Re: st: stcox: negative HR when used in bootstrap

[Michael McCulloch <mm@pinest.org>]

Works just fine!
Thank you kindly.
Michael

> bootstrap, reps(100): boot_hr
>
> should be
>
> bootstrap drug=r(drug), reps(100): boot_hr
>
> Hope this helps,
> Maarten
>
> --- Michael McCulloch <mm@pinest.org> wrote:
>
> >  Hello,
> >  I'm puzzling over why the same stcox argument would return a negative
> >
> >  HR value when bootstrapped. Any comments or critique would be
> >  welcomed!
> >
> >  *--------------- begin code in question -----------------------
> >
> >  sysuse cancer, clear
> >  stset studytim, failure(died)
> >  stcox drug
> >
> >  sysuse cancer, clear
> >  stset studytim, failure(died)
> >  capture program drop boot_hr
> > 	program define boot_hr, rclass
> >
> > 	* cox
> > 	stcox drug
> > 	indeplist, local
> > 	foreach var of varlist `X' {
> > 		return scalar `var' = exp(_b[`var'])
> > 	}
> >
> >  end
> >  set seed 12358
> >  bootstrap, reps(100): boot_hr
> >  *--------------- end code in question -----------------------
> >
> >  --
> >
> >  Michael McCulloch
> >  Pine Street Foundation
> >  124 Pine St., San Anselmo, CA 94960-2674
> >  Tel:	(415) 407-1357
> >  Fax:	(415) 485-1065
> >  mcculloch@pinestreetfoundation.org
> >  *
> >  *   For searches and help try:
> >  *   http://www.stata.com/support/faqs/res/findit.html
> >  *   http://www.stata.com/support/statalist/faq
> >  *   http://www.ats.ucla.edu/stat/stata/
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
> visiting address:
> Buitenveldertselaan 3 (Metropolitan), room Z434
>
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
>
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*
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