In a nearby town,two people had anxiety disorders in the past but not now.Three people developed anxiety disorders four or five years ago,and continue to have an anxiety disorder now.Six people developed anxiety disorders this year and continue to be so diagnosed.Which of the following might an epidemiologist write in her report concerning the rate of mental disorders in this community?

Question

Quizplus · Accepted Answer

The incidence refers to the number of new cases that occurred within a set period, which in this case is one year. Six people developed anxiety disorders this year, so the incidence is 6. The lifetime prevalence refers to the proportion of people in the community who have had the disorder at some point in their lives. The total number of people with anxiety disorders in this community is 2 (past anxiety disorders) + 3 (anxiety disorders developed 4-5 years ago) + 6 (anxiety disorders developed this year), which is 11. Therefore, the correct answer is B, with an incidence of 6 and a lifetime prevalence of 11.

In a Nearby Town,two People Had Anxiety Disorders in the Past