CHADS2 Score
Gage BF et al. JAMA 2001; 285: 2864-70
Scoring
| CHADS2 Criteria | Score |
| CHF | 1 |
| HTN | 1 |
| Age > 75 | 1 |
| Diabetes | 1 |
| Stroke/TIA | 2 |
Stroke Risk
| CHADS2 Score | Annualized Stroke Risk |
| 0 | 1.9% |
| 1 | 2.8% |
| 2 | 4.0% |
| 3 | 5.9% |
| 4 | 8.5% |
| 5 | 12.5% |
| 6 | 18.2% |
CHA2DS2-VASc Score
Lip GY et al. Chest 2010; 137: 263-72
Scoring
| CHA2DS2-VASc Criteria | Score |
| CHF | 1 |
| HTN | 1 |
| Age > 75 | 2 |
| Diabetes | 1 |
| Stroke/TIA/systemic embolism | 2 |
| Vacular disease (CAD, MI, PAD, aortic plaque) | 1 |
| Age 65-74 | 1 |
| Female | 1 |
Stroke risk
| CHA2DS2-VASc Score | Annualize Stroke Risk in Original Study
(Chest 2010; 137: 263-72) |
Theoretical Thromboembolic Rates Without Therapy
(Stroke 2010; 41:2731-2738 |
| 0 | 0 | 0 |
| 1 | 0.6% | 1.3% |
| 2 | 1.6% | 2.2% |
| 3 | 3.9% | 3.2% |
| 4 | 1.9% | 4.0% |
| 5 | 3.2% | 6.7% |
| 6 | 3.6% | 9.8% |
| 7 | 8.0% | 9.6% |
| 8 | 11.1% | 6.7% |
| 9 | 100% (n=1 in original study) | 15.2% |
