Hi everyone,

I have one outcome variable (A), many predictor variables (X,Y,Z,..) and three groups (clinical groups I, clinical group II, and one control group). I would like to see if there are differences in predictors of A between groups (at least between the two clinical groups).

I was thinking fist to do a standard regression separately for each group (if I have big enough sample for each group), then probably to use the predictors that are in common and run another regression analyses for the whole group. And then use group as a dummy variable or use a moderation analysis with multiple regressions with interactions? But I am not sure if this will give me what I am looking for. Does anyone have any idea if and how can I do that?

Many Thanks,

Valia

I have one outcome variable (A), many predictor variables (X,Y,Z,..) and three groups (clinical groups I, clinical group II, and one control group). I would like to see if there are differences in predictors of A between groups (at least between the two clinical groups).

I was thinking fist to do a standard regression separately for each group (if I have big enough sample for each group), then probably to use the predictors that are in common and run another regression analyses for the whole group. And then use group as a dummy variable or use a moderation analysis with multiple regressions with interactions? But I am not sure if this will give me what I am looking for. Does anyone have any idea if and how can I do that?

Many Thanks,

Valia

Last edited: