| or2rr {metainc} | R Documentation |
Calculate risk ratios from odds ratios and baseline risk
Description
Calculate risk ratios from odds ratios and baseline risk.
Usage
or2rr(or, br)
Arguments
or |
Odds ratio(s). |
br |
Baseline risk (also known as assumed comparator risk), i.e., risk that the outcome of interest would occur in the comparator intervention. It must be expressed as a value between 0 and 1. |
Details
Converts odds ratios (OR) into risk ratios (RR) using the formula available in Schunemann et al. (2019), Chapter 15:
RR = OR / (1 - br x (1 - OR)),
with br corresponding to the baseline risk (the assumed comparator risk; i.e., the risk that the outcome of interest would occur in the comparison intervention).
Value
A vector or matrix with risk ratios.
Author(s)
Bernardo Sousa-Pinto bernardo@med.up.pt, Guido Schwarzer guido.schwarzer@uniklinik-freiburg.de
References
Schunemann HJ, Vist GE, Higgins JPT, et al. (2019). “Interpreting results and drawing conclusions.” Cochrane Handbook for Systematic Reviews of Interventions, 403–431.
Examples
data(anticoagulation)
RRs <- or2rr(anticoagulation, br = 0.5)
head(RRs)