Attributable risk measures the difference in disease incidence between an exposed group and an unexposed group, indicating the excess risk due to exposure. Relative risk (RR), also called the risk ratio, is a measure comparing the risk of a disease between two groups. It is calculated as: Relative Risk (RR) = (Incidence rate in exposed group) / (Incidence rate in unexposed group) A relative risk greater than 1 suggests a positive association between exposure and disease, indicating that the exposure might increase the risk of developing the disease.
