Definitions for "Absolute risk reduction"
Keywords:  arr, eer, cer, arithmetic, experimental
a measure of treatment effect that compares the probability (or mean) of a type of outcome in the control group with that of a treatment group, [i.e.: Pc - Pt (or µc - µt)]. For instance, if the results of a trial were that the probability of death in a control group was 25% and the probability of death in a treatment group was 10%, the absolute risk reduction would be (0.25 - 0.10) = 0.15. (See also number needed to treat, odds ratio, and relative risk reduction.)
The absolute arithmetic difference in events rates, ( EER- CER).
( ARR) the difference in the absolute risk (rates of adverse events) between study and control populations. ( Therapy) To Calculation