Table I.
Baseline Characteristics
| Without AF | With AF | ||||||
|---|---|---|---|---|---|---|---|
| Variable | n | % | n | % | n | % | P Value |
| Patients | 150,408 | 100 | 126,503 | 84.1 | 23,905 | 15.9 | |
| Age (mean ± SD) years | 67.6 ± 13.6 | 66.6 ± 13.9 | 72.8 ± 10.5 | <0.001 | |||
| Age <65 years | 52,086 | 34.6 | 47,577 | 37.6 | 4,544 | 19.0 | |
| Age 65–74 years | 46,602 | 31.0 | 38,994 | 30.8 | 7,608 | 31.8 | |
| Age >74 years | 51,720 | 34.4 | 39,932 | 31.6 | 11,753 | 49.2 | |
| Age >75 years | 46,286 | 30.8 | 35,567 | 28.1 | 10,665 | 44.6 | |
| Female | 64,835 | 43.1 | 54,748 | 43.3 | 10,087 | 42.2 | 0.002 |
| Congestive heart failure | 15,326 | 10.2 | 9,932 | 7.9 | 5,394 | 22.6 | <0.001 |
| Hypertension | 120,631 | 80.2 | 102,830 | 81.3 | 17,801 | 74.5 | <0.001 |
| Diabetes mellitus | 53,115 | 35.3 | 44,236 | 35.0 | 8,879 | 37.1 | <0.001 |
| History of stroke | 5,984 | 4.0 | 4,302 | 3.4 | 1,682 | 7.0 | <0.001 |
| Vascular disease | 45,755 | 30.4 | 36,603 | 28.9 | 9,152 | 38.3 | <0.001 |
AF = atrial fibrillation; SD = standard deviation.