Table 6 Multivariable analysis of the psychosocial predictors of work-related musculoskeletal disorders
Psychosocial factors | Self-reported WRMSDs in the past 12 months (%) | Unadjusted Model | Adjusted model | |||
|---|---|---|---|---|---|---|
Yes (n = 49) | No (n = 147) | PR | [95% CI] | PR | [95% CI] | |
Age in years | ||||||
  < 30 | 9 (24.3) | 28 (75.7) | 1 |  |  | 1 |
 30–34 | 12 (22.2) | 42 (77. 8) | 0.91 | [0.43, 1.95] |  | 0.64 (0.29, 1.42) |
 35–39 | 8 (16.7) | 40 (83.3) | 0.69 | [0.29, 1.61] |  | 0.56 (0.22, 1.44) |
  ≥ 40 | 20 (35.1) | 37 (64.9) | 1.44 | [0.74, 2.82] |  | 1.04 (0.53, 2.03) |
Level of education | ||||||
 Primary | 5 (29.4) | 12 (70.6) | 1 |  |  |  |
 Secondary | 18 (21.7) | 65 (78.3) | 0.74 | [0.32, 1.72] |  |  |
 Tertiary | 24 (25.5) | 70 (74.5) | 0.87 | [0.38, 1.96] |  |  |
Experience in mining sector | ||||||
 1–5 years | 29 (20.4) | 113 (79.6) | 1 |  |  | 1 |
  > 5 years | 20 (37.0) | 34 (63.0) | 1.81 | [1.13, 2.92] * |  | 1.52 (0.85, 2.74) |
Job demands | ||||||
 High | 17 (73.9) | 6 (26.1) | 1 |  | 1 |  |
 Low | 32 (18.5) | 141 (81.5) | 0.25 | [0.17, 0.37] *** | 0.18 | [0.08, 0.44] * |
Job insecurity | ||||||
 High | 20 (30.8) | 45 (69.2) | 1 |  |  |  |
 Low | 29 (22.1) | 102 (77.9) | 0.72 | [0.44, 1.17] |  |  |
Job control | ||||||
 Yes | 12 (38.7) | 19 (61.3) | 1 |  |  |  |
 No | 37 (22.4) | 128 (77.6) | 0.58 | [0.34, 0.98] |  |  |
Work relationship | ||||||
 Good | 15 (27.3) | 40 (72.7) | 1 |  |  |  |
 Bad | 34 (24.1) | 107 (75.9) | 0.88 | [0.52, 1.49] |  |  |
Mental state | ||||||
 Not normal | 7 (38.9) | 11 (61.1) | 1 |  |  | 1 |
 Normal | 42 (23.6) | 136 (76.4) | 0.61 | [0.32, 1.15] |  | 0.61 (0.30, 1.23) |