Table 2 Intervention effects on social support at work, work engagement, and physical workload between the intervention and control group after three, six and 12 months of follow up
| Â | Control group | Intervention group | Â | Â | ||
|---|---|---|---|---|---|---|
|  | mean | (SD) | mean | (SD) | β | (95% CI)‡ |
Social support at work 1 | Â | Â | Â | Â | Â | Â |
Overall social support (8–32) |  |  |  |  |  |  |
Baseline | 24.0 | (3.4) | 24.3 | (2.5) | Â | Â |
3-months | 24.2 | (3.1) | 24.2 | (2.5) | 0.02 | (−0.61 0.65) |
6-months | 24.2 | (3.2) | 25.5 | (2.5) | 0.25 | (−0.40 0.90) |
12-months | 24.0 | (2.9) | 23.9 | (2.5) | −0.20 | (−0.56 0.45) |
overall effect |  |  |  |  | 0.03 | (−0.39 0.46) |
Co-worker support (range 4–16) |  |  |  |  |  |  |
Baseline | 12.2 | (1.7) | 12.4 | (1.4) | Â | Â |
3-months | 12.3 | (1.5) | 12.3 | (1.2) | −0.02 | (−0.33 0.30) |
6-months | 12.3 | (1.6) | 12.3 | (1.4) | 0.03 | (−0.29 0.35) |
12-months | 12.2 | (1.4) | 12.2 | (1.3) | −0.02 | (−0.35 0.30) |
overall effect |  |  |  |  | 0.00 | (−0.21 0.20) |
Supervisor support (range 4–16) |  |  |  |  |  |  |
Baseline | 11.8 | (2.0) | 12.0 | (1.7) | Â | Â |
3-months | 11.9 | (1.9) | 11.9 | (1.6) | 0.07 | (−0.34 0.48) |
6-months | 11.8 | (2.0) | 12.1 | (1.7) | 0.27 | (−0.15 0.69) |
12-months | 11.7 | (1.8) | 11.7 | (1.7) | −0.09 | (−0.51 0.33) |
overall effect |  |  |  |  | 0.09 | (−0.18 0.36) |
Work Engagement 1 | Â | Â | Â | Â | Â | Â |
Work engagement (1–6) |  |  |  |  |  |  |
Baseline | 4.3 | (0.8) | 4.3 | (0.8) | Â | Â |
3-months | 4.4 | (0.8) | 4.2 | (0.7) | −0.06 | (−0.22 0.11) |
6-months | 4.2 | (0.9) | 4.3 | (0.8) | 0.02 | (−0.15 0.19) |
12-months | 4.2 | (0.9) | 4.3 | (0.8) | 0.10 | (−0.07 0.27) |
overall effect |  |  |  |  | 0.02 | (−0.12 0.15) |
Subscale vigour (1–6) |  |  |  |  |  |  |
Baseline | 4.3 | (0.8) | 4.4 | (0.8) | Â | Â |
3-months | 4.4 | (0.8) | 4.3 | (0.7) | −0.04 | (−0.21 0.13) |
6-months | 4.2 | (0.8) | 4.3 | (0.8) | 0.06 | (−0.12 0.24) |
12-months | 4.3 | (0.9) | 4.4 | (0.8) | 0.04 | (−0.14 0.22) |
overall effect |  |  |  |  | 0.02 | (−0.19 0.15) |
Subscale absorption (1–6) |  |  |  |  |  |  |
Baseline | 4.1 | (1.0) | 4.0 | (1.0) | Â | Â |
3-months | 4.1 | (1.0) | 3.8 | (1.0) | −0.18 | (−0.38 0.02) |
6-months | 4.1 | (1.1) | 4.0 | (1.0) | −0.07 | (−2.00 0.52) |
12-months | 3.9 | (1.1) | 4.0 | (1.0) | −0.01 | (−0.22 0.19) |
overall effect |  |  |  |  | −0.09 | (−1.64 1.46) |
Subscale dedication (range 1–6) |  |  |  |  |  |  |
Baseline | 4.6 | (0.9) | 4.6 | (0.9) | Â | Â |
3-months | 4.6 | (0.9) | 4.5 | (0.8) | −0.01 | (−0.32 0.04) |
6-months | 4.5 | (1.0) | 4.5 | (0.9) | 0.02 | (−0.15 0.19) |
12-months | 4.3 | (1.0) | 4.5 | (0.9) | 0.22 | (−1.67 2.10) |
overall effect |  |  |  |  | 0.07 | (−0.08 0.22) |
Physical workload (1–5) 2 |  |  |  |  |  |  |
Baseline | 2.6 | (0.8) | 2.6 | (0.8) | Â | Â |
3-months | 2.7 | (0.8) | 2.8 | (0.8) | 0.09 | (−0.08 0.24) |
6-months | 2.5 | (0.7) | 2.7 | (0.9) | 0.18 | ( 0.01 0.34) |
12-months | 2.5 | (0.8) | 2.6 | (0.8) | 0.04 | (−0.13 0.21) |
overall effect |  |  |  |  | 0.10 | (−0.02 0.21) |