For patients with significant CAD, which of the following has not been shown.. Vitamin E

For patients with significant CAD, which of the following has not been shown
to improve survival and decreased coronary events?
a. Statin drugs
b. Beta blockers
c. ACE inhibitors
d. Aspirin
e. Vitamin E

Answer e:
Statins, beta blockers, ACE inhibitors and aspirin have all be shown to improve survival in patients with CAD while Vitamin E does not improve survival.