PHREG

[LJB]

I am using SAS 9.1 and am testing the proportional hazards assumption required for the Cox model. This test requires the use of the phreg statement:

proc phreg data = alldata;
model time*cens(0)=sex;
sext=sex*time;
proportionality_test: test sext;
run;

However, whenever I run any code with this (and proc lifetime) statement I get an error message: ERROR: Procedure PHREG not found.

Please can someone tell me how I can install this and the other survival packages as they don't seem to be default on SAS?

Thank you,

LJB

[Doc_Duke]

PHREG is part of the SAS/Stat product. It is not installed on your SAS box. Either 1) it is not licensed (in which case you are SOL) or 2) it was not installed. Hope for 2). Call your local IT support. If they can't resolve it, you then go to SAS tech support. SAS tech support may want you to have the ORIGINAL CDs, so you may need to have your IT support people there with you when you call (at least our IT folks won't let mere users have their originals).