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Re: st: graph piecewise constant baseline hazard

From   Maarten buis <>
Subject   Re: st: graph piecewise constant baseline hazard
Date   Mon, 17 Mar 2008 12:40:09 +0000 (GMT)

--- Chiara Mussida <> wrote:
> does somebody know how to graph a piecewise constant baseline hazard?

See (Cleves et al. 2004, pp. 215-222) and the example below:

*------------ begin example -------------------
sysuse cancer, clear
sum age
replace age = age-r(mean)
gen id = _n
stset studytime, failure(died) id(id)
stsplit time, at(5 10 20)
xi: streg i.time i.drug age, dist(exp)
adjust _Idrug_2=0 _Idrug_3=0 age=0, gen(xb)
gen haz = exp(xb)

twoway line haz time, c(J) sort
*---------- end example -----------------------

Mario Cleves, William W. Gould, and Roberto G. Gutierrez (2004) "An
Introduction to Survival Analysis Using Stata", College Station: Stata

Hope this helps,

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

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