[R] C-index

[Frank E Harrell Jr]

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

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