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American Journal of Epidemiology Vol. 121, No. 3: 430-439
Copyright © 1985 by The Johns Hopkins University School of Hygiene and Public Health

research-article

A DENTAL X-RAY VALIDATION STUDY

COMPARISON OF INFORMATION FROM PATIENT INTERVIEWS AND DENTAL CHARTS

SUSAN PRESTON-MARTIN1,, LESLIE BERNSTEIN1, ALISON ANDREWS MALDONADO1, BRIAN E. HENDERSON1 and STUART C. WHITE2

1Department of Preventive Medicine, University of Southern California School of Medicine Los Angeles, CA
2Section of Oral Radiology, University of California at Los Angeles School of Dentistry Los Angeles, CA

Reprint requests to Dr. Preston-Martin, Parkview Medical Building B-301, University of Southern California School of Medicine, 2025 Zonal Avenue, Los Angeles, CA 90033

Information was collected from dentists of a subset of participants in a case-control interview study conducted in Los Angeles County, California, in August 1980-August 1981 to evaluate the relationship of dental x-rays to tumors of the parotid gland. Complete dental charts were available from 142 dentists of 84 cases and from 130 dentists of 79 controls. Analysis of data from these interview-chart comparisons indicates that recall appears to be unbiased since the measures of agreement between interview and dental chart data are similar for cases and controls. The authors further conclude that interview data alone may be used for case-control comparisons of dental x-ray exposure and would, because of unbiased misclassification, tend to underestimate the relative risks.

dental records; epidemiologic methods; interviews; x-rays


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