Hi all, SAS is completely new for me, and I would like to get intercepts and slopes for each participant on four repeated measures of depression. Time intervals vary among participants. Here is the program I use: proc mixed data=Depres covtest noclprint method=ml; class SubjID; model ??/ solution ddfm = SATTERTHWAITE; random intercept time/subject=SubjID type=vc; run; I don't know how to define my model. (At level 1(time), depression is equal to intercept,slope (time) and error). Moreover, in the dataset I use, should I have one participant per line and 4 different columns for the different measures of depression, or should I have only one column for depression and 4 lines per participant? Does anyone can help? That would be so great! Thanks in advance
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