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st: AW: RE: Harrell's C statistics after Bootstrap


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: AW: RE: Harrell's C statistics after Bootstrap
Date   Thu, 26 Mar 2009 13:55:23 +0100

<> 

Maarten also provided good advice a couple of days ago:
http://www.stata.com/statalist/archive/2009-03/msg01309.html

Has anything changed since then?

HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Hari Nathan
Gesendet: Donnerstag, 26. März 2009 13:53
An: statalist@hsphsun2.harvard.edu
Betreff: st: RE: Harrell's C statistics after Bootstrap

Can you clarify your question?  Are you trying to calculate a
bootstrap-corrected c-statistic (i.e., one that corrects for model optimism
using bootstrapped data)?  If so, I have a user-written program that will do
it for you.

Hari Nathan
-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Max Bulsara
Sent: Wednesday, March 25, 2009 8:43 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: Harrell's C statistics after Bootstrap

Is there a way of obtaining  Harrell's C concordance statistics after
each Bootstrap replication of stcox? I am using Stata V10

Thanks
Max

Dr Max K. Bulsara, PhD
Biostatistician,
(Adjunct Assoc Prof Curtin University
and University of Notre Dame),
UWA Centre for Child Health Research
Telethone Institute for Child Health
100 Roberts Road, Subiaco, WA6008
Tel: (08) 9489 7737
email: mbulsara@ichr.uwa.edu.au

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