Table 4.
Hazard ratios (95% CI) for atrial fibrillation according to sleep duration stratified by age in the Kailuan Study.
| Sleep duration (hours) | P for interaction | |||
|---|---|---|---|---|
| ≤6.0 | 7 | ≥8.0 | ||
| Age < 60 | ||||
| Case, incidence, per 1000 person-years | 23 (0.20) | 18 (0.18) | 96 (0.32) | |
| Model 1 | 0.99 (0.54–1.84) | reference | 1.95 (1.18–3.22) | 0.10 |
| Model 2 | 1.00 (0.54–1.85) | reference | 1.87 (1.10–3.19) | 0.09 |
| Model 3 | 0.95 (0.51–1.78) | reference | 1.86 (1.09–3.18) | 0.14 |
| Age >= 60 | ||||
| Case, incidence, per 1000 person-years | 59 (1.67) | 33 (1.44) | 93 (1.71) | |
| Model 1 | 1.13 (0.74–1.73) | reference | 1.22 (0.82–1.82) | |
| Model 2 | 1.10 (0.72–1.69) | reference | 1.25 (0.81–1.92) | |
| Model 3 | 1.10 (0.71–1.70) | reference | 1.30 (0.84–2.00) | |
Model 1: Adjusted for age and sex. Model 2: Adjusted for age, sex, level of education, smoking, alcohol, physical activity, 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.