Meta-Analysis Package for R R package metafor version 5.0-1 CRAN Task View: ClinicalTrials (https://CRAN.R-project.org/view=ClinicalTrials) CRAN Task View: MetaAnalysis (https://CRAN.R-project.org/view=MetaAnalysis) CRAN Task View: Phylogenetics (https://CRAN.R-project.org/view=Phylogenetics) A comprehensive collection of functions for conducting meta-analyses in R. The package includes functions to calculate various effect sizes or outcome measures, fit equal-, fixed-, random-, and mixed-effects models to such data, carry out moderator and meta-regression analyses, and create various types of meta-analytical plots (e.g., forest, funnel, radial, L'Abbe, Baujat, bubble, and GOSH plots). For meta-analyses of binomial and person-time data, the package also provides functions that implement specialized methods, including the Mantel-Haenszel method, Peto's method, and a variety of suitable generalized linear (mixed-effects) models (i.e., mixed-effects logistic and Poisson regression models). Finally, the package provides functionality for fitting meta-analytic multivariate/multilevel models that account for non-independent sampling errors and/or true effects (e.g., due to the inclusion of multiple treatment studies, multiple endpoints, or other forms of clustering). Network meta-analyses and meta-analyses accounting for known correlation structures (e.g., due to phylogenetic relatedness) can also be conducted. An introduction to the package can be found in Viechtbauer (2010) <doi:10.18637/jss.v036.i03>. Software Depends: R (>= 4.0.0), methods, Matrix, metadat, numDeriv Imports: stats, utils, graphics, grDevices, nlme, mathjaxr, pbapply, digest Suggests: lme4, pracma, minqa, nloptr, dfoptim, ucminf, lbfgsb3c, subplex, BB, Rsolnp, alabama, optimParallel, optimx, CompQuadForm, mvtnorm, BiasedUrn, Epi, survival, GLMMadaptive, glmmTMB, car, multcomp, gsl, sp, ape, boot, clubSandwich, crayon, R.rsp, testthat, rmarkdown, wildmeta, emmeans, estmeansd, metaBLUE, rstudioapi, glmulti, MuMIn, mice, Amelia, calculus Wolfgang Viechtbauer <wvb@metafor-project.org> Comprehensive R Archive Network (CRAN) Wolfgang Viechtbauer [aut, cre] (ORCID: <https://orcid.org/0000-0003-3463-4063>) GPL (>= 2) 2026-04-26 application/tgz https://CRAN.R-project.org/package=metafor doi:10.32614/CRAN.package.metafor