Date: Tue, 7 Jun 2005 15:35:23 -0700
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: "David L. Cassell" <cassell.david@EPAMAIL.EPA.GOV>
Subject: Re: multinomial logistic regression - with slight problems
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Kath Santos <flowerpotcat@GMAIL.COM> replied:
> A related question regarding your suggestions... Does Proc
> SurveyLogistic handle multinomial logistic regression for complex
> samples? I've tried to do it, SAS did give an output but I didn't know
> how to interpret it (it looks so much different from the catmod
> output). It seems it didn't take into consideration the different
> levels of the dependent variable... Since I don't know how to do
> multinomial logistic in the proc surveylogistic, i did my runs in
> stata instead.... but if any of you could let us know how to do it in
> sas i'd appreciate it so much.
 PROC SURVEYLOGISTIC does indeed handle multinomial logistic
regressions. Just specify the link function as GLOGIT.
 The output for generalized logits regression in PROC SURVEYLOGISTIC
is actually designed to look a lot like a similar analysis in PROC
LOGISTIC, rather than that in PROC CATMOD.
 If it works better for you in Stata, then go for it. You don't
have to stick with SAS if you're fluent in multiple programs.
 The easiest way to get a handle on the output of PROC SURVEYLOGISTIC
is to read the SAS Online Docs. Go to sas.com and track down the
online documentation for SAS 9.1 . Then read over the examples for
PROC SURVEYLOGISTIC in the SAS/STAT section, and you'll see. You
can also jump over to the examples for PROC LOGISTIC and see how
LINK=GLOGIT looks in that proc.
David Cassell, CSC
Senior computing specialist