Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: C-statistic in Cox models with late entry
From
"Roger B. Newson" <[email protected]>
To
[email protected]
Subject
Re: st: C-statistic in Cox models with late entry
Date
Wed, 25 Sep 2013 11:32:37 +0100
A possible workaround to this problem is sketched in Section 5 of Newson
(2010). The solution is not perfect, but it is the best I have managed
so far.
Best wishes
Roger
References
Newson RB. Comparing the predictive power of survival models using
Harrell’s c or Somers’ D. The Stata Journal 2010; 10(3): 339–358.
Download from
http://www.stata-journal.com/article.html?article=st0198
Roger B Newson BSc MSc DPhil
Lecturer in Medical Statistics
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute
Imperial College London
Royal Brompton Campus
Room 33, Emmanuel Kaye Building
1B Manresa Road
London SW3 6LR
UNITED KINGDOM
Tel: +44 (0)20 7352 8121 ext 3381
Fax: +44 (0)20 7351 8322
Email: [email protected]
Web page: http://www.imperial.ac.uk/nhli/r.newson/
Departmental Web page:
http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/popgenetics/reph/
Opinions expressed are those of the author, not of the institution.
On 25/09/2013 05:21, Tasha Amin wrote:
This question was posted before in 2010 by someone else but remains unanswered.
Is there a way to obtain Harrell's C after -stcox- in a dataset that has late entry, i.e. left truncation?
I would like to compare C-statistics from various nested Cox models but when I type
-estat concordance- in Stata 12, I get the following message
"estat concordance may not be used with late entry or time-varying data"
The data has to remain -stset- as is, with late entry. Any help would be appreciated.
Thanks,
Tasha Amin
PhD Candidate (Epidemiology)
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/