Date:         Sun, 15 Aug 2010 07:54:46 -0400
Reply-To:     MichaeL Kruge <aa3657@wayne.edu>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         MichaeL Kruge <aa3657@wayne.edu>
Subject:      Re: logistic regression interaction
Comments: To: R B <ryan.andrew.black@gmail.com>
In-Reply-To:  <AANLkTimB6tVGBtG7O_eLZF-GSiGh8cfZ+iLggbx0WXGL@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Ryan's approach is excellent in tehms of understanding the model and
process. If you are just looking to get the values for the unlisted
categories, the easieest way is to just switch reference categories.
If you are using default indicator coding then the last category is the
reference and it has an OR=1.0. If you specify the first category as the
reference you will get an OR for the last category in the output
the is the OR for the last category relative to the first. If you are
using deviation contrasts, then the missing category OR is obtained by
merely changing the reference from the defualt to first. This can be
doen with menus. If you would like a category other than first or last
to be used in any type of contrast coding, use syntax and change it the
the desired referecne category level and rerun fro mthe syntax window.

MK

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