Table 3. Odds ratios for insomnia according to the non-regular work patterns.
| Non-regular work patterns | Crude | Model Ia | Model IIb | ||||
|---|---|---|---|---|---|---|---|
| Regular | 1.00 | 1.00 | 1.00 | ||||
| Non-regular | Non-per. | Part. | Non-typ. | ||||
| Type 1 | ∘ | - | - | 1.78 (1.50–2.11) | 1.74 (1.47–2.07) | 1.72 (1.45–2.05) | |
| Type 2 | - | ∘ | - | 0.96 (0.69–1.34) | 0.90 (0.64–1.27) | 1.04 (0.72–1.50) | |
| Type 3 | - | - | ∘ | 1.35 (1.11–1.64) | 1.30 (1.06–1.58) | 1.23 (1.00–1.53) | |
| Type 4 | - | ∘ | ∘ | 1.69 (1.18–2.43) | 1.58 (1.09–2.29) | 1.74 (1.17–2.58) | |
| Type 5 | ∘ | - | ∘ | 2.58 (1.97–3.39) | 2.48 (1.87–3.30) | 2.23 (1.64–3.04) | |
| Type 6 | ∘ | ∘ | - | 1.94 (1.44–2.60) | 1.90 (1.40–2.57) | 2.48 (1.78–3.46) | |
| Type 7 | ∘ | ∘ | ∘ | 2.43 (1.71–3.46) | 2.36 (1.63–3.40) | 2.87 (1.91–4.32) | |
Values are presented as odds ratio (95% confidence interval).
Non-per.: non-permanent worker; Part.: part-time worker; Non-typ.: non-typical worker.
aAdjusted for sex, age and health condition; bAdjusted for model I + education, income, occupational type, shift work, night work, job satisfaction, job stress, colleague support, working hour.