Hi guys, below is my proc phreg model snapshot.
Do you know how to define two-tailed test in the code below? so that my Pr>ChiSq in the SAS output is adjusted to two-tailed test?
ods trace on; proc phreg data=p.temp2; class A10(ref='30-39') combo1(ref='0') combo2(ref='0') .... /param=ref order=internal; model duration*vital_status1(1)=combo1 combo2 .../ties=Efron rl; where stage1=4; run; ods trace off;
Hi @Cruise,
Can you please clarify what are the null and alternative hypotheses for the statistical test you want to perform?
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