Programming the statistical procedures from SAS

odds ratio estimates for interaction terms with GLIMMIX

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AMF
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odds ratio estimates for interaction terms with GLIMMIX

Hello,

I was wondering how to obtain OR estimates and confidence intervals for a fixed effects model I am fitting with GLIMMIX (GLM with logit link)- so basically a logistic regression.

I am able to obtain predicted probabilities at each level of the interaction with the lsmeans statement:

lsmeans var_a*var_b/ilink cl, and realize that I can probably exponentiate the parameter estimates for each interaction term to obtain odds ratios (provided I've set my referent group for both var a and var b), but the confidence intervals are tricky. Can I use a command or option in the lsmeans statement to automate this and make it easier?

Thanks!

Respected Advisor
Posts: 2,655

Re: odds ratio estimates for interaction terms with GLIMMIX

The LSMEANS options DIFF, OR and CL will give you the odds ratios with confidence limits.  It is harder for interactions, but I suppose that by using the SLICEDIFF option you can narrow this to the odds ratios of interest.

Steve Denham

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