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Re: st: AW: difference in odds ratio


From   raoul reulen <r.c.reulen@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: AW: difference in odds ratio
Date   Tue, 2 Mar 2010 17:33:49 +0000

Hi Ali

Why not just run one model and fit an interaction term?

On 2 March 2010 10:42, Martin Weiss <martin.weiss1@gmx.de> wrote:
>
> <>
>
>
>
> *************
> h suest
> *************
>
>
>
> HTH
> Martin
>
>
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Shehzad Ali
> Gesendet: Dienstag, 2. März 2010 11:32
> An: Stata List
> Betreff: st: difference in odds ratio
>
> Hi listers,
>
> I have run two separate logistic regression models for two age groups
> (dependent and independent variables are the same in the two regressions). I
> want to find out whether the odds ratios for the two groups are
> statistically significantly different from each other, i.e. I am interested
> in OR(A) - OR(B) and the confidence interval around the difference.
>
> Could anyone suggest the best way to get the confidence interval and p-value
> of the difference in odds ratios?
>
> Many thanks,
> Shehzad
>
>
>
>
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-- 
-------------------------------------------------------
Raoul C. Reulen
Cancer Research UK Training Fellow

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