Catalog of Holdings

Study Report

Study Number: QG-030-008-1-1-United States-ICPSR-1980

Subject Area: Medical and Health

Bibliographic Citation: National ambulatory medical care survey, 1980: drug mentions.  [machine-readable data file] / U.S. Department of Health and Human Services. National Center for Health Statistics  [principal investigator(s)] / Ann Arbor, MI: Inter-university Consortium for Political and Social Research  [distributor].

Originating Archive Number: 9174

Date Accessioned: 8/4/1994

Number of Files Received: 1

Access Status: Access limited to UW-Madison campus

Date Ordered: 7/15/1994

Documentation: 1 volume hard copy and one duplicate.

Abstract: This data collection is the latest in a series of surveys that offer information on patients' visits to a national sample of office-based physicians. The National Ambulatory Medical Care Surveys (NAMCS) collect information on all drugs/medications ordered, administered, or provided during the visits. In 1980 51,372 drugs were mentioned in the national sample of 46,081 patient visits. The data items include the medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes.


UNIVERSE: Office visits to nonfederally employed physicians classified by the American Medical Association (AMA) or the American Osteopathic Association (AOA) as ''office-based, patient care'' (excluding specialties of anesthesiology, pathology, and radiology), from 87 Primary Sampling Units (PSUs) in the United States.

SAMPLE: Stratified multistage probability design. In the first stage the PSUs were selected by a modified probability proportional-to-size procedure using separate sampling frames for SMSAs and for nonmetropolitan counties. The second stage consisted of a probability sample of practicing physicians selected from the master files maintained by the AMA and AOA. Within each PSU, all eligible physicians were stratified by nine specialty groups. The groups are: general/family practice, internal medicine, pediatrics, other medical specialties, general surgery, obstetrics/gynecology, other surgical specialties, psychiatry, and other specialties. The final stage was the selection of patient visits within the annual practices of sample physicians. This involved two steps. First, the total physician sample was divided into 52 with each physician randomly assigned to one of the 52 weeks in the survey year. Second, a systematic random sample of visits was selected by the physician during the assigned week.


RESTRICTIONS: In preparing the data tapes for these collections, 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.

DATA TYPE: survey data




National Center for Health Statistics. ''National Ambulatory Medical Care Survey: Background and Methodology, United States.' VITAL AND HEALTH STATISTICS. Series 2-No. 61 DHEW Pub. (HRA) 74-1335. Health Resources Administration. Washington, DC: United States Government Printing Office, 1974. National Center for Health Statistics. ''1980 Summary: National Ambulatory Medical Care Survey, United States.'' Advance Data from Vital and Health Statistics, No. 77. DHEW Publication No. (PHS) 82-1250. Hyattsville, MD: Public Health Service. National Center for Health Statistics. INTERNATIONAL CLASSIFICATION OF DISEASES. 9TH REVISION, CLINICAL MODIFICATION. DDHS Pub. No. (PHS) 80-1260. Public Health Service. Washington, DC: United States Government Printing Office, 1980.

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