metafor: Meta-Analysis Package for R

The metafor package provides a comprehensive collection of functions for conducting meta-analyses in R. The package includes functions to calculate various effect sizes or outcome measures, fit 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 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 (conditional) 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.

Version: 1.9-5
Depends: R (≥ 3.0.0)
Imports: stats, utils, Matrix
Suggests: R.rsp, testthat, Formula, lme4, numDeriv, polycor, BiasedUrn, survival, Epi, minqa, multcomp, plyr, igraph, CompQuadForm, nloptr
Published: 2014-11-24
Author: Wolfgang Viechtbauer [aut, cre]
Maintainer: Wolfgang Viechtbauer <wvb at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: no
Citation: metafor citation info
Materials: NEWS
In views: ClinicalTrials, MetaAnalysis, Phylogenetics
CRAN checks: metafor results


Reference manual: metafor.pdf
Vignettes: Conducting Meta-Analyses in R with the metafor Package
Diagram of Functions in the metafor Package
Package source: metafor_1.9-5.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X Snow Leopard binaries: r-release: metafor_1.9-5.tgz, r-oldrel: metafor_1.9-4.tgz
OS X Mavericks binaries: r-release: metafor_1.9-5.tgz
Old sources: metafor archive

Reverse dependencies:

Reverse depends: MCPerm, metaplus, SAMURAI
Reverse imports: MAVIS, metagen, NSM3, RcmdrPlugin.MA
Reverse suggests: MAc, MAd, meta, mvmeta