Descriptive information of the physical, psychosocial, and time related factors at baseline (n = 523)
| Mean (SD*) | |
|---|---|
| *SD, standard deviation. | |
| †Range of score = 0–100; the higher the score, the lower the experience on that factor. | |
| Physical factors | |
| Trunk flexion between 20° and 45° (h/wk) | 4.5 (1.6) |
| Trunk flexion over 45° (h/wk) | 1.1 (0.6) |
| Lifting and carrying loads over 10 kg (min/wk) | 18.8 (16.1) |
| Psychosocial factors | |
| Decision authority† | 40.5 (19.9) |
| Skill discretion† | 41.8 (19.2) |
| Work demands† | 46.9 (16.2) |
| Time related factors | |
| Age (y) | 40.7 (9.7) |
| Years in service | 9.3 (6.9) |