Figure 4. Practice level variation in total OAC (A), warfarin (B), and NOAC (C) use for AF patients with CHA₂DS₂-VASc score ≥2.

OAC = oral anticoagulant; NOAC = non-vitamin K antagonist oral anticoagulant; AF = atrial fibrillation; CHA₂DS₂-VASc = congestive heart failure, hypertension, age ≥75 years, diabetes mellitus, prior stroke, transient ischemic attack, or thromboembolism, vascular disease, age 65–74 years, sex category (female).

^*Others include nursing hospital, public health centers, etc.