ARD_from_RR {metaHelper} | R Documentation |
Absolute Risk Difference
Description
Calculates the Absolute Risk Difference (ARD) from a Risk Ratio and baseline risk using simulations. The result is ARD as a decimal. The number of replications is fixed at 100,000.
Usage
ARD_from_RR(BR, BRLL, BRUL, RR, RRLL, RRUL, seed = 1)
Arguments
BR |
baseline risk |
BRLL |
baseline risk lower limit confidence interval |
BRUL |
baseline risk upper limit confidence interval |
RR |
risk ratio |
RRLL |
risk ratio lower limit confidence interval |
RRUL |
risk ratio upper limit confidence interval |
seed |
seed that is used for the simulation to ensure reproducibility |
Value
Named numeric vector containing median ARD, the lower and upper CI of the ARD.
References
Murad M H, Wang Z, Zhu Y, Saadi S, Chu H, Lin L et al. Methods for deriving risk difference (absolute risk reduction) from a meta-analysis BMJ 2023; 381 :e073141 doi:10.1136/bmj-2022-073141
Examples
# Input : Baseline risk and 95% CI (BR BRLL and BRUL), risk ratio and 95% CI (RR, RRLL, RRUL)
BR <- 0.053; BRLL <- 0.039; BRUL <- 0.072
RR <- 0.77; RRLL <- 0.63; RRUL <- 0.94
ARD_from_RR(BR, BRLL, BRUL, RR, RRLL, RRUL)
[Package metaHelper version 1.0.0 Index]