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st: -metan- doesn't seem to do the Welch F-test

From   Roger Newson <>
To   "" <>
Subject   st: -metan- doesn't seem to do the Welch F-test
Date   Mon, 11 Apr 2011 12:24:50 +0100

I have a query re the -metan- command. When meta-analysing statistics from continuous data (eg arithmetic mean differences and geometric mean ratios), it seems to be using a chi-squared heterogeneity test, instead of the Welch heterogeneity F-test, which was recommended in the seminal paper by Cochrane (1954) for the case of continuous data. Is there a reason for this?

Best wishes (and thanks in advance)



Cochrane, W. G. 1954. The combination of estimates from different experiments. Biometrics 10(1): 101-129.

Roger B Newson BSc MSc DPhil
Lecturer in Medical Statistics
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute
Imperial College London
Royal Brompton Campus
Room 33, Emmanuel Kaye Building
1B Manresa Road
London SW3 6LR
Tel: +44 (0)20 7352 8121 ext 3381
Fax: +44 (0)20 7351 8322
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