Dear Donald,
Thank you very much for the explanation. I have found much trouble in
modeling my data, and you are already helping a lot!
I believe the "medication problem" is very hard to solve, but perhaps one
or two models can be useful although reliant on a few more premisses.
Without them, it
Pedro,
Instead of saying that you want to include the covariate in the analysis,
it's better to consider why you want to include the covariate and how it
changes the interpretation. You don't necessarily want to regress out
covariates, especially when the covariate is different between groups.
Dear list,
I am running a command line group analysis, and I want to include a
covariate that is zero for all subjects in a group, and diverse for all
subjects in the second group (medication intake, which is null for all
subjects in the control group).
This generates a lack of range of that
