Demographic characteristics of participants and results of the univariate analysis (n=1209)
| Variable | n (%) | WRQoL-2 mean (SD) | t/F | P value |
| Gender | 0.95 | 0.135 | ||
| Female | 1172 (96.9) | 3.49 (0.60) | ||
| Male | 37 (3.1) | 3.59 (0.74) | ||
| Age | 0.95 | 0.435 | ||
| ≤25 | 190 (15.7) | 3.52 (0.60) | ||
| 26–30 | 459 (38.0) | 3.49 (0.62) | ||
| 31–35 | 321 (26.6) | 3.45 (0.58) | ||
| 36–40 | 86 (7.1) | 3.56 (0.65) | ||
| ≥41 | 153 (12.7) | 3.53 (0.57) | ||
| Year(s) working | 1.63 | 0.180 | ||
| ≤5 | 397 (32.8) | 3.53 (0.61) | ||
| 6–10 | 433 (35.8) | 3.45 (0.59) | ||
| 11–15 | 154 (12.7) | 3.48 (0.63) | ||
| ≥16 | 225 (18.6) | 3.53 (0.59) | ||
| Marital status | 0.09 | 0.916 | ||
| Single | 363 (30.0) | 3.51 (0.60) | ||
| Married | 818 (67.7) | 3.49 (0.60) | ||
| Divorced/separated/widowed | 28 (2.3) | 3.52 (0.48) | ||
| Work unit | 3.89 | 0.009 | ||
| Internal medicine | 384 (31.8) | 3.54 (0.62) | ||
| General surgical | 530 (43.8) | 3.43 (0.58) | ||
| Gynaecology/paediatrics | 75 (6.2) | 3.57 (0.53) | ||
| Others | 220 (18.2) | 3.56 (0.63) | ||
| Work rank | 11.29 | <0.001 | ||
| Junior | 196 (16.2) | 3.68 (0.61) | ||
| Intermediate | 696 (57.6) | 3.45 (0.59) | ||
| Senior | 317 (26.2) | 3.48 (0.61) | ||
| Educational level | 0.70 | 0.484 | ||
| Lower than bachelor’s degree | 256 (21.2) | 3.52 (0.63) | ||
| Bachelor’s degree or higher | 953 (78.8) | 3.49 (0.53) | ||
| Nightshift (per week) | 7.57 | <0.001 | ||
| No | 334 (27.6) | 3.58 (0.58) | ||
| 1 | 192 (15.9) | 3.59 (0.60) | ||
| 2 | 379 (31.3) | 3.46 (0.59) | ||
| ≥3 | 304 (25.1) | 3.39 (0.62) | ||
| Pregnant | −0.38 | 0.704 | ||
| No | 1151 (95.2) | 3.49 (0.60) | ||
| Yes | 58 (4.8) | 3.53 (0.55) | ||
| Breast feeding | −0.29 | 0.771 | ||
| No | 1100 (91.0) | 3.49 (0.60) | ||
| Yes | 109 (9.0) | 3.51 (0.58) | ||
| Number of children | 0.36 | 0.697 | ||
| 0 | 566 (46.8) | 3.51 (0.61) | ||
| 1 | 589 (48.7) | 3.49 (0.59) | ||
| ≥2 | 54 (4.5) | 3.44 (0.61) | ||
| Looking after the elderly | 3.58 | <0.001 | ||
| No | 620 (51.3) | 3.56 (0.58) | ||
| Yes | 589 (48.7) | 3.43 (0.61) | ||
| Sleep disorders | 11.19 | <0.001 | ||
| No | 560 (46.3) | 3.69 (0.55) | ||
| Yes | 649 (53.7) | 3.32 (0.59) | ||
| Chronic disease | 7.48 | <0.001 | ||
| No | 947 (78.3) | 3.56 (0.57) | ||
| Yes | 262 (21.7) | 3.26 (0.64) | ||
| Frequent overtime work | 8.19 | <0.001 | ||
| No | 919 (76.0) | 3.57 (0.58) | ||
| Yes | 290 (24.0) | 3.25 (0.61) |
WRQoL-2, work-related Quality of Life Scale-2.