Question

A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Three hundred people are screened at a clinic during the first year the new test is implemented. Assume the true prevalence of Lyme disease among clinic attendees is 10%.

Calculate the following: The predictive value of a positive test is:

a. 22.2%

 

b. 94.0%

 

c. 6.0%

 

d. 33.0%

 

e. 18.2%