Dear all, I want to use an instrumental variable in survival analysis, and I think the PROC SYSLIN is only for linear or logistic regression? Is there command specifically for Cox proportional hazards model? I am thinking to use below method, is it correct? Thanks for your help! PROC LOGISTIC DATA= data1; MODEL GRP = Distance; OUTPUT OUT = data2 PREDICTED=IV_grp; RUN; PROC PHREG DATA =data2; CLASS AGE RACE INCOME EDUCATION / PARAM=REF REF=First ; MODEL TIME*Status(0) = IV_grp AGE RACE INCOME EDUCATION ; RUN;
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