Hi, I am doing a linear mixed effect model in SAS and I am getting very different results using S-plus. I have three variables: a subject ID, the log of the dose they received, and a log of a parameter I estimated for each subject.
In SAS I use this code:
proc mixed data=doses;
model cmax_log=dose_log/solution cl alpha=.1;
Random dose_log/subject=subjid solution ;