| Baseline | 24 m post | Baseline | 24 m post | Within group | ||
---|---|---|---|---|---|---|---|
M (SD) | M (SD) | M (SD) | M (SD) | p / SRM | p / SRM | ||
IG (N = 189) | CG (N = 255) | IG | KG | ||||
Back pain Severity (CPGQ) | characteristic pain intensity (0–100%) | 46.3 (19.1) | 39.9 (21.8) | 44.3 (20.4) | 40.6 (22.2) | < 0.001 / 0.32 | 0.001 / 0.21 |
disability points (0–6) | 2.6 (2.1) | 1.8 (2.1) | 2.2 (2.2) | 1.9 (2.1) | < 0.001 / 0.37 | 0.005 / 0.18 | |
Health-related quality of life (SF-12) | physical component (0–100) | 37.6 (9.2) | 42.3 (10.1) | 40.5 (11.1) | 41.7 (10.8) | < 0.001 / -0.48 | 0.058 / –0.12 |
mental component (0–100) | 46.5 (12.3) | 47.2 (10.3) | 44.5 (12.1) | 46.5 (12.2) | 0.384 / –0.06 | 0.004 / –0.18 | |
Psychological distress (PHQ-4) | sum score (0–12) | 3.4 (2.9) | 2.8 (2.7) | 3.4 (2.8) | 3.1 (2.6) | < 0.001 / 0.21 | 0.076 / 0.11 |
Risk of chronifi-cation (STarT-G) | total score (0–9) | 3.7 (2.2) | 2.8 (2.3) | 3.1 (2.3) | 2.9 (2.3) | < 0.001 / 0.38 | 0.077 / 0.11 |
Physical activitya | days per week with at least 10 min physical activity (0–7) | 2.2 (1.6) | 2.6 (1.6) | 2.5 (1.8) | 2.5 (1.7) | < 0.001 / –0.28 | 1.0 / 0.0 |