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| From | "Sarah Tougher" <Sarah.Tougher@lshtm.ac.uk> |
| To | "Berthold Hoppe" <berthold.hoppe@charite.de>, <statalist@hsphsun2.harvard.edu> |
| Subject | Re: st: Meta-analysis, Breslow-Day test for non-binary variable (Out of office) |
| Date | Thu, 20 Oct 2011 13:35:47 +0100 |
I am out of the office until November 7th. I have intermittent access to email, but will try to return your message as soon as possible. >>> Berthold Hoppe <berthold.hoppe@charite.de> 10/20/11 13:35 >>> Dear Steve. The interaction term ******************** xi3: logit x i.y*z ******************** gives a P for the BD test. Thanks a lot, Berthold Am 19.10.2011 um 21:23 schrieb Steven Samuels: > > The BD Test is, in your case, a 2 d.f. of equal OR in the two cohorts; as such it is a test of the interaction between y and z in a logistic regression model. > > *********************************** > logistic x y##z, coeflegend > test 2.y#1.z 3.y#1.z > ************************************ > > Steve > > On Oct 19, 2011, at 8:09 AM, Berthold Hoppe wrote: > > Dear all. > > Using -mhodds x y, by(z)- I have analyzed the relation between -x- (0 or 1) and -y- (0 or 1 or 2) in two cohorts (-z-) to get pooled OR and M-H for homogeneity. > In a review process I am now asked to provide a P for homogeneity by Breslow-Day instead of Mantel-Haenszel testing. Does anyone know if and how this could be calculated by STATA? > As -y- is not binary -cc x y, by(z) bd- will not work. > I have tried to use -meta-, -metan- or -metacum- but a Breslow-Day test seem to be possible only if -y- is binary. > > Many thanks in advance, > Berthold > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/