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Epidemiologic inquiry: observational studies
1Department of Family and Community Medicine, University of Missouri-Columbia 65201.
Family Medicine
|July 1, 1988
Abstract:
A major objective of epidemiologic investigation is to determine whether or not an association between an exposure and a condition exists in a human population. The presence of such an association cna be explored using three distinct strategies, the cohort, the case-control, and the cross-sectional approaches. This paper describes each of these research designs and discusses their advantages and disadvantages.