Fig. 2From: Risk of major bleeding at different PT-INR ranges in elderly Japanese patients with non-valvular atrial fibrillation receiving warfarin: a nested case-control studyDistribution of prothrombin time-international normalized ratio (PT-INR) in control and case patients. Median PT-INR (interquartile range) for case and control patients are 2.62 (1.97 – 5.30) and 1.75 (1.52 – 2.14), respectively. A significant difference is detected by paired t-testBack to article page