How do you pool effect estimates (RR) in a meta-analysis?

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Aedrian Abrilla

If by RR you mean relative risk or risk ratio, this can be performed easily in RevMan (https://training.cochrane.org/online-learning/core-software-cochrane-reviews/revman/revman-5-download) or in any other meta-analysis software/tool since RR is a typical effect size measurement for cohort studies and clinical trials.

James Leigh

use inverse variance weighted mean of study regression coeffcients.

ie mean b (over all studies) = sigma (wb) / sigma w, . where w = 1/SE2

Bastiaan Van Grootven

Dear Mohamed,

There are some important considerations when you use the RR in a meta-analysis: https://pubmed.ncbi.nlm.nih.gov/33171273/ You may want to use the OR.