Comparison of CHADS2 versus CHA2DS2-VASc scoring systems
| Risk factor | CHADS2 score | CHA2DS2-VASc score |
| CHF/left ventricular dysfunction# | 1 | 1 |
| Hypertension | 1 | 1 |
| Age ≥75 years | 1 | 2 |
| Diabetes mellitus | 1 | 1 |
| Stroke/TIA/thromboembolism# | 2 | 2 |
| Vascular disease (previous myocardial infarction, PAD, aortic plaque) | NA | 1 |
| Age 65–74 years | NA | 1 |
| Sex category (female) | NA | 1 |
CHF: congestive heart failure; TIA: transient ischaemic attack; PAD: peripheral arterial disease; NA: not applicable. #: left ventricular dysfunction and thromboembolism are specific to CHA2DS2-VASc; these were not originally stated in CHADS2, which refers specifically to recent CHF.