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What is True statement about PPV is: and explain in detail?
Ans. (a) It increases with prevalenceRef: K. Park 23rd ed. /140-141# POSITIVE PREDICTIVE VALUE* Ability of screening test to identify correctly all those who have disease out of all those who test positive on a screening test.* It depends upon sensitivity, specificity and prevalence of a disease in a population* PPV of a screening is directly proportional to prevalence of disease* If Prevalence of a disease increases in a population, PPV increase for the screening test.PPV=TP/TP+FP x 100