National Hospital Ambulatory Medical Care Survey, 2002 (ICPSR 4405)

Principal Investigator(s):

Summary:

The National Hospital Ambulatory Medical Care Survey (NHAMCS) provides data from samples of patient records selected from emergency departments (EDs) and outpatient departments (OPDs) of a national sample of hospitals. The resulting national estimates describe the use of hospital ambulatory medical care services in the United States. For the 2002 survey, data were collected from 224 OPDs and 376 EDs. Among the variables included are age, race, and sex of the patient, reason for the visit, physician's diagnoses, cause of injury (EDs only), surgical procedures (OPDs only), medication therapy, and expected source of payment. For 2002, a number of updates and revisions have been made to the drug characteristics data. The variables CSTRATM and CPSUM have been added to assist in the computation of variances.

Series: National Hospital Ambulatory Medical Care Survey Series

Access Notes

  • These data are freely available.

Dataset(s)

WARNING: This study is over 150MB in size and may take several minutes to download on a typical internet connection.

DS0:  Study-Level Files
Documentation:
DS1:  Emergency Department Data - Download All Files (183.8 MB) large dataset
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DS2:  Outpatient Department Data - Download All Files (173.1 MB) large dataset
Documentation:
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ASCII + SAS Setup    SPSS Setup    Stata Setup   
Analyze Online:

Study Description

Citation

U.S. Dept. of Health and Human Services. National Center for Health Statistics. NATIONAL HOSPITAL AMBULATORY MEDICAL CARE SURVEY, 2002. ICPSR04405-v1. Hyattsville, MD: U.S. Dept. of Health and Human Services, National Center for Health Statistics [producer], 2004. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2006-02-17. http://doi.org/10.3886/ICPSR04405.v1

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Scope of Study

Subject Terms:   ambulatory care, emergency services, health care services, hospitalization, hospitals, injuries, medical care, medical evaluation, medical procedures, medical records, patient care, patients, payment methods, surgery, treatment

Geographic Coverage:   United States

Time Period:  

  • 2002

Date of Collection:  

  • 2002-01-01--2002-12-27

Universe:   Visits to the emergency and outpatient departments of noninstitutional general and short-stay hospitals within the 50 states and the District of Columbia, which had an average length of stay of less than 30 days, or to hospitals whose specialty was general (medical or surgical) or children's general. Excluded were federal hospitals, hospital units within institutions, and hospitals with less than six beds staffed for patient use.

Data Types:   administrative records data

Data Collection Notes:

(1) Per agreement with NCHS, ICPSR distributes the data files and text of the technical documentation for this collection as prepared by NCHS. (2) Detailed information regarding the use of weight variables and variance estimation is located in the User Guide.

Methodology

Sample:   The NHAMCS used a four-stage probability design with samples of primary sampling units (PSUs), hospitals within PSUs, clinics within hospitals, and patient visits within clinics.

Weight:   Users should use the variable PATWT when performing analyses.

Data Source:

Patient visit records from hospital emergency departments and outpatient departments.

Restrictions: In preparing the data files 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.

Version(s)

Original ICPSR Release:  

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