Table 2. Definitions of the CHADS2 and CHA2DS2-VASc scores, with distribution of points*1.
| Score | Variable | Points |
| CHADS2 Score | ||
| C | Congestive heart failure | 1 point |
| H | Hypertension | 1 point |
| A | Age 75 or above | 1 point |
| D | Diabetes mellitus | 1 point |
| S2 | Prior stroke, TIA, or embolic event | 2 points |
| CHA2DS2-VASc Score | ||
| C | Congestive heart failure | 1 point |
| H | Hypertension | 1 point |
| A2 | Age 75 or above | 2 points |
| D | Diabetes mellitus | 1 point |
| S2 | Prior stroke, TIA, or embolic event | 2 points |
| V | Prior myocardial infarction and/or peripheral arterial occlusive disease | 1 point |
| A | Age 65–74 | 1 point |
| S | Female sex | 1 point |
TIA, transient ischemic attack;
*1Modified from the guidelines of the European Society of Cardiology (3)