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AW: st: RE: Backward or Forward selection of variables in cox regression


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   AW: st: RE: Backward or Forward selection of variables in cox regression
Date   Fri, 8 May 2009 13:49:19 +0200

<> 

http://www.stata.com/support/faqs/stat/stepwise.html



HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Deepa Aggarwal
Gesendet: Freitag, 8. Mai 2009 13:42
An: statalist@hsphsun2.harvard.edu
Betreff: Re: st: RE: Backward or Forward selection of variables in cox
regression

Nick,

Thanks for quick response. But why is it bad?

Deepa

On Thu, May 7, 2009 at 2:17 PM, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> The usual term is Cox regression.
>
> You can use -stepwise- with -stcox-. It's a very bad idea, but it is
> possible. See Frank Harrell, Regression modeling strategies, Springer,
> NY, 2001.
>
> Nick
> n.j.cox@durham.ac.uk
>
> Deepa Aggarwal
>
> I am using stcox command of Stata for the longitudinal analysis in time
> varying cox regression. Is there any command with which I can do
> backward
> or forward selection of variables in cox regression?
>
> *
> *   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/
>



-- 
Deepa

*
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*
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*   http://www.ats.ucla.edu/stat/stata/



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