Intervention effects (job rotation) on the musculoskeletal symptoms during 12-month follow-up of participants (n=491)
| Frequency, n (%) | |||||
|---|---|---|---|---|---|
| Baseline | 12-month follow-up | ||||
| Region of musculoskeletal symptoms | Intervention (n=266) | Control (n=225) | Intervention (n=266) | Control (n=225) | p Value |
| Neck | 98 (36.8) | 89 (39.6) | 70 (26.3) | 73 (32.4) | 0.29 |
| Shoulders | 145 (54.5) | 120 (53.3) | 112 (42.1) | 97 (43.1) | 0.11 |
| Upper back | 120 (45.1) | 94 (41.8) | 77 (28.9) | 83 (36.9) | 0.85 |
| Elbows | 18 (6.8) | 18 (8.0) | 12 (4.5) | 23 (10.2) | 0.12 |
| Wrists/hands | 101 (38.0) | 88 (39.1) | 79 (29.7) | 79 (35.1) | 0.04† |
| Lower back | 104 (39.1) | 84 (37.3) | 65 (24.4) | 76 (33.8) | 0.73 |
| Hips/thighs | 30 (11.3) | 36 (16.0) | 22 (8.3) | 28 (12.4) | 0.65 |
| Knees | 50 (18.8) | 42 (18.7) | 36 (13.5) | 48 (21.3) | 0.19 |
| Ankles/feet | 75 (28.2) | 55 (24.4) | 43 (16.2) | 58 (25.8) | 0.52 |
Results of McNemar's test.
*The number of participants assessed at the 12-month follow-up was 368 (200 in the intervention group and 168 in the control group).
†Significant difference within groups (p<0.05). The intervention and control group showed improvement in symptoms after 12 months of intervention.