Variables | Nationala | Eastern Chinab | Central Chinab | Western Chinab | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
OR | 95% CI | P value | OR | 95% CI | P value | OR | 95% CI | P value | OR | 95% CI | P value | |
Region (ref: eastern China) | ||||||||||||
Central China | 0.81 | 0.67–0.98 | 0.028 | |||||||||
Western China | 0.90 | 0.75–1.09 | 0.296 | |||||||||
Age (ref: 21-) | ||||||||||||
30- | 1.11 | 0.87–1.41 | 0.393 | 1.40 | 0.90–2.17 | 0.132 | 1.03 | 0.67–1.59 | 0.885 | 1.10 | 0.74–1.63 | 0.649 |
40- | 1.07 | 0.80–1.42 | 0.670 | 1.48 | 0.88–2.50 | 0.144 | 1.03 | 0.61–1.73 | 0.918 | 0.96 | 0.59–1.57 | 0.879 |
50- | 0.75 | 0.50–1.13 | 0.171 | 1.21 | 0.59–2.49 | 0.608 | 0.80 | 0.39–1.65 | 0.551 | 0.43 | 0.20–0.89 | 0.023 |
Gender (ref: male) | ||||||||||||
Female | 0.94 | 0.80–1.10 | 0.431 | 0.97 | 0.75–1.26 | 0.821 | 0.75 | 0.57–0.99 | 0.045 | 1.19 | 0.88–1.61 | 0.267 |
Marital status (ref: unmarried/widowed/divorced) | ||||||||||||
Married | 1.11 | 0.89–1.39 | 0.350 | 1.29 | 0.87–1.90 | 0.200 | 0.82 | 0.54–1.22 | 0.322 | 1.28 | 0.87–1.86 | 0.206 |
Education level (ref: associate’s degree or vocational diploma) | ||||||||||||
Bachelor degree | 1.06 | 0.88–1.27 | 0.557 | 1.12 | 0.76–1.66 | 0.565 | 1.15 | 0.83–1.58 | 0.402 | 0.98 | 0.74–1.31 | 0.894 |
Master degree or higher | 0.82 | 0.58–1.17 | 0.277 | 0.91 | 0.51–1.61 | 0.739 | 0.86 | 0.45–1.67 | 0.663 | 0.71 | 0.32–1.58 | 0.397 |
Work tenure (years, ref: 1-) | ||||||||||||
10- | 1.14 | 0.94–1.37 | 0.192 | 1.05 | 0.78–1.42 | 0.734 | 1.18 | 0.83–1.67 | 0.364 | 1.18 | 0.81–1.72 | 0.389 |
20- | 0.90 | 0.63–1.28 | 0.556 | 0.77 | 0.43–1.37 | 0.378 | 0.99 | 0.53–1.83 | 0.969 | 0.85 | 0.43–1.68 | 0.647 |
Contract status (ref: permanent) | ||||||||||||
Temporary | 0.84 | 0.71–1.00 | 0.047 | 0.99 | 0.69–1.41 | 0.950 | 0.90 | 0.67–1.21 | 0.502 | 0.71 | 0.54–0.94 | 0.017 |
Professional title (ref: elementary or below) | ||||||||||||
Intermediate | 1.16 | 0.96–1.39 | 0.121 | 0.97 | 0.70–1.34 | 0.852 | 1.31 | 0.94–1.82 | 0.108 | 1.11 | 0.80–1.54 | 0.545 |
Senior | 0.89 | 0.65–1.20 | 0.443 | 0.54 | 0.33–0.91 | 0.020 | 0.90 | 0.52–1.57 | 0.711 | 1.45 | 0.81–2.57 | 0.209 |
Management responsibility (ref: yes) | ||||||||||||
No | 0.44 | 0.35–0.54 | < 0.001 | 0.34 | 0.23–0.48 | < 0.001 | 0.48 | 0.33–0.69 | < 0.001 | 0.50 | 0.34–0.72 | < 0.001 |
Income level (ref: low) | ||||||||||||
Moderate | 0.77 | 0.65–0.92 | 0.003 | 0.91 | 0.68–1.22 | 0.530 | 0.68 | 0.50–0.93 | 0.015 | 0.76 | 0.56–1.03 | 0.078 |
High | 1.08 | 0.67–1.72 | 0.761 | 1.12 | 0.45–2.79 | 0.809 | 1.05 | 0.50–2.19 | 0.907 | 1.10 | 0.46–2.61 | 0.836 |
Working hours per week (ref: ≤ 40) | ||||||||||||
> 40 | 1.89 | 1.61–2.23 | < 0.001 | 2.08 | 1.56–2.78 | < 0.001 | 1.61 | 1.21–2.14 | 0.001 | 2.00 | 1.51–2.66 | < 0.001 |
Working overtime (ref: never) | ||||||||||||
Occasion | 2.50 | 1.86–3.35 | < 0.001 | 1.98 | 1.24–3.19 | 0.005 | 2.76 | 1.66–4.61 | < 0.001 | 2.91 | 1.63–5.18 | < 0.001 |
Frequent | 6.52 | 4.76–8.93 | < 0.001 | 4.25 | 2.57–7.03 | < 0.001 | 7.90 | 4.55–13.73 | < 0.001 | 8.89 | 4.80–16.47 | < 0.001 |
Occupational development opportunities (ref: low) | ||||||||||||
Moderate | 0.79 | 0.67–0.92 | 0.002 | 0.91 | 0.71–1.18 | 0.491 | 0.81 | 0.61–1.07 | 0.131 | 0.68 | 0.52–0.89 | 0.005 |
High | 0.94 | 0.70–1.26 | 0.680 | 1.31 | 0.82–2.09 | 0.261 | 0.53 | 0.31–0.91 | 0.022 | 1.22 | 0.68–2.19 | 0.505 |