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Re: st: t: Test for Interaction-Meta analysis program


From   "Sripal Kumar" <sripalkumar@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: t: Test for Interaction-Meta analysis program
Date   Sat, 22 Mar 2008 18:39:30 -0400

Thanks for the reply.  Is test for heterogeneity between subgroups the
same as test for interaction?

On Sat, Mar 22, 2008 at 5:50 PM,  <tiago.pereira@incor.usp.br> wrote:
> Sripal,
>
> You have several strata, say, N 2x2 tables (or effect sizes and their
> variances/standard errors), you can test for interaction (assuming that
> interaction in this case means lack of homogeneity) using either the
> Cochran Q-Statistic or the Breslow-Day test.
>
> -metan- calculates automatically the Q-statistic, whereas the Breslow-Day
> test requires the option breslow as well as raw data (complete 2x2
> tables).  Assuming you have raw data (2x2 tables) as a b c d (four
> collumns), type, for instance:
>
> metan a b c d, or random breslow
>
> or
>
> metan a b c d, rr fixedi
>
> see the several options you have on the help file.
>
> Tiago
>
>
> *
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>



-- 
Sripal Bangalore, MD, MHA
St. Lukes Roosevelt Hospital,
Columbia University College of Physicians and Surgeons,
New York, NY
*
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