> If the difference between treatments isn't
> significant the confidence interval for your hazard
> ratio should include 1, so make sure to include the
> 95% confidence interval as well.
>
> Message was edited by: Reeza
Hi Reeza:
Thanks a lot!
I feel, basically, I am clear now. I got the point. Since the trt is not significant, HR's confident interval should include 1. Our data does include 1, ( 0.674, 1.465).
Also, our survival curve, code is below.
proc lifetest data = days plots=( s ls lls h(bw = 15 kernel = e ) );
time pfsdays*cen(1);
strata trt;
run;
Test of Equality over Strata
Pr >
Test Chi-Square DF Chi-Square
Log-Rank 0.0449 1 0.8322
Wilcoxon 0.3067 1 0.5797
-2Log(LR) 0.1083 1 0.7421
It is not significant. The survival curve, till about day 120, trt 1 curve is above trt 2 curve with two times trt 1 curve down till touching together. After day 120, trt2 curve is above trt1 curve with a few times trt 2 down till touching together.
I would like to say from this survival curve, trt 1 is better at first, and trt 2 is better later. Is this opinion correct?
Thanks!!
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