Dual versus mono antiplatelet therapy in mild‐to‐moderate stroke during hospitalization

Abstract

Abstract Objective Subsequent vascular events are common after acute ischemic stroke during hospitalization. This study aimed to analyze the effectiveness of combination therapy with clopidogrel and aspirin among mild‐to‐moderate ischemic stroke patients treated within 72 h on the basis of a high‐intensity dose of statins. Methods In a retrospective and multicenter cohort study, acute (within 72 h of onset) mild‐to‐moderate stroke patients were divided into aspirin and clopidogrel‐aspirin groups on the basis of a high‐intensity dose of statin therapy. The primary outcome was compound vascular events during hospitalization. Cox's proportional hazards model was used to assess differences, with the study center as a random effect. Results Among the 506 patients meeting the eligibility criteria, all subjects received a high‐intensity dose of statins, including 20 mg rosuvastatin or 40 mg atorvastatin while in the hospital. In an unadjusted analysis, compound vascular events occurred in 7.2% of patients in the clopidogrel‐aspirin group compared with 13.7% of those in the aspirin group (p = 0.022). In a Cox proportional hazards regression analysis, clopidogrel‐aspirin was associated with a lower risk of compound vascular events (hazard ratio [95% CI], 0.47 [0.25–0.87]; p = 0.017) and ischemic vascular events (p = 0.008). Moderate and severe hemorrhage occurred in four patients (1.07%) in the clopidogrel‐aspirin group and three patients (2.30%) in the aspirin group (p = 0.626). Interpretation In this study based on high‐intensity statin therapy, clopidogrel‐aspirin reduced the risk of compound vascular events and did not increase the risk of hemorrhage during patients' hospitalization after mild‐to‐moderate ischemic stroke within 72 h.