Population is 10,000. Of these 20% is having disease. The screening test has 95% sensitivity and 80% specificity. PPV is-
Ref:Parks 23rd edition pg 139 Construct a 2x2 table using the above data. 1900 1600 100 6400 PPV = TP / (TP +FP) = 1900/ (1900+1600) =54.3
54.3%`
98.50%
47.50%
20%
Screening