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

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: bnorth@imperial.ac.uk<mailto:bnorth@imperial.ac.uk>
Web:  www.ic.ac.uk/stathelp<http://www.ic.ac.uk/stathelp>


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