Unadjusted and adjusted odds ratios (OR) for present and chronic symptom cases in relation to physical and psychosocial workplace factors, and personal characteristics
| Present symptom case | Chronic symptom case | |||
|---|---|---|---|---|
| Crude OR | Adjusted OR (95% CI) | Crude OR | Adjusted OR (95% CI) | |
| Physical workplace factors | ||||
| Hours per week with mouse in right hand | ||||
| 0–2.4 | 1 | 1 | 1 | 1 |
| 2.5–4 | 1.6 | 1.5 (0.6 to 3.6) | 1.5 | 1.2 (0.5 to 2.8) |
| 5–9 | 2.5 | 2.7 (1.3 to 5.6) | 2.6 | 2.7 (1.4 to 5.1) |
| 10–14 | 1.8 | 1.9 (0.9 to 4.0) | 1.9 | 2.2 (1.1 to 4.2) |
| 15–19 | 4.2 | 4.1 (2.0 to 8.2) | 3.6 | 3.8 (2.0 to 7.1) |
| 20–24 | 2.9 | 3.3 (1.6 to 7.0) | 3.0 | 2.9 (1.5 to 5.7) |
| 25–29 | 6.2 | 7.5 (3.4 to 16) | 4.9 | 5.8 (2.9 to 12) |
| ⩾30 | 5.9 | 7.3 (3.1 to 17) | 6.0 | 6.3 (2.9 to 14) |
| No arm support (mouse) | 1 | 1 | 1 | 1 |
| Arm support (mouse) <50% time | 1.0 | 1.1 (0.6 to 2.0)) | 1.0 | 1.2 (0.7 to 2.0) |
| Arm support (mouse) ⩾50% time | 0.7 | 1.1 (0.7 to 1.8) | 0.7 | 1.2 (0.8 to 1.9) |
| Abnormal mouse position | 0.7 | 0.6 (0.3 to 1.1) | 0.6 | 0.6 (0.4 to 1.1) |
| Keyboard time in hours per week | ||||
| 0–2.4 | 1 | 1 | 1 | 1 |
| 2.5–4 | 1.5 | 1.1 (0.6 to 2.2) | 1.1 | 0.9 (0.5 to 1.6) |
| 5–9 | 1.0 | 1.1 (0.6 to 2.1) | 0.8 | 1.0 (0.6 to 1.6) |
| 10–14 | 1.1 | 1.6 (0.8 to 3.1) | 0.6 | 0.8 (0.5 to 1.4) |
| 15–19 | 1.6 | 1.8 (0.9 to 3.7) | 1.1 | 1.3 (0.7 to 2.3) |
| ⩾20 | 1.5 | 2.9 (1.2 to 7.1) | 1.0 | 2.1 (0.9 to 4.5) |
| No arm support (keyboard) | 1 | 1 | 1 | 1 |
| Arm support (keyboard) <50% time | 0.7 | 1.5 (1.1 to 2.1) | 0.9 | 1.1 (0.8 to 1.6) |
| Arm support (keyboard) ⩾50% time | 1.2 | 1.0 (0.7 to 1.3) | 1.2 | 0.8 (0.6 to 1.1) |
| Abnormal keyboard position | 1.4 | 1.3 (0.9 to 1.8) | 1.5 | 1.6 (1.2 to 2.3) |
| Work chair not adjusted | 1.5 | 1.8 (0.9 to 3.6) | 1.2 | 1.5 (0.8 to 2.8) |
| Work table not adjusted | 0.8 | 0.7 (0.4 to 1.0) | 0.8 | 0.7 (0.5 to 1.0) |
| Not satisfied with workplace design | 1.9 | 2.0 (1.3 to 3.0) | 1.8 | 1.8 (1.2 to 2.6) |
| Psychosocial workplace factors | ||||
| High demands | 1.1 | 1.0 (0.7 to 1.4) | 1.2 | 1.1 (0.9 to 1.5) |
| Low control | 1.6 | 1.1 (0.8 to 1.5) | 1.4 | 1.1 (0.8 to 1.5) |
| Low social support | 1.6 | 1.3 (0.9 to 1.7) | 1.3 | 1.2 (1.0 to 1.6) |
| Time pressure | 1.6 | 1.4 (1.0 to 2.0) | 1.5 | 1.3 (1.0 to 1.7) |
| Personal characteristics | ||||
| Negative affectivity | 1.1 | 0.9 (0.6 to 1.4) | 1.4 | 1.3 (1.0 to 1.9) |
| Type A behaviour | 1.3 | 1.5 (1.0 to 2.2) | 1.4 | 1.4 (1.0 to 2.0) |
| Age (10 years increment) | 1.0 | 1.1 (0.9 to 1.3) | 1.1 | 1.1 (0.9 to 1.3) |
| Female gender | 2.3 | 2.2 (1.5 to 3.1) | 2.3 | 2.0 (1.4 to 2.7) |
| BMI <19 kg/m2 | 0.8 | 0.7 (0.3 to 1.7) | 0.7 | 0.7 (0.3 to 1.5) |
| BMI ⩾27 kg/m2 | 1.4 | 1.2 (0.7 to 2.0) | 1.2 | 0.9 (0.5 to 1.5) |
| Poor social network | 1.3 | 1.1 (0.7 to 1.7) | 1.3 | 1.2 (0.8 to 1.8) |
| High physical activity | 0.8 | 0.9 (0.7 to 1.2) | 0.9 | 1.1 (0.8 to 1.4) |
| Medical disorder | 1.4 | 1.7 (1.1 to 2.8) | 1.3 | 1.6 (1.0 to 2.5) |
| Pain started after accident | 1.5 | 1.5 (0.7 to 3.2) | 0.7 | 0.7 (0.3 to 1.8) |