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Re: st: RE: Power calculation for competing risks regression
From
Christoph Engel <[email protected]>
To
[email protected]
Subject
Re: st: RE: Power calculation for competing risks regression
Date
Mon, 22 Aug 2011 18:19:29 +0200
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
[email protected]
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--
_________________________________________________________________
Prof. Dr. Christoph Engel
Max-Planck-Institut zur
Erforschung von Gemeinschaftsgütern
Max Planck Institute for Research on Collective Goods
Kurt-Schumacher-Strasse 10
D 53113 Bonn
Tel. +49/228/91416-10
Fax +49/228/91416-11
e-mail: [email protected]
http://www.coll.mpg.de
http://www.coll.mpg.de/engel.html
http://ideas.repec.org/e/pen22.html
http://papers.ssrn.com/sol3/cf_dev/AbsByAuth.cfm?per_id=251559
_________________________________________________________________
*
* For searches and help try:
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* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/