R help - Feb 2008 - C-index

Hi

I am using Cox regression to identify at risk groups. How can I get the
C-index in R?

Thanks,

Bereket
<'r-help@stat.math.ethz.ch'>

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Hi

I am using Cox regression to identify at risk groups. How can I get the
C-index in R?

Thanks,

Bereket

	[[alternative HTML version deleted]]

bereket weldeslassie wrote:
> Hi
> 
> I am using Cox regression to identify at risk groups. How can I get the
> C-index in R?
> 
> Thanks,
> 
> Bereket
library(Hmisc)
?rcorr.cens
# assumes no overfitting

Also:

library(Design)
?validate
# penalizes for overfitting

Frank
> <'r-help at stat.math.ethz.ch'>
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 

-- 
Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University

I am using Cox regression to identify at risk groups. I have a training data
set and a validation data set. How can I get the C-index in R? Any hint is
highly appreciated.

Thanks,
Bereket

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