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st: intracluster correlation coefficient after Cox regression
From
"Elmir Omerovic" <[email protected]>
To
<[email protected]>
Subject
st: intracluster correlation coefficient after Cox regression
Date
Fri, 18 Oct 2013 23:45:31 +0200
Dear all,
I am a cardiologist with interest in statistics and stata. I am working with
a large hierarchical database (~700 000 observations) and we are interested
in different question in regard to prediction of patients outcome e.g.
survival.
I would be very grateful if someone could help me with the following
question. How to calculate ICC (i.e. intracluster correlation coefficient)
for a particular set of data. I have try to google this but was unable to
find something appropriate (that I can understand properly). Perhaps I have
misunderstood the concept. If we model the survival with e.g. shared frailty
Cox-regression (with hospitals as clusters) how do I calculate ICC from the
model?
Thank you!
Elmir Omerovic MD, PhD
Sahlgrenska University Hospital
Gothenburg, Sweden
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