Hello,
I'm using sas 9.4 and am trying to make a Kaplan Meier curve. Below is my code. The error message that I get is that the variable Group is not found. However, I have the variable Group in output from a proc freq step just before running proc lifetest. It is a numeric variable 0, 1, 2 with a few missing. Why doesn't the strata step recognize my variable Group? Does the strata variable need to be character variable or some other specification to be recognized?
ods graphics on;
proc lifetest data=data plots=survival (cb=hw atrisk(outside(0.15)));
time survt * status(0);
strata Group / order=internal test=logrank;
run;
ods graphics off;
Best
Laura
Did you merge the results of your PROC FREQ statement into the DATA data set? To make sure the data set has the GROUP variable, run
proc contents data=data short varnum;
run;
and post the results.
Did you merge the results of your PROC FREQ statement into the DATA data set? To make sure the data set has the GROUP variable, run
proc contents data=data short varnum;
run;
and post the results.
Are you ready for the spotlight? We're accepting content ideas for SAS Innovate 2025 to be held May 6-9 in Orlando, FL. The call is open until September 25. Read more here about why you should contribute and what is in it for you!
Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.
Find more tutorials on the SAS Users YouTube channel.