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Re: st: logistic regression

From   "Sebastian F. Büchte" <>
Subject   Re: st: logistic regression
Date   Mon, 12 Mar 2007 11:25:45 +0100

Looking at your example data, your statement "only one variable (SNP)
is different in each person" appears to be inconsistent with the
presented data (check rows for id = 2).

I would help a lot to understand how your data is generated. Multiple
treatments/measurements for a number of subjects? Is this perhaps
panel data? ...


On 3/12/07, meena khan <> wrote:

I have a dataset where all variables are replicated twice for each subject,
only one variable (SNP) is different in each person:

ID          SNP     Event    X1         X2

1             0          0          a          a
1             1          0          a          a
2             1          1          b          b
2             1          1          b          b

I would like to know if it is correct to cluster by ID in a normal logistic
regression model? Conditional logistic regression does not work as when I
group it by ID as there is no variation within the groups. The logistic
cluster option seems correct to me when I read the Stata help – it adjusts
the SEs for intragroup correlation which is what I want. I just want to
check if it is right. Thanks


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