Cumhaz plot in PROC PHREG

bollibompa — Thu, 08 Oct 2015 13:44:45 GMT

Hi,

I have a dataset with two groups (treatment=YES and treatment=NO) and time to failure

I am trying to create a cumhaz plot in PROC PHREG where treatment YES and NO are presented in two separate plots but in the same graph.

I have tried to use stratum/bystatum but I only get a compined hazard plot for both treatment groups.

Does anyone know what I am doing wrong? I post my code below

ODS graphics on;
proc phreg data = MY_DATA plots(overlay=stratum)=cumhaz;
model time*fail(0)=trt ps /rl ;
strata=trt;
run;
ODS graphics off;

Thanks in advance!

Thomas

Re: Cumhaz plot in PROC PHREG

Rick_SAS — Thu, 08 Oct 2015 14:00:52 GMT

I might be misunderstanding, but try OVERLAY=ROW:

proc phreg data=LBW plots(overlay=row)=cumhaz;
model Time*Low(0)= LWT Smoke HT UI / ties=discrete;
strata Age;
run;