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) |