National Hospital Discharge Survey, 1990 (ICPSR 6222)
The National Hospital Discharge Survey (NHDS) collects medical and demographic information annually from a sample of hospital discharge records. Variables include the patients' demographic characteristics (sex, age, race, marital status), dates of admission and discharge, status at discharge, final diagnoses, surgical and nonsurgical procedures, dates of surgeries, and sources of payment. Information on hospital characteristics such as bedsize, ownership, and region of the country is also included.
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U.S. Dept. of Health and Human Services, National Center for Health Statistics. NATIONAL HOSPITAL DISCHARGE SURVEY, 1990. Hyattsville, MD: U.S. Dept. of Health and Human Services, National Center for Health Statistics [producer], 1991. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 1993. https://doi.org/10.3886/ICPSR06222.v1
Persistent URL: https://doi.org/10.3886/ICPSR06222.v1
Scope of Study
Subject Terms: demographic characteristics, health care facilities, hospitalization, hospitals, illness, medical care, medical evaluation, medical procedures, medical records, patients, payment methods, treatment
Geographic Coverage: United States
Per agreement with NCHS, ICPSR distributes the data file(s) and technical documentation in this collection in their original form as prepared by NCHS. In 1988, the NHDS was redesigned to provide geographic sampling comparability with other surveys conducted by the National Center for Health Statistics (NCHS), to update the sample of hospitals selected into the survey, and to maximize the use of data collected through automated systems. Changes in the survey may affect trend data. That is, some of the differences between NHDS statistics based on the 1965-1987 sample and statistics based on the sample drawn for the new design may be due to sampling error rather than changes in hospital utilization.
Sample: The redesigned (as of 1988) NHDS sample includes with certainty all hospitals with 1,000 or more beds or 40,000 or more discharges annually. The remaining sample of hospitals is based on a stratified three-stage design. The first stage consisted of selection of 112 primary sampling units (PSUs) that comprise a probability subsample of PSUs used in the 1985-1994 National Health Interview Surveys. The second stage consists of selection of noncertainty hospitals from the sample PSUs. At the third stage, a sample of discharges was selected by a systematic random sampling technique.
hospital discharge records
Restrictions: In preparing the data tape(s) for this collection, the National Center for Health Statistics (NCHS) has removed direct identifiers and characteristics that might lead to identification of data subjects. As an additional precaution, NCHS requires, under Section 308(d) of the Public Health Service Act (42 U.S.C. 242m), that data collected by NCHS not be used for any purpose other than statistical analysis and reporting. NCHS further requires that analysts not use the data to learn the identity of any persons or establishments and that the director of NCHS be notified if any identities are inadvertently discovered. ICPSR member institutions and other users ordering data from ICPSR are expected to adhere to these restrictions.
Original ICPSR Release: 1994-03-10
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