37
Who Wants To Be A Millionaire?
How could you have known this?
•In
PH, the standard error of log hazard ratio estimates is approximately 2
divided by the square root of the number of events.
–A
P value of .0018 corresponds to | Z | = 3.13
–log(2.07)
= -log(0.48) is approximately 0.7
–3
x 2 / .7 is about 8.4
–Number
of deaths would be about 72
–We had 5000+ subjects with survival estimated down
to 30%