I am running a proc phreg statement modeling outcome with time with only one variable in the model. Since the time variable span from 0-24 months, would it be possible to adjust the statement below to get the HR at different time points e.g. (6 m, or 12 m)?
proc phreg data=;
class drug (ref='1') / param=ref;
model period*outcome(0)= drug / risklimits;
run;
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