In assessing the relative merits of case‐control and cohort studies, which one of the following statements is correct?

Question

Quizplus · Accepted Answer

Unlike case‐control studies, cohort studies permit the direct calculation of
incidence rates.In cohort studies information on person‐time over the period of follow‐
up can be used to calculate the incidence rate (i.e.incident cases divided by person‐
time).However, it is also worth noting that while incidence rates can't be calculated
directly from case‐control studies, it is sometimes possible to use the sampling rates of
cases and controls to estimate the incidence rate.In general, case‐control studies are
less costly and quicker to complete and more suited to studying a rare disease than a
cohort study.

In Assessing the Relative Merits of Case‐control and Cohort Studies