Table 3. Main reasons why vitamin K antagonists were not given in patients with a CHADS2 score ≥2.
| Reason, n (%) | Patients with CHADS2≥2 (n = 2,302) |
| Alcohol misuse | 11 (0.5) |
| Already taking antiplatelet drug for another medical condition | 117 (5.1) |
| Patient refusal | 165 (7.2) |
| Previous bleeding event | 55 (2.4) |
| Taking medication contraindicated or cautioned for use with vitamin K antagonists | 16 (0.7) |
| Other | 239 (10.4) |
| Unknown | 587 (25.5) |
| Physician’s choice | 1,112 (48.3) |
| Bleeding risk | 170 (7.4) |
| Concern over patient compliance | 121 (5.3) |
| Guideline recommendation | 32 (1.4) |
| Fall risk | 150 (6.5) |
| Low risk of stroke | 95 (4.1) |
| Other | 544 (23.6) |