Using Stata 15, I am fitting a longitudinal GEE model with a binary main predictor and two binary candidate effect modifiers so that the model is parameterized with these three variables and two interaction terms crossing the main predictor with each of the candidate effect modifiers. I am interested in obtaining odds ratios and 95% confidence intervals for the main predictor at each of the four combinations of possible values for the two candidate effect modifiers. In SAS, the statistical software I use most, there is an ODDSRATIO statement that will calculate these results. For instance, it will report for “Predictor 1 vs 0 at modifier_1 = 1 and modifier_2 = 1” that the odds ratio is this and the 95% confidence intervals are that.
How do I obtain such interaction term results for this model from Stata software when using the xtgee statement? I thank respondents in advance for any assistance they might provide.”
How do I obtain such interaction term results for this model from Stata software when using the xtgee statement? I thank respondents in advance for any assistance they might provide.”
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