What are the effects of home testing of international normalized ratio on clinical events?
Matchar et al. (2010) conducted a study to assess the effects of home testing of international normalized ratio (INR) on clinical events. The study was conducted with a group of patients with atrial fibrillation that had been prescribed warfarin. The study found that home testing of INR was associated with an increased likelihood of time in therapeutic range, fewer episodes of over-anticoagulation, and fewer stroke events than usual care. The study concluded that home testing of INR may be beneficial for patients with atrial fibrillation who are on warfarin.