metaan swMATH ID: 37491 Software Authors: Evangelos Kontopantelis; David Reeves Description: Pairwise meta-analysis of aggregate data using metaan in Stata. A few years ago, we developed metaan, a package to perform fixed- or random-effects meta-analysis. In terms of random-effects meta-analysis, it offered a wide choice of models, including maximum likelihood, profile likelihood, or restricted maximum-likelihood, in addition to the established DerSimonian–Laird method available in metan or Cochrane’s RevMan software. Other unique features included a wide range of reported heterogeneity measures and a plot of the maximum likelihood function. Since then, metaan has been continuously updated to offer improved graphics, more options, and more meta-analysis models. In this necessary update, we describe these additions and discuss the new models and the evidence behind them. Homepage: https://journals.sagepub.com/doi/pdf/10.1177/1536867X20953575 Dependencies: Stata Keywords: Stata Journal; Stata; st0201 1; metaan; meta-analysis; random effects; fixed effect; effect sizes; DerSimonian-Laird; maximum likelihood; profile likelihood; restricted maximum likelihood; Peto; Mantel-Haenszel; permutation(s) method; bootstrap DerSimonian-Laird; proportions; forest plot Related Software: SAS; metan; metaeff; MetaEasy; RevMan; R; meta; metafor; Stata Cited in: 0 Publications Standard Articles 1 Publication describing the Software Year