Demographic characteristics, work conditions and sleep and mental health status in workers with different shift types
| Day shift only | With night shift | |||||
|---|---|---|---|---|---|---|
| All (N=16 440) | Fixed (n=14 444) | Rotating (n=441) | Fixed (n=219) | Rotating (n=1336) | p Value | |
| Demographic characteristics | ||||||
| Age (years) (mean±SD) | 41.0±10.1 | 41.2±10.1 | 40.2±10.5 | 39.4±10.2 | 39.5±9.9 | <0.001 |
| Female gender (%) | 44.3 | 45.9 | 53.1 | 32.0 | 26.1 | <0.001 |
| Education (%) | <0.001 | |||||
| Primary | 5.4 | 5.6 | 6.1 | 5.0 | 2.6 | |
| Secondary | 61.5 | 60.3 | 65.5 | 77.6 | 70.9 | |
| University | 33.1 | 34.1 | 28.3 | 17.4 | 26.8 | |
| Work characteristics | ||||||
| Work hours per week (%) | <0.001 | |||||
| <40 | 7.1 | 7.0 | 18.4 | 3.2 | 5.5 | |
| =40 | 51.0 | 53.3 | 29.0 | 22.4 | 37.4 | |
| 40–49 | 28.7 | 27.6 | 34.5 | 46.6 | 35.0 | |
| 49–60 | 8.6 | 8.2 | 12.9 | 11.0 | 10.8 | |
| ≥60 | 4.7 | 3.8 | 5.2 | 16.9 | 11.5 | |
| Job control score (mean±SD) | 49.8±13.8 | 50.1±13.8 | 48.7±14.2 | 44.9±13.4 | 48.1±12.9 | <0.001 |
| Job demands score (mean±SD) | 52.2±13.3 | 51.9±13.2 | 52.3±13.5 | 52.3±12.8 | 55.6±14.2 | <0.001 |
| Workplace justice score (mean±SD) | 59.6±15.7 | 59.9±15.6 | 58.4±14.6 | 53.3±19.1 | 57.7±16.1 | <0.001 |
| Workplace violence (%) | 10.0 | 9.1 | 14.3 | 16.4 | 17.2 | <0.001 |
| Job insecurity (%) | 51.7 | 51.3 | 64.2 | 58.0 | 50.7 | 0.046 |
| Sleep and mental health status | ||||||
| Total sleep duration (hours) (mean±SD) | 7.30±1.0 | 7.32±0.9 | 7.33±1.0 | 6.96±1.2 | 7.17±1.1 | <0.001 |
| Insomnia (%) | 13.3 | 12.6 | 15.7 | 22.8 | 18.0 | <0.001 |
| Burnout score (mean±SD) | 28.5±20.9 | 28.1±20.7 | 29.9±21.4 | 34.5±22.7 | 32.4±22.3 | <0.001 |
| Minor mental disorder (%) | 16.0 | 15.3 | 18.1 | 24.2 | 20.9 | <0.001 |
The t-tests were adopted for continuous variables and χ2 tests for categorical variables.