Abstract
The optimal choice of oral P2Y<inf>12</inf> receptor inhibitors has the potential to significantly influence outcomes. We seek to compare the safety and efficacy of the three most commonly used oral P2Y<inf>12</inf> receptor inhibitors (clopidogrel, prasugrel, and ticagrelor) in acute coronary syndromes (ACS) via a comprehensive systematic review and network meta-analysis. In line with the Preferred Reporting Items for Systematic Reviews (PRISMA) guidelines, we performed a comprehensive search for RCTs which compared cardiovascular and hemorrhagic outcomes after use of at least two of the distinct oral P2Y<inf>12</inf> receptor inhibitors (i.e. clopidogrel, prasugrel, and ticagrelor). A search strategy has been designed to systematically search multiple databases, including MEDLINE with PubMed interface, The Cochrane Central Register of Controlled Trials, and Embase. In addition, key inclusion criteria will be trial size of at least 100 patients and at least 1 month of follow-up time. Several prespecified subgroups will be explored, including Asian patients, patients presenting with ST-elevation myocardial infarction, patients of advanced age, and others. Exploratory frequentist pairwise meta-analyses will be based primarily on a random-effects method, relying on relative risks (RR) for short-term outcomes and incidence rate ratios (IRR) for long-term outcomes. Inferential frequentist network meta-analysis will be based primarily on a random-effects method, relying on RR and IRR as specified above. Results will be reported as point summary of effect, 95% CI, and P values for effect, and graphically represented using forest plots. An international collaborative network meta-analysis has begun to comprehensively analyze the safety and efficacy of prasugrel, ticagrelor and clopidogrel, each on a background of aspirin, for management of patients with ACS. It is our hope that the rigor and breadth of the undertaking described herein will provide novel insights that will inform optimal patient care for patients with ACS treated conservatively, or undergoing revascularization.
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