Hello, I'm trying to include an interaction term in my cox regression model; one is a categorical variable (severite2=Mild or severe) and the second is continous (AgeAtAgentDate). Althouh i can see the HR estimates for all other variables in the model (the table is attached), I cannot see the HR estimates for the interaction term (AgeAtAgentDate, severite, severite*AgeAtAgentDate). proc phreg data=RMDATA.CCDAnalysis NAMELEN=100 MULTIPASS; class Severite2(ref="Mild") / param=ref; model TimetoHospitDeathcardioByYear*HospitDeathByCardio(0)= severite|AgeAtAgentDate Urbain male NSRG / SELECTION=B SLS=1 include=1 ties=discrete rl; ods output ParameterEstimates=EstimCCD ModelBuildingSummary=MSCCD; OUTPUT OUT=OUT XBETA=x; run;
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