A test has a high false positive rate in a community. True is
The propoion of false-positive results among those who test positive is 1 minus the positive predictive value. False positive (discovery) rate = 1- positive predictive valueAs the disease prevalence increases, the positive predictive value increases. (PPV)As prevalence increase, PPV increase, False positive rate decrease.
Screening
High prevalence
Low prevalence
High sensitivity
High specificity
Low prevalence