Survival Analysis Using SAS®: A Practical Guide

Conclusion

PROC LIFETEST is a useful procedure for preliminary analysis of survival data and for testing simple hypotheses about differences in survival across groups. For experimental studies, PROC LIFETEST gives results that are analogous to a one-way analysis of variance. But the procedure is not adequate for two-factor designs because there is no way to test for interactions. Similarly, while the TEST statement in PROC LIFETEST may be useful for screening large numbers of quantitative covariates, it is not adequate for examining the effects of variables controlling for other covariates. In most cases, therefore, you will need to move to the estimation of regression models with PROC LIFEREG or PROC PHREG.

It is also important to recognize ...