Table 3.
Hazard ratios (95% CI) for atrial fibrillation according to sleep duration in the Kailuan Study.
| Total | Sleep duration (hours) | P for interaction | ||
|---|---|---|---|---|
| ≤6.0 | 7 | ≥8.0 | ||
| Case, incidence, per 1000 person-years | 82 (0.54) | 51 (0.42) | 189 (0.53) | |
| Model 1 | 1.10 (0.78–1.57) | reference | 1.47 (1.08–2.00) | 0.67 |
| Model 2 | 1.09 (0.77–1.55) | reference | 1.47 (1.06–2.05) | 0.68 |
| Model 3 | 1.07 (0.75–1.53) | reference | 1.50 (1.07–2.10) | 0.75 |
| Women | ||||
| Case, incidence, per 1000 person-years | 15 (0.57) | 7 (0.27) | 32 (0.37) | |
| Model 1 | 1.47 (0.60–3.60) | reference | 2.12 (0.93–4.83) | |
| Model 2 | 1.43 (0.58–3.54) | reference | 1.71 (0.71–4.12) | |
| Model 3 | 1.28 (0.51–3.20) | reference | 1.69 (0.70–4.11) | |
| Men | ||||
| Case, incidence, per 1000 person-years | 67 (0.54) | 44 (0.45) | 157 (0.59) | |
| Model 1 | 1.04 (0.71–1.52) | reference | 1.38 (1.00–1.93) | |
| Model 2 | 1.03 (0.70–1.51) | reference | 1.43 (1.01–2.05) | |
| Model 3 | 1.03 (0.70–1.51) | reference | 1.46 (1.02–2.10) | |
Model 1: Adjusted for age and sex. Model 2: Adjusted for age, sex, level of education, smoking, alcohol, physical activity, snoring, and body mass index. Model 3: Adjusted for variables in Model 2 plus hypertension, diabetes mellitus, dyslipidaemia, myocardial infarction, uric acid, and high-sensitivity C-reactive protein.