Intervention effects (job rotation) on the secondary outcomes (mean and standard deviation) during 12-month follow-up of participants (n=491). Results of the linear mixed-effects models (MIXED). [95% CI=95% confidence interval.]
| Unadjusted group mean (SD) | Unadjusted within-group mean difference (baseline minus follow-up)* | Adjusted between-group mean difference (intervention minus control) | |||||
|---|---|---|---|---|---|---|---|
| Baseline | 12-month follow-up | ||||||
| Secondary outcome | Intervention (n=266) | Control (n=225) | Intervention (n=266) | Control (n=225) | Intervention (n=266) | Control (n=225) | |
| Musculoskeletal pain risk factors (0–150) | 72.5 (37.9) | 77.9 (36.3) | 84.1 (33.1) | 85.6 (33.9) | 11.9† (6.2 to 17.6) | 6.3† (1.0 to 11.7) | 4.6 (−3.1 to 12.2) |
| Psychosocial factors and fatigue (0–100) | 38.7 (18.1) | 37.3 (18.4) | 39.3 (18.0) | 40.2 (18.2) | 1.9 (−0.6 to 4.8) | 2.7† (0.1 to 5.3) | −1.5 (−4.9 to 2.0) |
| General health (0–100) | |||||||
| Physical domain | 64.2 (15.5) | 62.3 (15.5) | 58.0 (13.6) | 58.2 (14.3) | −7.0† (−9.7 to −4.2) | −4.3† (−6.9 to −1.7) | −2.2 (−5.8 to 1.4) |
| Psychological domain | 68.7 (15.5) | 67.8 (15.2) | 64.5 (12.3) | 63.5 (12.5) | −5.1† (−7.6 to −2.6) | −4.5† (−6.8 to −2.2) | −0.8 (−3.4 to 3.2) |
| Social domain | 68.4 (18.8) | 66.0 (20.0) | 61.7 (15.6) | 60.9 (14.9) | −6.7† (−9.9 to −3.4) | −5.6† (−8.9 to −3.4) | −1.5 (−5.9 to 2.9) |
| Environmental domain | 50.2 (13.7) | 46.3 (15.2) | 46.1 (10.4) | 42.2 (13.4) | −4.4† (−6.9 to −1.9) | −3.8† (−6.3 to −1.2) | −0.7 (−3.5 to 3.3) |
| Productivity (0–10) | 8.3 (1.6) | 8.4 (1.6) | 8.1 (1.7) | 7.5 (2.6) | −0.4† (−0.1 to −0.6) | −0.9† (−1.3 to −0.6) | 0.99 (−0.85 to 1.05) |
Results of linear mixed-effects models.
*The number of participants assessed at 12-month follow-up was 368 (200 intervention and 168 control).