Reverse categories in hazardratio statement

[pink_poodle]

I have following statements in PROC PHREG (please see below), the meaning does not matter. The purpose is so the output shows hazard ratio for, say, ost_q 2 vs. 1 (since '1' is the reference level), but instead the output from hazardratio statement shows ost_q 1 vs. 2. How to modify this code? Many thanks!

class ost_q (ref='1')/ PARAM = REF;
model  hosp*hosp_bin(0) = ost_q;
hazardratio ost_q /cl = wald ;

[FreelanceReinh · Accepted solution]

Hello @pink_poodle,

Add the DIFF=REF option to the HAZARDRATIO statement:

hazardratio ost_q /cl = wald diff=ref;

[pink_poodle]

Great, thank you! Happy Solar Eclipse!