Question

In a small town in New York, we initiated a cohort study and followed 5,900 people for a mean follow-up of 2 years. At the end of the 2nd year, none of the participants was lost to follow-up. During this follow-up, we identified 600 cases of malaria. What was the cumulative incidence?

a. 10.1%
b. 10.1 per 1,000
c. 50.8%
d. 10 cases

Answer 1

Option A

Explanation:

From the question we are told that:

Sample size n=5900

Number of newly developed cases No.C=600

Generally the equation for Cumulative Incidence is mathematically given by

`CI=(No.C)/(n)`

`CI=(600)/(5900)`

`CI=0.101`

`CI= 10.1%`

Option A