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, <[email protected]> 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
>
>
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
--
Sripal Bangalore, MD, MHA
St. Lukes Roosevelt Hospital,
Columbia University College of Physicians and Surgeons,
New York, NY
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
