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Re: st: Question about stcurve (resending)


From   adiallo5@worldbank.org
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Question about stcurve (resending)
Date   Tue, 1 Nov 2005 14:29:27 -0500

Xiao,
Unless I miss something, this sounds like:
qui streg x1 x2 x3, d(w)
predict surv1, surv
qui streg x1 x3, d(w)
predict surv2, surv
graph surv1 surv2 _t

Another way:
qui streg x1 x2 x3, d(w)
predict surv1, surv
replace x2 = 0
predict surv2, surv
graph surv1 surv2 _t

Amadou.

xiao yi <mgxiaoyi@yahoo.com> wrote:
Statalist,

I am doing a survival analysis by fittng a parametric
model. After streg x1 x2 x3, I would like to plot the
survival graphs and do a counterfactual analysis. For
example, if x2=0 (in my original data, x2 is a
continuous variable), what would the survival graph
look like. I think I can run a model by dropping x2
and then plot using stcurve. But how can I put the two
survival graphs together i.e. a specification with x2
and without x2? Thanks.

Xiaoyi

University of Oklahoma
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