True statement about PPV is:
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
It increases with prevalence
It decreases with prevalence
No relation with prevalence
Increases incidence
Screening