cap log close
clear
log using StataLog, replace 

include "http://192.38.117.59/~linearpredictors/datafiles/readPbc3.do"

/*
Declare data to be survival data
*/

stset followup, failure(status == 1 2)

/*
Kaplan Meier survival curves
*/
  
sts, by(tment) /*
*/   ytitle(Survival) xtitle(Follow-up time) /*
*/   xlabel(0(1)6) ylabel(0(0.2)1) lpattern("l" "-")

log close