Table 1.
Descriptive Summary of the 4 Study Cohorts
| Patient characteristic | Study sample (N = 9455) | Cohort 1 (n = 8905) | Cohort 2 (N = 276) | Cohort 3 (N = 261) | Cohort 4 (N = 13) |
|---|---|---|---|---|---|
| Mean age, yrs (SD) | 79 (9.5) | 78.8 (9.5) | 80.9 (9.1) | 83.5 (8) | 78.6 (9.5) |
| Age range, yrs (median) | 27–106 (80) | 27–106 (79) | 36–102 (81) | 55–99 (84) | 60–91 (77) |
| Males, % | 35 | 35 | 28.3 | 26.4 | 38.5 |
| ≥1 warfarin prescriptions in 90 days after AF index, %a | 49.3 | 49.3 | 45.7 | 30.3 | 46.2 |
| Mean all-cause allowed costs in 12 months before AF index, $ (SD) | 13,073 (21,020) | 12,949 (20,548) | 15,773 (25,491) | 14,605 (29,880) | 9920 (17,847) |
| Mean HCC score (SD) | 1.84 (1.55) | 1.83 (1.54) | 2.17 (1.72) | 2.00 (1.70) | 1.91 (1.72) |
a
Excluded patients who received warfarin after having a stroke.
AF indicates atrial fibrillation; HCC, Hierarchical Condition Categories; SD, standard deviation.