Table 2.
Secondary outcomes over time; quality of life, work ability and work limitations from baseline up to 12 months follow up, specified by intervention and control groups
| T0-baseline mean (SD) | T1–3 months mean (SD) | p value | T2–6 months mean (SD) | P value | T3–9 months mean (SD) | P value | T4–12 months mean (SD) | p value | p value LMM analyses | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Intervention | Control | Intervention | Control | Intervention | Control | Intervention | Control | Intervention | Control | Group | Time | Randomization-group* time | |||||
| Quality life | |||||||||||||||||
| PCS | 46.6 (10.0) | 46.7 (9.9) | 44.6 (11.2) | 40.2 (9.9) | 44.8 (10.7) | 40.8 (12.0) | 46.9 (8.3) | 43.6 (10.9) | 47.7 (9.5) | 44.8 (11.1) | 0.09 | 0.00 | 0.59 | ||||
| MCS | 44 (9.9) | 45.3 (9.8) | 46.8 (9.8) | 45.3 (9.2) | 46.2 (10.7) | 49.4 (8.3) | 47.6 (8.8) | 46.8 (10.4) | 47.7 (9.7) | 50.8 (7.5) | 0.45 | 0.00 | 0.13 | ||||
| Work ability | 5.1 (3.0) | 5.3 (3.2) | 5.7 (2.8) | 4.1 (2.9) | 5.4 (2.8) | 4.5 (3.2) | 6.5 (2.2) | 5.5 (2.7) | 6.5 (2.5) | 6.1(2.1) | 0.14 | 0.00 | 0.15 | ||||
| Work limitation** | – | – | 13.3 (10.9) | 23.5 (17.8) | 0.05 | 15.8 (19.3) | 19.2 (16.0) | 0.55 | 17.7 (15.3) | 16.7 (15.5) | 0.83 | 17.2 (15.8) | 16.7 (14.1) | 0.90 | 0.33 | 0.01 | 0.01 |
| Time | – | – | 24.8 (26.3) | 31.1 (24.8) | 17.8 (23.3) | 18.2 (21.6) | 22.4 (24.5) | 15.6 (20.6) | 21.4 (24.3) | 21.7 (23.6) | 0.75 | 0.00 | 0.11 | ||||
| Physical | – | – | 4.3 (8.3) | 8.8 (14.0) | 9.9 (12.8) | 22.1 (32.2) | 25.2 (34.5) | 19.1 (25.9) | 14.3 (27.1) | 13.4 (16.9) | 0.51 | 0.05 | 0.14 | ||||
| Mental-interpersonal | – | – | 12.1 (11.3) | 23.5 (17.1) | 0.03 | 14.6 (21.8) | 18.0 (16.4) | 0.59 | 14.5 (17.4) | 14.8 (14.6) | 0.96 | 14.9 (17.2) | 14.5 (12.1) | 0.93 | 0.34 | 0.00 | 0.02 |
| Output | - | - | 11.9 (13.4) | 25.1 (22.0) | 0.04 | 19.0 (22.7) | 19.0 (20.0) | 0.99 | 14.4 (17.0) | 19.2 (19.4) | 0.38 | 18.6 (19.7) | 18.1 (15.4) | 0.92 | 0.42 | 0.01 | 0.01 |
Factors with a significant result are highlighted in bold
*Due to missing values numbers approach the total N
**Work limitations questionnaire was not applicable at baseline. The questions were filled out when participant was returned to work, therefore the numbers varied over time: T1 N = 35 (I = 19/C = 16) / T2 N = 39 (I = 20/ C = 19) / T3 N = 45 (I = 24/C = 21) / T4 N = 53 (I = 28/C = 25)