Cancundude,
Buckeyes pretty much nailed it. The Phase 2 post-hoc MACE analyses were based on a small number of 5-point MACE events, and included only very few 3-point MACE events. See this post for a breakdown. Because of this, the %RRRs from the Phase 2 post-hoc analyses should be taken with a grain of salt.
BearDownAZ