# METAN: Stata module for fixed and random effects meta-analysis

*Ross Harris* (),
*Mike Bradburn*,
*Jon Deeks*,
*Roger Harbord*,
*Doug Altman*,
*Thomas Steichen* () and
*Jonathan Sterne*

Additional contact information

Ross Harris: Department of Social Medicine, University of Bristol

Mike Bradburn: Centre for Statistics in Medicine, University of Oxford

Jon Deeks: Centre for Statistics in Medicine, University of Oxford

Doug Altman: Centre for Statistics in Medicine, University of Oxford

Jonathan Sterne: Department of Social Medicine, University of Bristol

Statistical Software Components from Boston College Department of Economics

**Abstract:**
These routines provide facilities to conduct meta-analyses of data from more than one study and to graph the results. Either binary (event) or continuous data from two groups may be combined using the metan command. Additionally, intervention effect estimates with corresponding standard errors or confidence intervals may be meta-analysed. Recently added facilities include by() processing and an update to Stata 9 graphics. This is an updated version of metan as published in STB-44, authored by Michael J Bradburn, Jonathan J Deeks, Douglas G Altman. The package includes a command to produce funnel plots to assess small study effects, and L'Abbe plots to examine whether the assumption of a common odds ratio, risk ratio or risk difference is reasonable. Also included is the metannt program for binary data, which displays estimated intervention effects in terms of the absolute reduction in risk and number needed to treat. A description of available Stata meta-analysis commands may be found at http://www.stata.com/support/faqs/stat/meta.html.

**Language:** Stata

**Requires:** Stata version 9 (version 7 for metan7)

**Keywords:** meta-analysis; fixed effects; random effects; forest plot; l'Abbe plot (search for similar items in EconPapers)

**Date:** 2006-12-10, Revised 2010-09-23

**Note:** This module should be installed from within Stata by typing "ssc install metan". Windows users should not attempt to download these files with a web browser.

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**Downloads:** (external link)

http://fmwww.bc.edu/repec/bocode/m/metan.ado program code (text/plain)

http://fmwww.bc.edu/repec/bocode/m/metan.hlp help file (text/plain)

http://fmwww.bc.edu/repec/bocode/l/labbe.ado program code (text/plain)

http://fmwww.bc.edu/repec/bocode/l/labbe.hlp help file (text/plain)

http://fmwww.bc.edu/repec/bocode/l/labbe.dlg dialog file (text/plain)

http://fmwww.bc.edu/repec/bocode/m/metan7.ado program code (text/plain)

http://fmwww.bc.edu/repec/bocode/m/metan7.hlp help file (text/plain)

http://fmwww.bc.edu/repec/bocode/m/metan7.dlg dialog file (text/plain)

http://fmwww.bc.edu/repec/bocode/m/metannt.ado program code (text/plain)

http://fmwww.bc.edu/repec/bocode/m/metannt.hlp help file (text/plain)

http://fmwww.bc.edu/repec/bocode/m/metannt.dlg dialog file (text/plain)

http://fmwww.bc.edu/repec/bocode/i/i2ci.ado program code (text/plain)

http://fmwww.bc.edu/repec/bocode/m/metan_examples.ado sample do-file (text/plain)

http://fmwww.bc.edu/repec/bocode/m/metan_example_data.dta sample data file (application/x-stata)

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