Short-term DAPT after coronary stenting has similar ischemic and bleeding outcomes as long-term DAPT: a 5-year population-based cohort study.

Abstract

Optimal duration of dual antiplatelet therapy (DAPT) following percutaneous coronary intervention (PCI) remains controversial. We investigated the relationship between DAPT duration following PCI and long-term ischemic and bleeding outcomes under real-world conditions. Patients aged ≥ 65years who underwent PCI with stenting in Western Australian hospitals between 2003 and 2008 and survived 2years were identified from linked hospital admissions data. The primary outcome was major adverse cardiovascular and cerebrovascular events (MACCE) defined as a composite of all-cause death and admissions for acute coronary syndrome (ACS), coronary artery revascularization procedure, stroke, and major bleeding. Secondary outcomes were ACS admissions, all-cause death, and major bleeding admissions. Patients were followed up for 5years from initial PCI. A total of 3963 patients were included in the final analysis. The mean age of the cohort was 74.5 ± 6.1years with 67.3% males. No significant difference was seen with 6-12, 12-18, or 18-24months DAPT, compared to 0-6months DAPT duration for MACCE and all secondary outcomes at 3- and 5-year post-PCI. There is no significant difference in both bleeding and ischemic outcomes in long-term DAPT as compared to short-term DAPT for first- and second-generation drug-eluting stents in a real-world population.