Summary Background In ROCKET AF, rivaroxaban was non-inferior to adjusted-dose warfarin in preventing stroke or systemic embolism among patients with atrial fi brillation (AF). We aimed to investigate whether the effi cacy and safety of rivaroxaban compared with warfarin is consistent among the subgroups of patients with and without previous stroke or transient ischaemic attack (TIA). Methods In ROCKET AF, patients with AF who were at increased risk of stroke were randomly assigned (1:1) in a double-blind manner to rivaroxaban 20 mg daily or adjusted dose warfarin (international normalised ratio 2·0–3·0). Patients and investigators were masked to treatment allocation. Between Dec 18, 2006, and June 17, 2009, 14 264 patients from 1178 centres in 45 countries were randomly assigned. The primary endpoint was the composite of stroke or non- CNS systemic embolism. In this substudy we assessed the interaction of the treatment eff ects of rivaroxaban and warfarin among patients with and without previous stroke or TIA. Effi cacy analyses were by intention to treat and safety analyses were done in the on-treatment population. ROCKET AF is registered with ClinicalTrials.gov, number NCT00403767. Findings 7468 (52%) patients had a previous stroke (n=4907) or TIA (n=2561) and 6796 (48%) had no previous stroke or TIA. The number of events per 100 person-years for the primary endpoint in patients treated with rivaroxaban compared with warfarin was consistent among patients with previous stroke or TIA (2·79% rivaroxaban vs 2·96% warfarin; hazard ratio [HR] 0·94, 95% CI 0·77–1·16) and those without (1·44% vs 1·88%; 0·77, 0·58–1·01; interaction p=0·23). The number of major and non-major clinically relevant bleeding events per 100 person-years in patients treated with rivaroxaban compared with warfarin was consistent among patients with previous stroke or TIA (13·31% rivaroxaban vs 13·87% warfarin; HR 0·96, 95% CI 0·87–1·07) and those without (16·69% vs 15·19%; 1·10, 0·99–1·21; interaction p=0·08). Interpretation There was no evidence that the relative effi cacy and safety of rivaroxaban compared with warfarin was diff erent between patients who had a previous stroke or TIA and those who had no previous stroke or TIA. These results support the use of rivaroxaban as an alternative to warfarin for prevention of recurrent as well as initial stroke in patients with AF.
|Titolo:||Rivaroxaban compared with warfarin in patients with atrial fibrillation and previous stroke or transient ischaemic attack: a subgroup analysis of ROCKET AF.|
|Data di pubblicazione:||2012|
|Appare nelle tipologie:||1.1 Articolo in rivista|