Petersen, P.

patient stroke atrial fibrillation atrial fibrillation study aspirin event prevention trial ischemic ischemic stroke stroke prevention anticoagulant therapy warfarin outcome group prediction rule anticoagulation arch intern med patient age factor 100 patient-years nonvalvular atrial fibrillation scheme nonrheumatic atrial fibrillation heart af patients analysis randomized event rate figure intern hypertension treatment heart failure prediction table result death atrial fibrillation investigators non-rheumatic atrial fibrillation patient-year afasak nonvalvular antithrombotic therapy swets subs service ann intern med stroke risk framingham erasmus mc participant investigator hazard effect systolic blood pressure stroke rates risk factors diabetes failure downloaded february ischemic attack blood ratio patient history event rates population infarction point aspirin therapy hemorrhage thromboembolism history association embolism 100 pys low-dose warfarin /100