Hi, I am trying to run a Proc gee for a multinomial distribution, with a repeated statement (each id has repeated measures over visits). This is the code that I am using: ; proc gee data=dataset; class id visit ygroup; model ygroup= x/dist=multinomial link=glogit; repeated subject=id/within=visit; run; The results state that "Logits modeled use '1' as the reference category.". However, looking at the Parameter Estimates for Response Model table, I am getting an intercept and estimates for groups 1 and 2 (as if it is using group '3' as the reference category). Any ideas of why this is happening and how to fix it? Also, I would like to use group '2' as a reference. Any ideas how to change that? Thanks!
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