Relative Risk Vs Risk Ratio

Relative Risk (RR) is a measure used in epidemiology to compare the risk of a certain event occurring (such as developing a disease) between two groups. It is calculated by dividing the probability of the event occurring in the exposed group by the probability of the event occurring in the unexposed group. A relative risk of 1 indicates no difference in risk between the two groups, while a value greater than 1 suggests an increased risk in the exposed group, and a value less than 1 indicates a decreased risk.

Risk Ratio, often used interchangeably with Relative Risk, specifically refers to the same concept of comparing the risk of an event between two groups. It quantifies the likelihood of an adverse outcome occurring in the exposed group relative to the unexposed group. The risk ratio is particularly useful in cohort studies and clinical trials, as it provides a clear sense of the strength of an association between exposure and outcome, thereby helping to inform public health decisions and interventions.