Table III.
Comparison of demographic characteristics of the Chinese adults with different work types.
| Demographic characteristics | Alla (n = 1346) | Day work (n = 931) | Permanent shift work (n = 98) | Rotating shift work (n = 139) | P-value |
|---|---|---|---|---|---|
| Age (years) | 34 (29–37) | 34 (29–37) | 34 (29–37) | 33 (27–37) | 0.152 |
| Abstinence period (day) | 4 (3–6) | 4 (3–6) | 4 (3–6) | 4 (3–6) | 0.303 |
| Sampling time point | 10 (9–10) | 10 (9–11) | 10 (9–10) | 10 (9–10) | 0.603 |
| Tobacco smoking | 0.005 | ||||
| Never | 484 (36.0%) | 363 (39.0%) | 21 (21.4%) | 44 (31.7%) | |
| Ever | 86 (6.4%) | 58 (6.2%) | 7 (7.1%) | 6 (4.3%) | |
| Current | 774 (57.6%) | 510 (54.8%) | 70 (71.4%) | 89 (64.0%) | |
| Alcohol drinking | 0.659 | ||||
| Yes | 855 (63.7%) | 595 (63.9%) | 67 (68.4%) | 88 (63.3%) | |
| No | 488 (36.3%) | 336 (36.1%) | 31 (31.6%) | 51 (36.7%) | |
| BMI | 22.0 (20.2–24.2) | 22.0 (20.2–24.2) | 22.3 (20.0–25.0) | 22.5 (20.5–24.3) | 0.469 |
| Education level | < 0.001 | ||||
| Primary school and below | 165 (12.4%) | 121 (13.1%) | 4 (4.2%) | 10 (7.2%) | |
| Junior school | 548 (41.0%) | 360 (38.9%) | 45 (46.9%) | 67 (48.2%) | |
| High school | 326 (24.4%) | 197 (21.3%) | 32 (33.3%) | 49 (35.3%) | |
| College and higher | 296 (22.2%) | 248 (26.8%) | 15 (15.6%) | 13 (9.4%) | |
| Family income (RMB/year) | 0.037 | ||||
| <3000 | 642 (48.8%) | 429 (46.8%) | 51 (54.8%) | 56 (41.2%) | |
| 3000–8000 | 378 (28.7%) | 283 (30.9%) | 21 (22.6%) | 34 (25.0%) | |
| 8000–13 000 | 193 (14.7%) | 136 (14.8%) | 11 (11.8%) | 30 (22.1%) | |
| >13 000 | 103 (7.8%) | 69 (7.5%) | 10 (10.8%) | 16 (11.8%) |
Values were presented as median (interquartile range) or frequency (percentage). Kruskal–Wallis test was used in the comparison of age, abstinence period, sampling time point and BMI. The χ2 test was used in the comparison of tobacco smoking, alcohol drinking, education level and family income.
a
One hundred and forty-three workers’ employment did not fit with one of the defined categories and 35 failed to complete the question.