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st: RE: Statistical/Stata question

From   Kieran McCaul <[email protected]>
To   "'[email protected]'" <[email protected]>
Subject   st: RE: Statistical/Stata question
Date   Wed, 18 Feb 2004 09:52:15 +0800

You will have essentially combined categories 1 and 2.  So your ORs for
categories 3 and 4 will be relative to 1 and 2 combined.


-----Original Message-----
From: Jose Maria [mailto:[email protected]]
Sent: Wednesday, 18 February 2004 9:26 AM
To: [email protected]
Subject: st: Statistical/Stata question

Dear Statalisters:
I think it is more of a statistical question, but may I ask it:
If I have a categorical variable  (let�s say with 4 categories) and run
the logistic regression _logistic depvar category2 category3 category4_,
I get the odds ratios relating each of the 2,3,4 categories  against the
category1 reference, with straigthway interpretation. What is the
interpretation if I do _logistic depvar category3 category4_?
Sorry if it is a silly question.
Jose Maria

Jose Maria Pacheco de Souza, Professor Titular
Departamento de Epidemiologia
Faculdade de Saude Publica/Universidade de Sao Paulo
Av. Dr. Arnaldo, 715	cep 01246-904
Sao Paulo	Brasil
fones (11)3082-3886  (11)3714-2403  (11)3768-8612
fax   (11)3082-2920  (11)3714-2403
[email protected]

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