I want to fit a model below, where edu is a 3-level variable, cou is a binary variable:
proc genmod data=cohort descending;
class id edu (ref='1');
model cou=edu female / dist=poisson link=log;
repeated subject=id/type=ind;
estimate 'edu 2 vs. edu 1' edu 0 1 0;
estimate 'edu 3 vs. edu 1' edu 0 0 1;
ods output Estimates=outtab;
run;
But the results viewer showed "Non-est" in the contrast estimate results table. I found people always refer to this note (https://support.sas.com/kb/24/447.html) for relevant questions, but I felt so lost after reading this.
I just want to know:
edu 3 vs. edu 1, RR=....95%CI=...
edu 2vs. edu 1, RR=....95%CI=...
Use the LSMEANS command in PROC GENMOD, with the DIFF and CL options. https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.4/statug/statug_genmod_syntax20.htm
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