The proportion of positive responses to a diagnostic test for disease that are accurate indicators of the true presence of the malady in a population. Expressed arithmetically as a proportion calculated as the number of true‐positive responses divided by the sum of true‐positive responses plus false‐positive responses, i.e., positive predictive value = TP/(TP + FP).
The proportion of people whose test results are “true” positives and who are actually ill.