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;
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