Table 2 Changes in work ability-related factors. Within-group changes after ten weeks and nine months compared with baseline.
| Â | Baseline | p 1 | 10-week follow-up | 9-month follow-up | p 2 | p 3 |
|---|---|---|---|---|---|---|
Work ability index (WAI) (7–49) |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 28 (17–47) 38 (16–49) | 0.023 | 31 (20–49) 39.5 (16–49) | 34 (20–48) 40.5 (17–49) | 0.574 0.896 | 0.028 0.983 |
1. WA relative to lifetime best (0–10) |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 5 (0–10) 7 (0–10) | 0.063 | 6 (1–10) 8 (0–10) | 7 (0–10) 8 (0–10) | 0.290 1.000 | 0.129 0.833 |
2a. WA/physical demands (1–5) |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 3 (1–5) 4 (2–5) | 0.008 | 3 (2–5) 4 (1–5) | 3 (2–5) 4 (1–5) | 0.021 0.405 | 0.012 0.265 |
2b.WA/mental demands (1–5) |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 3 (2–5) 4 (1–5) | 0.016 | 3 (2–5) 4 (1–5) | 3 (2–5) 4 (2–5) | 0.206 1.000 | 0.052 0.808 |
3.Diagnosed diseases (1–7) |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 5 (2–7) 5 (4–7) | 0.501 | 5 (2–7) 5 (3–7) | 5 (3–7) 6 (3–7) | 0.458 0.366 | 0.408 0.458 |
4. Work impairment (1–6) |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 2 (1–6) 4.5 (1–6) | 0.042 | 4 (1–6) 5 (1–6) | 4 (1–6) 4.5 (1–6) | 0.047 0.120 | 0.119 0.809 |
5. Sickness absence (1–5) |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 2 (1–5) 4.5 (1–5) | 0.000 | 2 (1–5) 4 (1–5) | 3 (1–5) 4 (1–5) | 0.705 0.248 | 0.058 0.250 |
6. Belief of work ability (1,4,7) | Â | Â | Â | Â | Â | Â |
Self-efficacy group Ergonomic group | 7 (1–7) 7 (1–7) | 0.858 | 4 (1–7) 4 (1–7) | 7 (1–7) 7 (1–7) | 0.102 0.564 | 0.655 0.046 |
7. Psychological well-being (1–4) |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 3 (2–4) 3 (1–4) | 0.573 | 3 (1–4) 3 (1–4) | 3 (2–4) 3 (1–4) | 0.782 0.739 | 0.052 0.100 |
Physical strain in work (6–20) * |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 14 (9–18) 12 (6–15) | 0.003 | 14 (9–17) 12 (6–16) | 15 (7–17) 12 (6–16) | 0.130 0.459 | 0.279 0.044 |
Coping in relation to work | Â | Â | Â | Â | Â | Â |
1. Problem-focused coping (0–100) |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 75 (50–100) 75 (50–100) | 0.596 | 75 (50–100) 75 (50–100) | 88 (50–100) 75 (38–100) | 0.672 0.236 | 0.351 0.714 |
2. Selective coping (0–100) |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 38 (0–100) 38 (0–75) | 0.556 | 38 (0–88) 44 (0–62) | 38 (0–75) 50 (12–75) | 0.420 0.484 | 0.174 0.109 |
3. Resigning coping (0–100) * |  |  |  |  |  |  |
Self-efficacy group Ergonomic group | 25 (0–88) 38 (0–62) | 0.828 | 25 (0–88) 38 (0–75) | 25 (0–50) 38 (0–62) | 0,138 0.541 | 0.060 0.542 |