Table 1.
CHADS2 score
| C: | Congestive heart failure | = 1 point |
| H: | Hypertension (systolic > 160 mmHg) | = 1 point |
| A: | Age > 75 years | = 1 point |
| D: | Diabetes | = 1 point |
| S: | Prior transient ischemic attack or stroke | = 2 points |
| CHADS2 score | Adjusted stroke rate* (%) [95% CI] |
|---|---|
| 0 | 1.9 (1.2–3.0) |
| 1 | 2.8 (2.0–3.8) |
| 2 | 4.0 (3.1–5.1) |
| 3 | 5.9 (4.6–7.3) |
| 4 | 8.5 (6.3–11.1) |
| 5 | 12.5 (8.2–17.5) |
| 6 | 18.2 (10.5–27.4) |
Notes: The annual stroke rates for patients suffering from atrial fibrillation according to the CHADS2 Score. Patients with a CHADS2 Score of 0 are considered to have a low risk for cardioembolic stroke. Patients with a score of 1–2 are classified as having a moderate risk for stroke and should be medically treated with an antithrombotic agent. Patients with a score of 3 or higher have a high risk for thromboembolic complications and require optimal antithrombotic treatment as well.
*
The adjusted stroke rate is the expected stroke rate per 100 person/years derived from the multivariable model assuming that aspirin is not taken.