Epidemiology

1. True or False: Assuming equivalent test validity and reliability across communities, diagnostic tests of patients from communities with higher prevalence of the disease being tested for will have higher positive predictive values than tests of patients from communities with lower prevalence of the disease.

2. True or False: Assuming equivalent test validity and reliability across communities, screening tests conducted in communities with a high prevalence of the disease being screened for will have higher yields than if done in communities with lower prevalence of the disease.