Table 3.

Percent of Patients with NVAF Not Receiving Warfarin within 12 Months, by CHADS₂ and ATRIA Scores

	Patient population, % (study sample, %)
Stroke risk	Low bleeding risk	Moderate bleeding risk	High bleeding risk
Low	40.1 (21.0)	40.2 (1.3)	58.9 (1.9)
Moderate	40.6 (39.3)	46.4 (5.5)	54.3 (16.3)
High	41.9 (7.3)	37.6 (1.1)	51.6 (6.4)

NOTE: Patients who received warfarin within 12 months but only after having a stroke are not considered to be receiving warfarin within 12 months.

ATRIA indicates Anticoagulation and Risk Factors in Atrial Fibrillation; NVAF, nonvalvular atrial fibrillation.