Table 4. Number of incident strokes, crude incidence rates, multivariate-adjusted hazard ratios, and population attributable fractions for atrial fibrillation (AF) by stroke subtype.
| No. | Crude incidencea |
No. | Crude incidencea |
HR (95% CI)b | PAF (%) | |
| Total | Without AF (n = 10 875) | With AF (n = 54) | ||||
| Hemorrhagic stroke | 89 | 0.8 | 2 | 3.7 | 2.90 (0.69–12.2) | 1.4 |
| Ischemic stroke | 253 | 2.2 | 9 | 16.7 | 4.51 (2.28–8.94) | 2.7 |
| SAH | 50 | 0.4 | 1 | 1.9 | 4.09 (0.54–30.7) | 1.5 |
| All strokes | 393 | 3.4 | 12 | 22.2 | 4.11 (2.28–7.41) | 2.2 |
| Men | Without AF (n = 4117) | With AF (n = 30) | ||||
| Hemorrhagic stroke | 42 | 1.0 | 1 | 3.7 | 3.15 (0.40–25.0) | 1.6 |
| Ischemic stroke | 143 | 3.3 | 3 | 11.1 | 2.16 (0.67–6.97) | 1.1 |
| SAH | 13 | 0.3 | 0 | 0 | 0 | — |
| All strokes | 198 | 4.5 | 4 | 14.9 | 2.12 (0.77–5.84) | 1.0 |
| Women | Without AF (n = 6758) | With AF (n = 24) | ||||
| Hemorrhagic stroke | 47 | 0.6 | 1 | 4.9 | 5.93 (0.77–45.6) | 1.7 |
| Ischemic stroke | 110 | 1.5 | 6 | 29.5 | 13.2 (5.43–32.1) | 4.8 |
| SAH | 37 | 0.5 | 1 | 4.9 | 8.69 (1.10–68.4) | 2.3 |
| All strokes | 195 | 2.7 | 8 | 39.3 | 10.6 (5.01–22.4) | 3.6 |
HR: hazard ratio, 95% CI: 95% confidence interval, PAF: population attributable fraction, SAH: subarachnoid hemorrhage.
aper 1000 person-years.
bHRs were calculated using a Cox proportional hazard model adjusted for geographical area, sex, age, smoking status, drinking status, obesity, hypertension, dyslipidemia, and diabetes mellitus.