On Aug 17, 2010, at 6:10 AM, North, Bernard V wrote:
Dear All,
Is it possible to get confidence intervals for Harrell's concordance
index or, equivalently, Somer's D using the rms package or in some
other way ?
I have survival data it would be the c-index in the Cox model setting
I believe that Frank has answered this question several times on the
list. Have you done a search of the r-help archives?
--
David.
Many thanks
Dr Bernard North
Statistical Consultant
Statistical Advisory Service
Advice and Courses on Research Design and Methodology
Imperial College South Kensington Campus
8 Princes Gardens Room 845, 4th Floor
London SW7 1NA.
Tel: 020 7594 2034
Fax: 020 7594 1489
Email: bno...@imperial.ac.uk<mailto:bno...@imperial.ac.uk>
Web: www.ic.ac.uk/stathelp<http://www.ic.ac.uk/stathelp>
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