Relative Risk Reduction Calculator

The relative risk reduction (rrr) is a amount that can be obtained by dividing the absolute risk reduction by the control event rate.

Relative Risk Reduction (RRR) Calculation

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Formula:

RRR = (EER - CER) /CER EER = EE / ES ES = EE + EN CER = CE / CS CS = CE + CN Where, RRR = Relative Risk Reduction [ if (r is negative, then it is Relative Risk Reduction), if (r is positive, then it is Relative Risk Increase) ] EER = Experimental Event Rate CER =Control Group Event Rate EE = Experimental Events EN = Experimental Non Events ES = Experimental Total Subjects CE = Control Group Events CN = Control Group Non Events CS = Control Group Total Subjects

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