Proc Lifetest vs Proc phreg

[Babloo]

Appreciate if someone helps me to understand the difference between Proc Lifetest vs Proc Phreg.

Thank you.

[Rick_SAS]

I recommend the section "Introduction to Survival Analysis Procedures" in the SAS/STAT documentation. It describes both procedures and compares them.  

Briefly, LIFETEST provides a nonparametric estimate of the survival times. PHREG fits a (semi)parametric Cox model. In the Cox model you get parameter estimates that you can use to interpret the strength and significane of effects.