|
Primary outcomes
|
|
Back pain severity (CPGQ)
|
characteristic pain intensity (0–100)
|
38.7 (36.2–41.2)
|
41.5 (39.3–43.6)
|
0.110
|
−0.16 [− 0.34 to 0.03]
|
|
disability points (0–6)
|
1.6 (1.4–1.8)
|
2.0 (1.8–2.2)
|
0.025
|
−0.24 [− 0.43 to − 0.05]
|
|
Health-related quality of life (SF-12)
|
physical component (0–100)
|
43.3 (42.0–44.5)
|
41.0 (39.9–42.0)
|
0.007
|
0.26 [0.07 to 0.45]
|
|
mental component (0–100)
|
46.9 (45.5–48.3)
|
46.7 (45.5–48.0)
|
0.855
|
0.02 [−0.21 to 0.17]
|
|
Secondary outcomes
|
|
Psychological distress (PHQ-4)
|
sum score (0–12)
|
2.7 (2.4–3.1)
|
3.2 (2.9–3.4)
|
0.040
|
−0.24 [− 0.42 to − 0.05]
|
|
Risk of chronifi-cation (STarT-G)
|
total score (0–9)
|
2.6 (2.3–2.8)
|
3.0 (2.8–3.3)
|
0.009
|
− 0.25 [− 0.44 to − 0.07]
|
|
Physical activitya
|
days per week with at least 10 min physical activity (0–7)
|
2.7 (2.5–2.9)
|
2.4 (2.2–2.6)
|
0.028
|
0.21 [0.03 to 0.40]
|
