01 August 2020 : Clinical Research
Effects of Occupational Stress and Circadian CLOCK Gene Polymorphism on Sleep Quality of Oil Workers in Xinjiang, China
Li Ning1BCDEF, Lingyun Shi2BCDEF, Ning Tao1BC, Rong Li1BC, Ting Jiang1BC, Jiwen Liu1ABEG*DOI: 10.12659/MSM.924202
Med Sci Monit 2020; 26:e924202
Table 9 Comparison of sleep disorder incidence rate of oil workers in Xinjiang with different characteristics.
| Items | Cases | Sleep disorder (n=776) | χ2 | P | |
|---|---|---|---|---|---|
| Sex | Male | 1020 | 357 (35.00%) | 2.373 | 0.123 |
| Female | 1096 | 419 (38.23%) | |||
| Age | ≤30 years old | 385 | 131 (34.03%) | 3.242 | 0.198 |
| 30~45 years old | 1122 | 431 (38.41%) | |||
| >45 years old | 609 | 214 (35.14%) | |||
| Ethnic group | Han | 1560 | 556 (36.28%) | 0.391 | 0.532 |
| Minority | 556 | 210 (37.77%) | |||
| Length of service | ≤15 years | 765 | 269 (35.16%) | 1.176 | 0.278 |
| >15 years | 1351 | 507 (37.53%) | |||
| Work type | Oil production | 253 | 91 (35.97%) | 4.330 | 0.115 |
| Oil delivery | 737 | 292 (39.62%) | |||
| Stoker | 1126 | 393 (34.90%) | |||
| Work shifts | Fixed day shift | 775 | 243 (31.35%) | 17.937 | |
| Regular shift | 1180 | 459 (38.90%) | |||
| Irregular shift | 161 | 74 (45.96%) | |||
| Professional title | Medium grade and below | 1208 | 411 (34.02%) | 8.511 | |
| Senior | 908 | 365 (40.20%) | |||
| Education | Below junior college | 786 | 300 (38.17%) | 1.203 | 0.273 |
| Junior college and above | 1330 | 476 (35.79%) | |||
| Marriage | Unmarried | 275 | 92 (33.45%) | 1.410 | 0.235 |
| Married | 1841 | 684 (37.15%) | |||
| Income | ≤3500 | 733 | 262 (35.74%) | 0.417 | 0.518 |
| >3500 | 1383 | 514 (37.17%) | |||
| Smoking | Yes | 722 | 283 (39.20%) | 3.006 | 0.083 |
| No | 1394 | 493 (35.37%) | |||
| Drinking | Yes | 1112 | 424 (38.13%) | 2.141 | 0.143 |
| No | 1004 | 352 (35.06%) |