This study is maintained and distributed by the National Archive of Computerized Data on Aging (NACDA), the aging program within ICPSR. NACDA is sponsored by the National Institute on Aging (NIA) at the National Institutes of Heath (NIH).
National Hospital Discharge Survey, 2005 (ICPSR 20380)
The 2005 National Hospital Discharge Survey (NHDS) collects medical and demographic information annually from a sample of hospital discharge records. Variables include patients' demographic characteristics (sex, age, race, marital status), dates of admission and discharge, source and type of admission, 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. The medical information is coded using the INTERNATIONAL CLASSIFICATION OF DISEASES, 9TH REVISION, CLINICAL MODIFICATION (ICD-9-CM).
The public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.
WARNING: This study is over 150MB in size and may take several minutes to download on a typical internet connection.
United States Department of Health and Human Services. National Center for Health Statistics. National Hospital Discharge Survey, 2005. ICPSR20380-v2. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2007-12-13. http://doi.org/10.3886/ICPSR20380.v2
Persistent URL: http://doi.org/10.3886/ICPSR20380.v2
Scope of Study
Geographic Coverage: United States
Detailed information regarding ICD-9 codes can be found in the documentation.
Sample: In 2005, the sample consisted of 501 hospitals. Of the 501 hospitals, 28 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 473 in-scope (eligible) hospitals, 444 hospitals responded to the survey.
Weight: These data contain one weight variable, weight. Users should refer to the technical documentation for further information regarding the weight and its derivation. Additionally, users may need to weigh the data prior to analysis.
Extent of Processing: ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:
- Created online analysis version with question text.
Restrictions: In preparing the data file 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: 2007-08-13
- 2007-12-13 Numeric variables have been created for diagnosis and procedure codes.
- Citations exports are provided above.
Export Study-level metadata (does not include variable-level metadata)
If you're looking for collection-level metadata rather than an individual metadata record, please visit our Metadata Records page.