You conduct a study of 1,000 people and determine that 137 have a virus and test positive with your screen. 21 have the virus and test negative with your screen. 506 do not have the virus and test negative with your screen. What is the prevalence rate of the disease?
A) 15.8%
B) 13.7%
C) 2.1%
D) Unable to determine because this is incidence data

Question

Quizplus · Accepted Answer

Prevalence rate is the number of people with the disease at a specific point in time divided by the total population. In this case, the prevalence rate is 137 / 1000 = 13.7%.

You Conduct a Study of 1,000 People and Determine That