Programming the statistical procedures from SAS

Proc Lifetest vs Proc phreg

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Super Contributor
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Proc Lifetest vs Proc phreg

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

 

Thank you.

SAS Super FREQ
Posts: 3,551

Re: Proc Lifetest vs Proc phreg

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.

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