Fig. 3From: Risk of major bleeding at different PT-INR ranges in elderly Japanese patients with non-valvular atrial fibrillation receiving warfarin: a nested case-control studyComparisons of odds ratios (ORs) and 95 % confidence intervals for developing major bleeding stratified by prothrombin time-international normalized ratio (PT-INR). The horizontal bars indicate 95 % confidence intervals (CIs) calculated by the conditional logistic regression methodBack to article page