An epidemiologist studies rates of depression in a community over a one-year period.Her calculation of incidence will be based on the

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Incidence refers to the number of new cases that develop during a specific time period. In this case, the epidemiologist is studying rates of depression over a one-year period, so the calculation of incidence should be based on the number of new cases (i.e. new cases of depression) that developed within that year. Option A is incorrect because cure rates are not relevant to the calculation of incidence. Option B is incorrect because it refers to the proportion of people who have ever had depression, rather than the number of new cases in a specific time period. Option D is incorrect because it refers to the total number of active cases on only one day, rather than taking into account new cases that may have developed over the entire year.

An Epidemiologist Studies Rates of Depression in a Community Over