Stroke risk according to CHADS2 score in patients with atrial fibrillation in nonperioperative and perioperative clinical settings
| CHADS2 score . | Nonperioperative setting: annual stroke rate (95% CI)* . | Perioperative setting: 30-day postoperative stroke rate (95% CI)† . |
|---|---|---|
| 0 | 1.9 (1.2-3.0) | 1.01 (0.83-1.21) |
| 1 | 2.8 (2.0-3.8) | 1.62 (1.46-1.79) |
| 2 | 4.0 (3.1-5.1) | 2.05 (1.87-2.24) |
| 3 | 5.9 (4.6-7.3) | 2.63 (2.26-3.04) |
| 4 | 8.5 (6.3-11.1) | 3.62 (2.66-4.80) |
| 5 | 12.5 (8.2-17.5) | 3.65 (1.83-6.45) |
| 6 | 18.2 (10.5-27.4) | 7.35 (2.42-16.3) |
| CHADS2 score . | Nonperioperative setting: annual stroke rate (95% CI)* . | Perioperative setting: 30-day postoperative stroke rate (95% CI)† . |
|---|---|---|
| 0 | 1.9 (1.2-3.0) | 1.01 (0.83-1.21) |
| 1 | 2.8 (2.0-3.8) | 1.62 (1.46-1.79) |
| 2 | 4.0 (3.1-5.1) | 2.05 (1.87-2.24) |
| 3 | 5.9 (4.6-7.3) | 2.63 (2.26-3.04) |
| 4 | 8.5 (6.3-11.1) | 3.62 (2.66-4.80) |
| 5 | 12.5 (8.2-17.5) | 3.65 (1.83-6.45) |
| 6 | 18.2 (10.5-27.4) | 7.35 (2.42-16.3) |
CHADS2 indicates Cardiac failure-Hypertension-Age-Diabetes-Stroke; and CI, confidence interval.
Based on risk for stroke in untreated patients.8
Based on linked administrative database from 1996-2001 of patients with atrial fibrillation who were hospitalized for surgery, but no information on perioperative anticoagulation is available (adapted with permission from Kaatz S, et al. J Thromb Haemost. 2010;8(5):884-89011 ).