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 USMLE Step 2 CK Forum USMLE Step 2 CK Discussion Forum: Let's talk about anything related to USMLE Step 2 CK exam

#1
09-09-2012
 USMLE Forums Guru Steps History: 1+CK+CS Posts: 461 Threads: 279 Thanked 199 Times in 103 Posts Reputation: 209
randomized clinical trial

Hi all:

UW Q id: 7690 explanation says that the hazard ration for all cause mortality was 0.86, but the p value was not statistically significant( not less than 0.01), why it is 0.01, should be 0.05, right?

Thank you!

#2
09-09-2012
 USMLE Forums Master Steps History: 1+CK+CS Posts: 851 Threads: 88 Thanked 748 Times in 399 Posts Reputation: 758

U brought up a good point .

I know one thing is that, for 99% confidence interval p=.01 and for 95% confidence interval p=.05

Most of the time p is used as .05

but I dont know why they have used p value as .01 here

though in this Question when HR is .86 the p value is .12 which is >.05
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Last edited by step_enhancer; 09-09-2012 at 03:36 AM.

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