I am running cox proportional hazard regression in SPSS to see the association of 'predictor' with risk of a disease in a 10 years follow-up. I have another variable 'age_quartiles' with values 1,2,3,4 and want to use '1' as reference to get HRs for 2,3, and 4 relative to '1'. When I put this variable in Strata I still get one 'HR' as follows ('S_URAT_07' is the predictor with continuous values);

Question: How do I get HRs for 2,3 and 4 keeping 1 as reference group? Am I suppose to choose a specific method?

I am running cox proportional hazard regression in SPSS to see the association of 'predictor' with risk of a disease in a 10 years follow-up. I have another variable 'age_quartiles' with values 1,2,3,4 and want to use '1' as reference to get HRs for 2,3, and 4 relative to '1'. When I put this variable in Strata I still get one 'HR' as follows ('S_URAT_07' is the predictor with continuous values);

Question: How do I get HRs for the predictor for the event based on 'age_quartiles' 2,3 and 4 and keeping 1 as reference group? 'age_quartile' is not a predictor here. Am I suppose to choose a specific method?