10-30-2014 11:21 AM
I know this might sound an easy and new beginners questions however while i was working on multiple linear regression model i wanted to check the residuals and to create a graph for the same. During research I found both phreg and prog reg can be handy in doing so with some keywords added.
However I am a bit confused - what is the situation where i could use phreg and not proc reg and vice versa and both can be used.
10-30-2014 03:24 PM
A good time to read the introductory part of the SAS/STAT documentation.
I think of PHREG (proportional hazards regression) as a tool for survival analysis or censored data regression, while REG is a tool for linear regression with normal errors that has a lot of diagnostic tools for examining things like collinearity or influence.