An epidemiologist studied depression in a community of 100 people. At the beginning of the study, she found that 10 people already qualified for the diagnosis. By the end of the study, 10 new cases had developed. What is the incidence rate of depression in this community during the study?

Question

Quizplus · Accepted Answer

The incidence rate is calculated as the number of new cases divided by the population at risk. Here, 10 new cases developed in a population of 90 people (100 total minus the 10 already diagnosed), resulting in an incidence rate of 10/90, which is approximately 11.1%, rounded to 10%.

An Epidemiologist Studied Depression in a Community of 100 People