No new studies were identified from the updated searches. A total of two RCTs were found: the CHARISMA and the CURE study.The CURE study enrolled only patients with a recent non-ST segment elevation acute coronary syndrome. The use of clopidogrel plusaspirin, compared with placebo plus aspirin, was associated with a lower risk of cardiovascular events (OR: 0.87, 95% CI 0.81 to 0.94;P<0.01) and a higher risk of major bleeding (OR 1.34, 95% CI 1.14 to 1.57; P<0.01). Overall, we would expect 13 cardiovascularevents to be prevented for every 1000 patients treated with the combination, but 6 major bleeds would be caused. In the CURE trial,for every 1000 people treated, 23 events would be avoided and 10 major bleeds would be caused. In the CHARISMA trial, for every1000 people treated, 5 cardiovascular events would be avoided and 3 major bleeds would be caused.
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