Definition Of Risk Ratio In Statistics

Relative risk utilizes the probability of an event occurring in one group compared to the probability of an event occurring in.

Definition of risk ratio in statistics. This prospective cohort study was used to investigate the effects of hormone replacement therapy hrt on coronary artery disease in post. Consider an example from the nurses health study. Relative risk rr is often used when the study involves comparing the likelihood or chance of an event occurring between two groups. Relative risk is considered a descriptive statistic not an inferential statistic.

It does so by dividing the risk incidence proportion attack rate in group 1 by the risk incidence proportion attack rate in group 2. As it does not determine statistical significance. A risk ratio rr also called relative risk compares the risk of a health event disease injury risk factor or death among one group with the risk among another group. The odds ratio and relative risk are similar if the total sample is large and the vente is rare.

The relative risk rr or risk ratio is the ratio of the probability of an outcome in an exposed group to the probability of an outcome in an unexposed group. The odds ratio looks at the odds of being in a particular treatment group given that you had the disease. It is computed as where is the incidence in the exposed group and is the incidence in the unexposed group. Together with risk difference and odds ratio relative risk measures the association between the exposure and the outcome.