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Re: st: Internal model validation

From   Maarten buis <>
Subject   Re: st: Internal model validation
Date   Thu, 1 Apr 2010 08:46:03 -0700 (PDT)

--- Eduardo Nunez asked:
> I wonder if Stata (version 11) has a module to perform a Cox model
> internal validation (mainly Harrell's C-statistics) using
> bootstrapping?

It is not pre-programmed, but it is not difficult to do in
Stata. You can compute Harrel's C using -estat concordance-, 
see: -help stcox postestimation##estatcon-. You can do the 
bootstrap validation as in:

Hope this helps,

Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen


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