| Outcome at mean 2.7 years | Warfarin | Aspirin | RRR (95% CI) | NNT (CI) |
| Major stroke, intracranial haemorrhage, or systemic embolism† | 4.9% (24/488) | 9.9% (48/485) | 50% (21 to 69) | 21 (12 to 58) |
*Abbreviations defined in glossary. RRR, NNT, and CI calculated from data in article.
†Major stroke (4.3% v 9.1%), other intracranial haemorrhage (0.4% v 0.2%), and systemic embolism (0.2% v 0.6%).
*Abbreviations defined in glossary. RRR, NNT, and CI calculated from data in article.
†Major stroke (4.3% v 9.1%), other intracranial haemorrhage (0.4% v 0.2%), and systemic embolism (0.2% v 0.6%).