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st: Stratified cox regression: How many indivduals contribute to the analysis
From
Grethe Søndergaard <[email protected]>
To
[email protected]
Subject
st: Stratified cox regression: How many indivduals contribute to the analysis
Date
Thu, 7 Apr 2011 15:00:45 +0200
Hi,
I am analysing my data using a stratified cox regression model. I use
a sibling statum variable, taking the same value for individuals who
are full siblings. The individuals in the data set have between 1 and
5 full siblings.
(Variables in the data set):
Person_ID
Father_ID
Mother_ID
Exposure
Outcome
Number_of_siblings
...
Only siblings who discordant on exposure and where at least one of
them experiences the outcome contribute to the analysis. Is there a
way to find out how many of the siblings in my data that contribute –
e.g. by using “expand”?
Thank you
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