2.1.2.2. Relative risk

The Relative risk is a  measure of the chance of developing a disease after a particular exposure. It is calculated by dividing the incidence rate in an exposed population (Ie) by the incidence rate in an unexposed population (Io).

Equation 2.1.2.2

 

Table 3. Structure of data for calculation of Relative Risk. Both disease outcome and risk factor exposure are dichotomous.

Table 3