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.
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