Risk ratio
= Risk ratio
{title2=$\operatorname{RR}$}
= Relative risk
{synonym}
The risk ratio compares event probabilities in two groups:
$$
\operatorname{RR}=\frac{P(\text{event}\mid\text{exposed})}
{P(\text{event}\mid\text{reference})}.
$$
= Risk ratio
{title2=$\operatorname{RR}$}
= Relative risk
{synonym}
The risk ratio compares event probabilities in two groups:
$$
\operatorname{RR}=\frac{P(\text{event}\mid\text{exposed})}
{P(\text{event}\mid\text{reference})}.
$$