Intention-to-treat analysis of the continuous secondary outcomes
| Secondary outcomes | 6 months | P value | 12 months | P value |
| Risk of chronicity (0–100) | 8.07 (2.03 to 14.11) | 0.009 | 6.11 (0.09 to 12.12) | 0.047 |
| No of pain sites (1–9) | 0.53 (–0.13 to 1.18) | 0.117 | 0.09 (–0.49 to 0.66) | 0.765 |
| Stress (0–42) | 1.36 (–2.25 to 4.98) | 0.457 | 2.33 (–1.51 to 6.18) | 0.232 |
| Fear of physical activity (0–24) | 1.71 (–0.57 to 4.00) | 0.140 | 1.92 (–0.32 to 4.17) | 0.093 |
| Coping (0–30) | −1.91 (−3.90 to 0.08) | 0.060 | −2.89 (–4.96 to –0.82) | 0.006 |
| Pain self-efficacy (0–60) | −6.66 (–10.93 to –2.39) | 0.002 | −5.99 (–10.52 to –1.46) | 0.010 |
| General health (0–13) | 2.29 (0.33 to 4.24) | 0.022 | 1.91 (0.19 to 4.01) | 0.075 |
| Socioeconomic status (0–100) | −11.18 (–16.38 to –5.99) | <0.001 | −9.42 (–15.50 to –3.35) | 0.003 |
Mean difference (95% CI) from linear mixed models including all three time points, controlling for within group effects (random effect) and location (fixed effect).