topic Ordinal Logistic Regression: how to compare variable levels in SAS Software for Learning Community

Ordinal Logistic Regression: how to compare variable levels

gmm — Fri, 14 Apr 2023 17:45:48 GMT

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;

Re: Ordinal Logistic Regression: how to compare variable levels

Reeza — Fri, 14 Apr 2023 17:56:02 GMT

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

Re: Ordinal Logistic Regression: how to compare variable levels

gmm — Fri, 14 Apr 2023 23:20:11 GMT

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