Antithrombotic Medication for Cardioembolic Stroke Prevention

Table 4

CHADS₂ score quantification of stroke risk for patients with atrial fibrillation. NRAF: National Registry of Atrial Fibrillation. From [25].

CHADS2 score	No. of patients (𝑛=1733)	No. of stroke (𝑛=94)	NRAF crude stroke rate per 100 patient-years	NRAF adjusted stroke rate (95% CI)
0	120	2	1.2	1.9 (1.2 to 3.0)
1	463	17	2.8	2.8 (2.0 to 3.8)
2	523	23	3.6	4.0 (3.1 to 5.1)
3	337	25	6.4	5.9 (4.6 to 7.3)
4	220	19	8.0	8.5 (6.3 to 11.1)
5	65	6	7.7	12.5 (8.2 to 17.5)
6	5	2	44.0	18.2 (10.5 to 27.4)