 184,151 DISCHARGE STATUS 1=Routine 32,409 212,232 2=LAMA 11 2,030 3=TrShtTrm 385 7,703 4=TrLngTrm 44 21,547 5=Alive,NS 537 15,481 6=Dead 117 6,803 9=NotStated 109 1,056 LENGTH OF STAY FLAG 0=LT 1 day 529 5,299 1=1 day or more 33,083 261,553 NEWBORN INFANTS NON-NEWBORNS REGION 1=NorthEast 5,778 58,519 2=MidWest 10,423 82,671 3=South 11,323 91,519 4=West 6,088 34,143 BEDSIZE 1=6-99 2,883 30,490 2=100-199 7,623 62,770 3=200-299 8,268 58,230 4=300-499 10,181 80,141 5=500 & over 4,657 35,221 HOSPITAL OWNERSHIP 1=Proprietary 2,134 17,408 2=Government 2,844 24,678 3=Nonprofit 28,634 224,766 EXPECTED SOURCE OF PAYMENT, PRINCIPAL 0=No Charge 103 728 1=Worker's Comp 16 1,793 2=Medicare 43 98,775 3=Medicaid 9,593 37,389 4=Other Govt Payments 283 2,554 5=Blue Cross 3,362 19,490 6=Other Priv/Comm Ins 14,610 72,801 7=SelfPay 1,968 12,919 8=Other 3,398 18,701 9=Not Stated 236 1,702 ADMISSION MONTH 01=January 2,312 19,446 02=February 2,169 17,874 03=March 2,376 19,398 04=April 2,361 18,754 05=May 2,417 18,549 06=June 2,370 18,030 07=July 2,571 18,537 08=August 2,541 18,142 09=September 2,493 18,754 10=October 2,361 18,676 11=November 2,200 17,234 12=December 2,373 18,907 99=Missing 5,068 44,551 NEWBORN INFANTS NON-NEWBORNS FIRST-LISTED DIAGNOSIS VCODES 33,612 40,114 CHAPTER 1 0 7,874 CHAPTER 2 0 15,356 CHAPTER 3 0 11,052 CHAPTER 4 0 3,473 CHAPTER 5 0 16,922 CHAPTER 6 0 4,755 CHAPTER 7 0 51,429 CHAPTER 8 0 28,590 CHAPTER 9 0 24,802 CHAPTER 10 0 14,044 CHAPTER 11 0 4,796 CHAPTER 12 0 3,879 CHAPTER 13 0 12,691 CHAPTER 14 0 2,009 CHAPTER 15 0 1,670 CHAPTER 16 0 2,158 CHAPTER 17 0
21,238
WEIGHTED FREQUENCIES FOR SELECTED VARIABLES NEWBORN INFANTS NON-NEWBORNS SURVEY YEAR 97
3,789,839
30,914,167
UNITS FOR AGE 1=Years 0 30,139,011 2=Months 0 572,340 3=Days 3,789,839 202,816 AGE GROUPS Under 15 3,789,839 2,311,503 15-44 0 10,029,526 45-64 0 6,377,224 65 & Up 0 12,195,914 SEX 1=Male 1,931,256 12,267,559 2=Female 1,858,583 18,646,608 RACE 1=White 2,161,166 19,971,406 2=Black 461,685 3,689,251 3=AmInd/Esk 17,943 120,584 4=Asian/PI 100,455 388,162 5=Other 216,146 1,003,312 9=NotStated
832,444 5,741,452 MARITAL STATUS 1=Married 0 9,051,303 2=Single 2,392,001 5,370,731 3=Widowed 0 3,093,781 4=Divorced 0 1,087,456 5=Separated 0 168,746 9=NotStated 1,397,838 12,142,150 DISCHARGE STATUS 1=Routine 3,624,857 24,436,142 2=LAMA 2,182 219,521 3=TrShtTrm 50,088 1,206,021 4=TrLngTrm 5,735 2,544,501 5=Alive,NS 61,357 1,482,359 6=Dead 12,835 782,838 9=NotStated 32,785 242,785 LENGTH OF STAY FLAG 0=LT 1 day 67,707 689,528 1=1 day or more 3,722,132 30,224,639 NEWBORN INFANTS NON-NEWBORNS REGION 1=NorthEast 604,959 6,679,107 2=MidWest 850,556 7,234,030 3=South 1,423,281 11,445,029 4=West 911,043 5,556,001 BEDSIZE 1=6-99 655,571 6,403,367 2=100-199 1,089,232 8,135,109 3=200-299 679,540 5,849,513 4=300-499 961,071 7,022,870 5=500 & over 404,425 3,503,308 HOSPITAL OWNERSHIP 1=Proprietary 471,682 3,395,267 2=Government 459,336 3,662,500 3=Nonprofit 2,858,821 23,856,400 EXPECTED SOURCE OF PAYMENT, PRINCIPAL 0=No Charge 14,170 98,497 1=Worker's Comp 1,521 230,175 2=Medicare 9,548 12,253,599 3=Medicaid 1,223,610 4,379,531 4=Other Govt Payments 44,658 367,744 5=Blue Cross 380,097 2,216,013 6=Other Priv/Comm Ins 1,656,054 8,618,340 7=SelfPay 233,284 1,487,100 8=Other 171,212 958,139 9=Not Stated 55,685 305,029 ADMISSION MONTH 01=January 275,521 2,508,228 02=February 261,540 2,260,850 03=March 282,192 2,479,300 04=April 284,308 2,361,873 05=May 292,699 2,383,849 06=June 282,342 2,289,355 07=July 300,305 2,327,633 08=August 306,075 2,222,167 09=September 283,344 2,283,817 10=October 283,070 2,314,296 11=November 278,983 2,128,485 12=December 294,390 2,358,700 99=Missing 365,070 2,995,614 NEWBORN INFANTS NON-NEWBORNS FIRST-LISTED DIAGNOSIS VCODES 3,789,839 4,317,536 CHAPTER 1 0 853,472 CHAPTER 2 0 1,748,574 CHAPTER 3 0 1,298,546 CHAPTER 4 0 372,732 CHAPTER 5 0 1,963,955 CHAPTER 6 0 553,984 CHAPTER 7 0 6,097,056 CHAPTER 8 0 3,474,793 CHAPTER 9 0 2,997,914 CHAPTER 10 0 1,694,207 CHAPTER 11 0 500,197 CHAPTER 12 0 453,568 CHAPTER 13 0 1,499,946 CHAPTER 14 0 155,301 CHAPTER 15 0 137,580 CHAPTER 16 0 274,389 CHAPTER 17 0 2,520,417 NEWBORN INFANTS NON-NEWBORNS ALL-LISTED DIAGNOSES TOTAL 7,245,315 129,657,636 ECODES 5,768 3,584,938 VCODES 4,521,359 9,900,945 CHAPTER 1 37,956 3,460,434 CHAPTER 2 12,911 4,333,299 CHAPTER 3 12,694 12,777,158 CHAPTER 4 6,019 4,053,246 CHAPTER 5 451 7,958,801 CHAPTER 6 13,661 3,542,537 CHAPTER 7 17,135 27,462,634 CHAPTER 8 13,030 9,961,729 CHAPTER 9 21,580 8,176,753 CHAPTER 10 31,473 6,935,224 CHAPTER 11 0 8,246,897 CHAPTER 12 22,596 1,579,259 CHAPTER 13 10,988 4,568,309 CHAPTER 14 235,665 560,539 CHAPTER 15 2,221,071 368,115 CHAPTER 16 53,596 6,295,830 CHAPTER 17 7,362 5,890,989 ALL-LISTED PROCEDURES TOTAL 2,498,324 40,509,419 CHAPTER 1 48,694 1,042,944 CHAPTER 2 0 104,207 CHAPTER 3 760 134,911 CHAPTER 4 346 47,200 CHAPTER 5 2,966 311,224 CHAPTER 6 12,486 1,015,624 CHAPTER 7 92,858 5,382,095 CHAPTER 8 255 342,317 CHAPTER 9 12,152 5,052,040 CHAPTER 10 4,251 989,743 CHAPTER 11 1,213,323 316,863 CHAPTER 12 253 2,067,680 CHAPTER 13 0 6,682,247 CHAPTER 14 1,861 3,172,485 CHAPTER 15 9,893 1,219,594 CHAPTER 16 1,098,226 12,628,245
