Table 7:
Baseline CHA2DS2VASc and HAS-BLED Scores in the Ontario Populationa
| Risk Factor | Score | Baseline Probability of Risk Factor | |
|---|---|---|---|
| CHA2DS2VASc | |||
| C | Congestive heart failure | 1 | 0.127 |
| H | Hypertension | 1 | 0.652 |
| A | Age ≥ 75 years | 2 | 0.418 |
| D | Diabetes mellitus | 1 | 0.220 |
| S | Prior stroke or transient ischemic attack | 2 | 0.144 |
| V | Vascular disease | 1 | 0.087 |
| A | Age 65–74 years | 1 | 0.228 |
| Sc | Sex category (female) | 1 | 0.479 |
| HAS-BLED | |||
| H | Hypertension | 1 | 0.652 |
| A | Abnormal renal function | 1 | 0.004 |
| Abnormal liver function | 1 | 0.200 | |
| S | Prior stroke or TIA | 1 | 0.144 |
| B | Bleeding history or predisposition | 1 | 0.047 |
| L | Labile INR | 1 | 0.268 |
| E | Elderly (age > 65 years) | 1 | 0.646 |
| D | Medication use predisposing to bleeding | 1 | 0.849 |
| History of drug or alcohol use | 1 | 0.006 | |
Abbreviation: INR, international normalized ratio.
a
Obtained from 35,143 patients with new-onset atrial fibrillation.
Source: Micieli et al, 2016.37