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.
Kieran
-----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.
Regards,
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
www.fsp.usp.br/~jmpsouza
[email protected]
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