Question normal

First, I would thank authors, faculty, and residents for this nice discussion. I have multiple questions.

FIRST, why the ASA had been stopped. In this case, it is comparison between warfarin and dabigatran rather than dabigatran and ASA.

SECOND, Why the study is not blind?

THIRD, How the p-value was calculated?

FOURTH, What are the NNT?

FIFTH, In general, the 150 arm is safer than the two other arms. Is that difference statistically significant?