Article
Apolipoprotein E genotyping as a diagnostic adjunct for Alzheimer's disease.
International psychogeriatrics - 1 Jan 1997
Roses A D, Saunders A M
Abstract excerpt
Positive predictive value (PPV) estimates how often a particular test predicts the eventual diagnosis, and it is the basis of any test that attempts to establish a diagnosis. Calculating the PPV depends directly on the entrance criteria for considering the diagnosis and the exit criteria of the generally accepted "gold standard" for establishing the ultimate diagnosis. For a relatively common disease such as AD,...
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