What does RR stand for?

Rust Remover

Rust Resistanm

Ruthenidm Red

Ruth Robertson

Rutland Railway

Ruweisat Ridge

Rx Read

Ryan Reynolds

Relative Risk

The ratio of the risk of disease or death among the exposed to the risk among the unexposed; this usage is synonymous with risk ratio; alternatively, the ratio of the cumulative incidence rate in the exposed to the cumulative incidence rate in the unexposed, i.e., the cumulative incidence ratio, and the term ``relative risk'' has also been used synonymously with ``odds ratio'' and, in some biostatistical articles, has been used for the ratio of forces of morbidity.