topic LSMEANS in Logistic vs Genmod in New SAS User

LSMEANS in Logistic vs Genmod

tka726 — Wed, 11 Mar 2020 01:34:09 GMT

Hello!

I am trying to calculate adjusted proportions for a binary outcome by quintile. I'm wondering why I get different results from LSMEANS in GENMOD & LOGISTIC. Both models are using the same reference groups (last quintile and non-male; age is continuous). If I remove the confounding variables (male and age) then the means from LSMEANS are the same. What am I missing here??

PROC GENMOD DATA=origs DESCENDING;
class quint;
model MI = quint male age;
lsmeans quint;
run;

PROC LOGISTIC DATA=origs descending;
CLASS quint / param=glm;
model MI= quint male age;
lsmeans quint / e ilink ;
run;

Re: LSMEANS in Logistic vs Genmod

PaigeMiller — Wed, 11 Mar 2020 10:19:00 GMT

Oh come on, show us the output.

Re: LSMEANS in Logistic vs Genmod

tka726 — Wed, 11 Mar 2020 16:54:35 GMT

Sorry, I didn't realize that the output didn't attach.

The results for 'Estimate' in the least square means output section of Genmod are not the same as the 'Mean' in the least square means output of Logistic.

Re: LSMEANS in Logistic vs Genmod

PaigeMiller — Wed, 11 Mar 2020 17:28:55 GMT

Sorry, but we probably ought to see screen captures of the output, pasted right into your reply. Most of us will not download Microsoft Office documents as they are a security threat.

Is it possible the LSMEANS are different because you use ILINK in one procedure but not the other?