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Re: st: Rescaling odds ratios


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Rescaling odds ratios
Date   Thu, 22 May 2008 21:59:01 +0100 (BST)

--- BARTHRILEY@comcast.net wrote:
> I am performing a logistic regression using xtlogit. Some of my
> predictors are measured in days of treatment. Is there a way to
> recalculate the OR for a different unit of days, i.e., 30 days of
> treatment? Or would I have to transform the variable (e.g., dividing
> the per day variable by 30)?

Rescaling the variable, or even better creating a new variable which is
the rescaled old variable, is by far the easiest way to achieve these
kind of things.

-- Maarten

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


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