Efficacy and safety of potent platelet P2Y12 receptor inhibitors in elderly versus nonelderly patients with acute coronary syndrome: A systematic review and meta-analysis
Background The use of the potent oral P2Y12 inhibitors prasugrel and ticagrelor in patients with acute coronary syndromes (ACS) has a favorable net clinical effect compared with clopidogrel and is recommended as first-line therapy. However, the impact of these agents on ischemic and bleeding events in elderly ACS patients is not well defined. Methods We performed a systematic review of articles comparing potent P2Y12 inhibitors to clopidogrel in elderly and nonelderly patients (defined according to each study) with ACS in terms of efficacy (composite of cardiovascular death, myocardial infarction, or stroke) and safety (major bleeding) end points. Results A total of 7,860 elderly and 37,857 nonelderly patients from 7 studies (5 randomized control trials and 2 observational studies) were included. Potent P2Y12 inhibitors significantly reduced efficacy end point in nonelderly patients (relative risk [RR] 0.85, 95% CI 0.79-0.93) and less so in elderly patients (RR 0.95, 95% CI 0.86-1.05). No significant differences were found between potent P2Y12 inhibitors and clopidogrel in terms of safety end point in both elderly (RR 1.19, 95% CI 0.95-1.49) and nonelderly patients (RR 1.16, 95% CI 0.95-1.41). There were no significant interactions between age and treatment effect in both analyses (efficacy P int =.1 .16; safety P int =.8 .83). Conclusions The effect of more potent P2Y12 inhibitors compared with clopidogrel on efficacy and safety end points is consistent in elderly and younger patients. These data imply that potent P2Y12 inhibitors should not be withheld from eligible patients solely because of advanced age.
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