Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: xi2 and i. vs s.


From   "Wendell Joice" <wjoice@erols.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: xi2 and i. vs s.
Date   Tue, 8 Apr 2003 10:45:43 -0400

Dear Statalist
Using Stata 7, I have been experimenting (aka trying to learn) with xi2
since conceptually it seems to help me with testing simple comparisons after
logistic regression.

I noted that if you run a statement like:
"xi2: logistic psycther i.race*i.region"   (race_1 and region_1 omitted:
reference)
the resulting odds ratios for race_2 , race_3 etc   will be different from
those obtained from
"xi2: logistic psycther s.race*s.region"  (race_1 and region_1 omitted:
reference)

Why is there a difference?



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index