01 August 2020: Clinical Research
Effects of Occupational Stress and Circadian CLOCK Gene Polymorphism on Sleep Quality of Oil Workers in Xinjiang, China
Li Ning 1BCDEF* , Lingyun Shi 2BCDEF* , Ning Tao 1BC , Rong Li 1BC , Ting Jiang 1BC , Jiwen Liu 1ABEG*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%) |