Roger,
I am getting "option censtat() not allowed" message. Should it be
-cenind()-, maybe? Also, by -hazard- you mean subhazard ratio or cumulative
subhazard function?
Andrzej
On 9/11/09 5:40 PM, "Newson, Roger B" <[email protected]> wrote:
> I don't know why Harrell's c is not available afert parametric survival model.
> However, it is definitely available after the -somersd- command, downloadable
> from SSC. If in Stata you type
>
> somersd lifetime hazard, censtat(cstat) transf(c) tdist
>
> and -lifetime- is a lifetime variable, -hazard- is a predictor of hazard rate,
> and -cstat- is a censorship status variable (positive for right-censored
> lifetimes, negative for left-censored lifetimes and zero for uncensored
> lifetimes), then you will get an estimate for Harrell's c, which is stored in
> e(b).
>
> I hope this helps. Let me know if you have any further queries.
>
> Best wishes
>
> Roger
>
>
> 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/popgeneti
> cs/reph/
>
> Opinions expressed are those of the author, not of the institution.
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Andrzej Niemierko
> Sent: 11 September 2009 14:46
> To: Stata
> Subject: st: stcrreg and Harrell's c index
>
> Harrell's c index is not available as a postestimation statistic after
> stcrreg (or any parametric survival model). Is there a theoretical reason
> for this? If not, how can I compute it after stcrreg?
> Andrzej
>
>
>
>
>
>
> The information in this e-mail is intended only for the person to whom it is
> addressed. If you believe this e-mail was sent to you in error and the e-mail
> contains patient information, please contact the Partners Compliance HelpLine
> at
> http://www.partners.org/complianceline . If the e-mail was sent to you in
> error
> but does not contain patient information, please contact the sender and
> properly
> dispose of the e-mail.
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/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/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/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
