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st: RE: zeros in metan

From   "Hopkins, John" <>
To   "''" <>
Subject   st: RE: zeros in metan
Date   Thu, 17 Oct 2002 12:16:32 -0400

METAN adds 0.5 to all cells of the 2x2 table before analysis.  The other
commands (META, METACUM, METAINF, METABIAS, METAREG) require summary
statistics to be calculated, and so the user must handle this issue

This is paraphrased from Egger, Smith, Altman (2001) "Systematic Reviews in
Health Care," an excellent text.

John Sloan Hopkins, Epidemiologist
Division of Epidemiology and Clinical Research
RTI Health Solutions
3040 Cornwallis Road
Research Triangle Park, NC 27709-2194
phone: (919) 541-7199

-----Original Message-----
From: Jodi Segal []
Sent: Thursday, October 17, 2002 11:58 AM
Subject: st: zeros in metan

How does stata handle zeros in the denominator for the metananalysis of
relative risks or odds ratios?
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