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I have two possible exposure variables (A and B) for use in a statistical model predicting a binary health outcome. I have fitted models with each variable separately and now know that one variable is a better predictor of my outcome based on a comparison of R-squared and BIC values. However, the ORs for the two variables are quite similar with overlapping confidence intervals. The sample composition and size is the same for each model.

I would like to comment on whether the odds ratios are significantly different from one another. How can I do this?

Best Regards.

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1 Answer

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It looks like you are trying to compare two odds ratios. Try looking at

Statistical test for difference between two odds ratios?

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In this case the 2 ORs are not independent, I'd say. – andrea Oct 7 '12 at 20:03
Hi - yes I did see the earlier post, but as a novice I need something with bit more explanation! – N26 Oct 7 '12 at 20:51
As pointed out above, can you assume independence? – Ken Dunn Oct 7 '12 at 20:58
I'm not sure. How would I evaluate that? Exposure A and Exposure B are correlated to some extent, but rho is about 0.5. – N26 Oct 8 '12 at 9:12

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