st: twoway line graph after stcompet by group

[Florian Posch <florian.posch@meduniwien.ac.at>]

Dear Statalisters,

I'd kindly appreciate your help regarding an issue with a competing risk 
analysis:
I want to produce a graph showing the cumulative incidence functions for 
two groups using stcompet and twoway (accounting for death as a 
competing risk):

stset time_to_event, fail(outcome=1)
stcompet cuminc_xvar=ci, by(xvar) compet1(2)
separate cuminc_xvar if outcome==1, by(xvar) veryshortlabel
twoway ///
(line cuminc_xvar0 time_to_event, sort c(J)) ///
(line cuminc_xvar1 time_to_event, sort c(J))

Now my problem is that - when graphing the twoway plot - the cumulative 
incidence functions stop at the last event, but do not continue 
horizontally to the right of the graph (in parallel to the x-axis) as a 
stairstep function like in Kaplan-Meier normally does until the end of 
follow-up. If I produce the analogous graph using the Kaplan-Meier 
failure estimator followed by twoway line..., the curves continue nicely 
to the right until the end of follow-up (as expected).
Any suggestions how to fix the cumulative incidence functions so they 
look analogous to the KM failure functions?

Thx guys,

Florian Posch
Dept. of Hematology
Medical University of Vienna, Austria




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