Hi all,
I'm trying to stratify my survival curves however my output gives me three separate plots rather than overlaying them. I've seen the use of baseline/rowid but I can't seem to make that work. Also I cant use lifetest procedure because I'm using a continuous variable anyone ahs suggestions they would be much appreciated, my current code is below:
ods graphics on;
proc phreg data=merged11 plot(overlay=stratum)=(survival);
where rs>34;
class chemoYN (param=ref ref='N');
model dx_lastcontact_death_months * Puf_Vital_status(1) = chemoYN |absBenefitTAM1;
hazardratio chemoyn / at(absBenefitTAM1= (5 10 15 20 25 30)) units=5;
strata T1b1c;
run;
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