Re: st: RE: Power calculation for competing risks regression

[Christoph Engel <engel@coll.mpg.de>]

Dear David,

Hoping that this does not violate the Stata list etiquette: Here is the 
link to a free, very powerful power calculator, which a German colleague 
of mine has programmed. Maybet that helps.
http://www.psycho.uni-duesseldorf.de/aap/projects/gpower/

Best

Christoph




Am 8/22/2011 5:29 PM, schrieb Hackney, David:
> Hello all,
>
> Does anyone have advice on power (or sample size) calculations for competing risks (stcrreg) in Stata? We did a competing risks regression and found that the HR for the variable of interest was non-significant and the reviewers (reasonably) asked for a post-hoc power analysis to provide support for our conclusion. There is no competing risk model specific power calculation which appears to be available, though I didn't know if one of the other power commands could be modified to accommodate competing events, or if a user-written program existed (I couldn't find one with the search function). Thanks.
>
> David Hackney
>
>
>
> PS.  My apologies if I have sent this multiple times, I'm just not sure if I have done it correctly.  Thanks.
>
>
> David N Hackney MD, MS
> Assistant Professor
> Division of Maternal-Fetal Medicine
> Department of Obstetrics and Gynecology
> University of Rochester Medical Center
> Phone (admin assistant): 585-275-7480
> Fax: 585-256-1416
> david_hackney@URMC.rochester.edu
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
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> *   http://www.ats.ucla.edu/stat/stata/

--
_________________________________________________________________
Prof. Dr. Christoph Engel
Max-Planck-Institut zur
Erforschung von Gemeinschaftsgütern
Max Planck Institute for Research on Collective Goods
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D 53113 Bonn
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_________________________________________________________________

*
*   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/