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Re(2): st: How to draw a smoothed hazard curve with graph twoway


From   "Pyy-Martikainen Marjo" <Marjo.Pyy-Martikainen@stat.fi>
To   statalist@hsphsun2.harvard.edu
Subject   Re(2): st: How to draw a smoothed hazard curve with graph twoway
Date   3 May 2008 17:30:00 +0300

Thank you, Svend,

that was exactly what I wanted to do.

-Marjo


Svend Juul  (3.5.2008  16:39):
>Marjo Pyy-Martikainen wrote:
>
>how can I reproduce a smoothed hazard curve plotted by stcurve after a Cox ph
>model with graph twoway (my aim is to overlay two smoothed hazard curves based
on two different data sets so I think I need to use the graph twoway command at
least for one of the hazard curves)?. I cannot figure out how the smoothing
done by stcurve can be replicated with graph twoway.  Can someone please give
me a hint
>how to modify the code below?
>
>stcox <covariates>, basehc(h)
>stcurve, hazard width(1)
>graph twoway (line h _t, sort)
>
>==============================================================
>
>You can use -stcurve-s -outfile()- option. Illustration:
>
>      webuse drugtr.dta , clear
>      stcox age if drug==0 , basehc(h0)
>      stcurve , hazard width(1) outfile(drug0.dta, replace)
>      use drug0.dta , clear
>      rename haz1 haz0
>      save , replace
>
>      webuse drugtr.dta , clear
>      stcox age if drug==1 , basehc(h1)
>      stcurve , hazard width(1) outfile(drug1.dta, replace)
>      use drug1.dta , clear
>      append using drug0.dta
>
>      twoway (line haz0 haz1 _t, sort)
>
>Hope this helps
>Svend
>________________________________________________________
>
>Svend Juul
>Institut for Folkesundhed, Afdeling for Epidemiologi
>(Institute of Public Health, Department of Epidemiology)
>Vennelyst Boulevard 6
>DK-8000 Aarhus C,  Denmark
>Phone, work:   +45 8942 6090
>Phone, home:   +45 8693 7796
>Fax:           +45 8613 1580
>E-mail:        sj@soci.au.dk
>_________________________________________________________
>
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