Which of the following would be the best method to increase the positi

Which of the following would be the best method to increase the positive predictive value of a screening test?

a. Test a large population at once
b. Test a group at high risk for the health problem
c. Use a very sensitive screening test
d. Use a very specific screening test

ESSAYBID ANSWER

ANS: B
The positive predictive value is affected by what proportion of the tested population has the problem. To increase the positive predictive value, screen populations most at risk for the problem. Testing a large population at once, using a very sensitive or very specific screening test would not increase the positive predictive value of a screening test.