<prompt> A test has a high false positive rate in a community. True isHigh prevalenceLow prevalenceHigh sensitivityHigh specificity  <response>: 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. PPVAs prevalence increase, PPV increase, False positive rate decrease. 