1-Month or 3-Month DAPT in Women and Men at High Bleeding Risk Undergoing PCI.

Background
In patients at high bleeding risk (HBR), short dual antiplatelet therapy (DAPT) after percutaneous coronary intervention (PCI) is associated with reduced bleeding and preserved ischemic protection.Objectives
The aim of this study was to compare 2 short DAPT regimens, followed by aspirin monotherapy, in women and men at HBR undergoing PCI.Methods
Data from 3 prospective, international studies (XIENCE Short DAPT Program) including patients at HBR undergoing PCI with fluoropolymer-based cobalt-chromium everolimus-eluting stents (XIENCE) were analyzed. The primary endpoint was the composite of death or myocardial infarction (MI) at 1 year. The key secondary endpoint was Bleeding Academic Research Consortium (BARC) types 2 to 5 bleeding.Results
Among 3,364 patients, 1,154 (34.3%) were women. At 1 year, the rates of death or MI (7.6% vs 8.1%) and BARC types 2 to 5 bleeding (9.5% vs 9.2%) were similar in women and men. One-month and 3-month DAPT conferred a similar risk for death or MI in women (adjusted HR: 0.86; 95% CI: 0.54-1.36) and men (adjusted HR: 1.04; 95% CI: 0.75-1.44) (P for interaction = 0.783). In both sexes, BARC types 2 to 5 bleeding was numerically lower with 1-month DAPT, although not significant after propensity score stratification (women: 7.1% vs 11.2%; adjusted HR: 0.66; 95% CI: 0.43-1.02; men: 8.5% vs 9.7%; adjusted HR: 0.78; 95% CI: 0.57-1.06) (P for interaction = 0.378).Conclusions
Among patients at HBR undergoing PCI with everolimus-eluting stents, 1- and 3-month DAPT was associated with similar risk for ischemic events irrespective of sex. In both women and men, 1-month DAPT resulted in less clinically relevant bleeding, although the bleeding risk difference was not significant after propensity score stratification.