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Re: st: Adjusted odds ratio
Good idea
Thanks
Claudia
From: Ron�n Conroy <[email protected]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: st: Adjusted odds ratio
Date: Tue, 12 Dec 2006 14:38:35 +0000
On 12 Noll 2006, at 09:51, Maarten buis wrote:
Easiest way is to divide X by it's standard deviation, so a unit change
in the new X variable is a standard deviation change. I find that
spending some extra time to make sure that a unit change in each
variable is meaningfull to me, is usually time well spent. In your case
you apperently prefer a standard deviation, I ususally like the range
of the variable, for instance I am often comparing persons with the
lowest socioeconomic status with people with the highest socioeconomic
status, which I find easier to talk about then standard deviations.
Can I add another option here? � Quantiles.
I often deal with measures that are on arbitrary scales, such as stigma,
depression, worry and assumptive world. Even scales with the same apparent
numeric range have very different distributions. For this reason, I often
use anything from quartiles to deciles. This makes it possible to compare
regression coefficients (relative risks, odds ratios etc) between
different measures.
I don't like using the standard deviation because my readers, like
everyone else who passed through elementary statistics classes on the way
to something more interesting, don't understand it.
=========
Ron�n Conroy
Royal College of Surgeons in Ireland
[email protected]
+353 (0) 1 402 2431
+353 (0) 87 799 97 95
http://www.flickr.com/photos/ronanconroy
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