Table 3 Bivariate analyses showing association of individual and work-related factors with mental health status of workers in SMEs (N = 1200)
       Variables | Poor psychological well-being | |
|---|---|---|
0 ~ 13 | 14 ~ 25 | |
(N = 424, 35.3%) | (N = 776, 64.7%) | |
Individual characteristics | Â | Â |
Age (years) (Mean ± SD) | 28.6 ± 8.7** | 32.4 ± 9.6 |
Gender | Â | Â |
 Men | 265(40.2)** | 388(59.8) |
 Women | 159(29.6) | 388(70.4) |
Marital status | Â | Â |
 Married/co-habiting | 201(28.3)** | 524(71.7) |
 Single | 220(46.3) | 244(53.7) |
 Divorced | 3(33.3) | 6(66.7) |
Educational level | Â | Â |
 Primary school or lower | 25(32.5) | 54(67.5) |
 Junior high school | 202(33.9) | 385(66.1) |
 Senior middle school | 163(37.1) | 280(62.9) |
 College or higher | 34(37.4) | 57(62.6) |
Individual monthly income (yuan) (Mean ± SD) | 2350 ± 855 | 2462 ± 826 |
Household registration | Â | Â |
Permanent resident workers | 84(29.0)** | 209(71.0) |
Migrant workers | 340(37.4) | 567(62.6) |
Physical work conditions | Â | Â |
Employment contract | Â | Â |
 Yes | 386(34.5)* | 728(65.5) |
 No | 38(45.7) | 48(54.3) |
Shift work schedule | Â | Â |
 Yes | 179(38.5) | 287(61.5) |
 No | 245(33.3) | 489(66.7) |
Work hours per week (hours) (Mean ± SD) | 56.8 ± 7.9** | 54.6 ± 8.0 |
Extent of exposure to hazardous environment (Mean ± SD) | 5.8 ± 2.3** | 5.3 ± 2.3 |
Psychosocial work conditions | Â | Â |
Job demands (Mean ± SD) | 4.8 ± 1.4** | 4.2 ± 1.5 |
Job autonomy (Mean ± SD) | 9.8 ± 2.4** | 10.9 ± 2.2 |
Worksite support (Mean ± SD) | 7.4 ± 1.1 | 7.5 ± 1.0 |