Ordinal Logistic Regression: how to compare variable levels

[gmm]

Hi, 

I am running an ordinal logistic regression. I have my ordinal variable (OHI) and my dependent variable (bone) has 3 levels- femur, ilium, and rib. Since the rib is the reference, I have results for the rib vs femur and rib vs ilium, but I need results for femur vs ilium. How do you code for this? Is a contrast statement appropriate? Here is the code I used to run the ordinal regression in SAS Studio.

proc logistic data=work.bioerosion descending;
class OHI bone;
model OHI=bone;
run;

[Reeza]

Depends on what you're looking for - ODDSRATIO statements are more intuitive than CONTRAST in my experience.

[gmm]

I am looking to see if there is a difference in the OHI (it assesses bioerosion) between the bones.