Table 3.
Results from the other outcome.
| Group and scale | Baseline | First follow-up | Second follow-up | Between-group difference at follow-up | Time effect, P value | |||
| First follow-up | Second follow-up | |||||||
| Heaviest lift last week, 0-10 scale (95% CI) | ||||||||
| Intervention | 6.7 (6.1 to 7.2) | 6.8 (6.2 to 7.4) | 6 (5.3 to 6.7) | 0.2 (0.6 to 0.1) | −0.1 (−1 to 0.8) | .52 | ||
| Control | 6.2 (5.7 to 6.6) | 6.5 (6 to 7) | 6.1 (5.5 to 6.6) | —a | — | — | ||
| General fatigue after a typical working day, 5-point scale (not tired, a little tired, tired, very tired, and exhausted) converted to 0-100 (95% CI) | ||||||||
| Intervention | 41.1 (37.2 to 45) | 40.8 (36.6 to 45) | 35.6 (31 to 40.3) | −6.1 (−11.7 to −0.5) | −11.2 (−17.4 to −5) | .001 | ||
| Control | 39.4 (36.2 to 42.5) | 46.9 (43.4 to 50.4) | 46.8 (42.9 to 50.7) | — | — | — | ||
| How physically strenuous do you usually perceive your current work?, Borg CR10 scaleb (95% CI) | ||||||||
| Intervention | 4.8 (4.2 to 5.3) | 4.4 (3.9 to 5) | 5 (4.4 to 5.7) | −0.4 (−1.1 to 0.4) | 0.5 (−0.3 to 1.4) | .10 | ||
| Control | 4.3 (3.9 to 4.8) | 4.8 (4.3 to 5.3) | 4.5 (3.9 to 5) | — | — | — | ||
| How much influence do you have on your work, 5-point scale (very much, much, some, little, very little) converted to 0-100 (95% CI) | ||||||||
| Intervention | 59.6 (56.6 to 62.5) | 60.4 (57.3 to 63.6) | 58.9 (55.4 to 62.5) | 5.6 (1.5 to 9.8) | −0.1 (−4.8 to 4.6) | .04 | ||
| Control | 60.3 (58 to 62.7) | 54.8 (52.2 to 57.4) | 59 (56 to 62) | — | — | — | ||
| Do you wish more influence on your work, 2-point scale (yes or no) converted to 0-100 (95% CI) | ||||||||
| Intervention | 39.3 (29.6 to 49) | 49.4 (39 to 59.7) | 48.7 (37.3 to 60.2) | −3.9 (−17.6 to 9.7) | 0.1 (−15.3 to 15.4) | .85 | ||
| Control | 44.1 (36.3 to 51.9) | 53.3 (44.7 to 61.9) | 48.7 (38.9 to 58.5) | — | — | — | ||
aNot applicable.
bBorg CR10: Borg category ratio 10 scale.