TABLE 2.
Comparison of the incidence of occupational stress, psychological disorders and sleep disorders among oil workers with different demographic characteristics.
| Variables | Group | Number | Occupational stress |
Z/χ2 | P | Mental disorders | χ2 | P | Sleep disorders | χ2 | P | ||
| Low | Moderate | High | |||||||||||
| Sex | Male | 671 | 71 (10.6) | 189 (28.2) | 411 (61.3) | 2.046 | 0.359 | 323 (48.1) | 0.071 | 0.790 | 344 (51.3) | 18.984 | <0.001 |
| Female | 470 | 38 (8.1) | 139 (29.6) | 293 (62.3) | 230 (48.9) | 302 (64.3) | |||||||
| Age group, years | ≤30 | 205 | 39 (19.0) | 54 (26.3) | 112 (54.6) | 48.291 | <0.001 | 76 (37.1) | 105.109 | <0.001 | 88 (42.9) | 20.025 | <0.001 |
| 30–45 | 619 | 66 (10.7) | 169 (27.3) | 384 (62.0) | 246 (39.7) | 362 (58.5) | |||||||
| >45 | 317 | 4 (1.3) | 105 (33.1) | 208 (65.6) | 231 (72.9) | 196 (61.8) | |||||||
| Educational level | High school and below | 859 | 62 (7.2) | 255 (29.7) | 542 (63.1) | 22.006 | <0.001 | 449 (52.3) | 20.134 | <0.001 | 487 (56.7) | 0.008 | 0.927 |
| Junior College and above | 282 | 47 (16.7) | 73 (25.9) | 162 (57.4) | 104 (36.9) | 159 (56.4) | |||||||
| Professional titles | No title | 184 | 17 (9.2) | 53 (28.8) | 114 (62.0) | 15.667 | 0.016 | 87 (47.3) | 1.096 | 0.778 | 117 (63.6) | 15.082 | 0.002 |
| Primary | 153 | 27 (17.6) | 41 (26.8) | 85 (55.6) | 73 (47.7) | 71 (46.4) | |||||||
| Secondary | 277 | 28 (10.1) | 79 (28.5) | 170 (61.4) | 129 (46.6) | 143 (51.6) | |||||||
| Senior | 527 | 37 (7.0) | 155 (29.4) | 335 (63.6) | 264 (50.1) | 315 (59.8) | |||||||
| Working years | <5 | 180 | 22 (12.2) | 51 (28.3) | 107 (59.4) | 98.105 | <0.001 | 70 (38.9) | 37.128 | <0.001 | 88 (48.9) | 26.568 | <0.001 |
| 5–15 | 332 | 71 (21.4) | 100 (30.1) | 161 (48.5) | 127 (38.3) | 159 (47.9) | |||||||
| >15 | 629 | 16 (2.5) | 177 (28.1) | 436 (69.3) | 356 (56.6) | 399 (63.4) | |||||||
| Type of work | Logging work | 81 | 6 (7.4) | 17 (21.0) | 58 (71.6) | 12.058 | 0.149 | 40 (49.4) | 31.324 | <0.001 | 30 (37.0) | 33.089 | <0.001 |
| Oil transportation | 126 | 14 (11.1) | 31 (24.6) | 81 (64.3) | 89 (70.6) | 60 (47.6) | |||||||
| Borehole operation | 395 | 31 (7.8) | 108 (27.3) | 256 (64.8) | 172 (43.5) | 261 (66.1) | |||||||
| Drilling | 124 | 13 (10.5) | 44 (35.5) | 67 (54.0) | 51 (41.1) | 73 (58.9) | |||||||
| Extract oil | 415 | 45 (10.8) | 128 (30.8) | 242 (58.3) | 201 (48.4) | 222 (53.5) | |||||||
| Shift | Fixed day shift | 354 | 59 (16.7) | 115 (32.5) | 180 (50.8) | 39.480 | <0.001 | 140 (39.5) | 16.343 | <0.001 | 160 (45.2) | 27.247 | <0.001 |
| Shift | 787 | 50 (6.4) | 213 (27.1) | 524 (66.6) | 413 (52.5) | 486 (61.8) | |||||||
| Marital status | Single | 223 | 33 (14.8) | 65 (29.1) | 125 (56.1) | 9.430 | 0.009 | 107 (48.0) | 0.260 | 0.872 | 119 (53.4) | 1.195 | 0.274 |
| Married | 918 | 76 (8.3) | 263 (28.6) | 579 (63.1) | 446 (48.6) | 527 (57.4) | |||||||
| Monthly income | ≤5,000 | 1000 | 94 (9.4) | 284 (28.4) | 622 (62.2) | 0.864 | 0.649 | 508 (50.8) | 17.646 | <0.001 | 567 (56.7) | 0.023 | 0.880 |
| >5,000 | 141 | 15 (10.6) | 44 (31.2) | 82 (58.2) | 45 (31.9) | 79 (56.0) | |||||||