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Re: st: Abnormal logistic results

From   Ras Dondo <>
To   "" <>
Subject   Re: st: Abnormal logistic results
Date   Tue, 16 Oct 2012 15:31:40 -0700 (PDT)

Thanks Maarten for the advice.

----- Original Message -----
From: Maarten Buis <>
Sent: Tuesday, October 16, 2012 12:22 PM
Subject: Re: st: Abnormal logistic results

On Tue, Oct 16, 2012 at 12:42 PM, Ras Dondo  wrote:
> Thanks Maarten. But will it make any difference if instead of comparing those exposed and those not exposed to drug X, I decided to compare those with the disease to those without the disease in an attempt to determine the odds of exposure to the drug?

No, because that would still involve a comparison of exposed and
non-exposed. If you want to that route, you'll have to make sure that
exposure is in no way part of your model, but I guess that exposure is
the key variable for your analysis so that is not useful. I guess the
only thing you can do with the data you have is report the raw odds
ratio, without adjusting for anything.

Hope this helps,

Maarten L. Buis
Reichpietschufer 50
10785 Berlin
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