When the duration of a disease becomes short and the inciden

When the duration of a disease becomes short and the incidence is high, the prevalence becomes similar to incidence. True False

In case-control studies, the odds ratio is used as an estimate of the relative risk. In order for this approximation to be reasonable, some conditions must be met. Which of the following conditions is not necessary in order to use the odds ratio to estimate the relative risk?

With respect to exposure, controls are representative of the population to which you want to generalize your results.

The event (disease) under study is rare in the population.

The exposure in question is rare in the population.

Cases are representative of all cases.

Solution

In order for us to be able to estimate the relative risk using odds ratio, the necessary conditions are:

Therefore, the left-over condition, that is \"The exposure in question is rare in the population.\" is not necessary.