topic Re: PROC LIFETEST - suppress warning in SAS Procedures

PROC LIFETEST - suppress warning

rcantor — Tue, 09 Aug 2016 19:55:12 GMT

Does anyone know how to suppress the following warning from proc lifetest?

"WARNING: The likelihood ratio test for strata homogeneity is questionable since some strata have
no events."

thanks!

Re: PROC LIFETEST - suppress warning

ballardw — Tue, 09 Aug 2016 20:03:22 GMT

Best would be to ensure that all of the strata have events.

Why do you want to disable a warning that you may be using an inappropriate method for the given data?

Re: PROC LIFETEST - suppress warning

rcantor — Tue, 09 Aug 2016 20:07:52 GMT

I agree not ideal. I am making a number of reports in an automated process. In the long runI could make the lifetest code conditional on how many strata and if they have events, but in the short term I'm trying to get my code to run without any warnings.

Re: PROC LIFETEST - suppress warning

Ksharp — Wed, 10 Aug 2016 01:44:45 GMT

Remove that Strata which have no event .

Re: PROC LIFETEST - suppress warning

SteveDenham — Mon, 15 Aug 2016 17:03:55 GMT

A WHERE clause would probably handle this.

Steve Denham

Re: PROC LIFETEST - suppress warning

fengyuwuzu — Thu, 20 Jun 2019 15:15:26 GMT

what if the strata is treatment arm?

Re: PROC LIFETEST - suppress warning

GavinZhou — Sun, 04 Feb 2024 04:25:02 GMT

If the specification you received request summary statistics for time-to-even data such as median survival
time, confidence intervals, and 25th – 75th percentiles, you still need to use the LIFETEST procedure and
you can use the NOTEST option to skip the inappropriate statistical test. For example, the following
codes will not issue the warning message because it does not perform the inappropriate statistical test,
but it will still give you the summary statistics.

ods output Quartiles=quartiles;
proc lifetest data=adtte method=KM alpha=0.05;
by subgroup;
time AVAL*CNSR(1);
strata trt01pn/notest;
run;