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Am J Epidemiol. 1978 Jan;107(1):71-6.

Estimating prevalence from the results of a screening test.

Abstract

This paper deals with some basis properties of screening tests. Such tests purport to separate people with disease from people without. Minimal criteria for such a process to be a test are discussed. Various ways of judging the goodness of a test are examined. A common use of tests is to estimate prevalence of disease; frequency of positive tests is shown to be a bad estimate, and the necessary adjustmants are given.

PMID:
623091
[PubMed - indexed for MEDLINE]
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