Table 2.
Association between quality of sleep and shift work, and other factors
| Variables | Crudea | Adjustedb | ||
|---|---|---|---|---|
| ORc | 95 % CId | OR | 95 % CI | |
| Length of night–shift Cycle | ||||
| Group A (6 weeks) | 1 | 1 | ||
| Group B (4 weeks) | 1.456 | 1.171–1.811 | 1.419 | 1.134–1.777 |
| Group C (12 days) | 2.348 | 1.852–2.977 | 2.238 | 1.737–2.882 |
| Age | ||||
| 20–29 | 1 | 1 | ||
| 30–39 | 0.834 | 0.665–1.046 | 0.883 | 0.670–1.163 |
| Obesity (BMI) | ||||
| 18.5–24.9 | 1 | 1 | ||
| < 18.5 | 1.000 | 0.787–1.270 | 1.059 | 0.844–1.329 |
| ≥ 25.0 | 1.119 | 0.891–1.403 | 1.072 | 0.865–1.328 |
| Smoking | ||||
| No | 1 | 1 | ||
| Current | 1.990 | 1.482–2.670 | 1.415 | 1.053–1.899 |
| Alcohol consumption | ||||
| No | 1 | 1 | ||
| Mild | 1.193 | 0.987–1.443 | 1.133 | 0.948–1.354 |
| Moderate | 1.611 | 1.314–1.976 | 1.418 | 1.170–1.720 |
| Regular Exercise | ||||
| < 3 times per weeks | 1 | 1 | ||
| ≥ 3 times per weeks | 0.962 | 0.818–1.133 | 0.936 | 0.803–1.092 |
| Job tenure | ||||
| < 5 years | 1 | 1 | ||
| 5–9 years | 0.904 | 0.747–1.093 | 0.552 | 0.340–0.896 |
| ≥ 10 years | 0.798 | 0.653–0.976 | 0.474 | 0.275–0.816 |
| Job tenure (Shift work) | ||||
| < 5 years | 1 | 1 | ||
| 5–9 years | 0.937 | 0.781–1.125 | 1.557 | 0.964–2.515 |
| ≥ 10 years | 0.848 | 0.682–1.053 | 1.906 | 1.102–3.296 |
| Sleep during working | ||||
| Impossible | 1 | 1 | ||
| Possible | 1.015 | 0.810–1.273 | 1.199 | 0.951–1.511 |
aanalysised by simple logistic regression analysis
badjusted by age, obesity, smoking, alcohol consumption, regular exercise, job tenure, shift work tenure, sleep during working
codds ratio, dconfidence interval