Table 3

Outcome of the mental training programme intervention

3 months after baseline15 months after baseline
Intention to treatPer protocolIntention to treatPer protocol
CFQ—total sum score
 Treatment group, mean19.519.016.814.3
 Control group, mean20.720.318.318.1
 Difference (95% CI)−1.1 (−4.1 to 1.9)−1.4 (−5.3 to 2.6)−1.5 (−6.1 to 3.1)−3.8 (−9.6 to 2.1)
Postexertional malaise—score
 Treatment group, mean2.72.42.31.7
 Control group, mean3.12.92.52.1
 Difference (95% CI)−0.4 (−0.9 to 0.1)−0.5 (−1.1 to 0.01)−0.2 (−0.8 to 0.5)−0.4 (−1.0 to 0.3)
BPI—total sum score
 Treatment group, mean11.310.712.512.9
 Control group, mean11.712.410.611.0
 Difference (95% CI)−0.4 (−2.9 to 2.2)−1.7 (−5.1 to 1.6)1.8 (−1.0 to 4.7)1.9 (−2.5 to 6.3)
KSQ—total sum score
 Treatment group, mean47.044.245.341.1
 Control group, mean46.247.943.344.6
 Difference (95% CI)0.8 (−8.1 to 9.7)−3.8 (−10.9 to 3.4)2.0 (−7.4 to 11.3)−3.5 (−14.4 to 7.4)
HADS—total sum score
 Treatment group, mean15.113.912.810.0
 Control group, mean15.114.213.512.4
 Difference (95% CI)−0.1 (−2.7 to 2.5)−0.3 (−3.8 to 3.2)−0.7 (−3.8 to 2.5)−2.4 (−6.0 to 1.3)
PedsQL—total average score
 Treatment group, mean65.969.869.075.9
 Control group, mean64.066.671.774.4
 Difference (95% CI)1.8 (−4.1 to 7.7)3.2 (−4.1 to 10.5)−2.7 (−11.6 to 6.2)1.4 (−9.2 to 12.0)
FDI—total sum score
 Treatment group, mean12.411.010.67.4
 Control group, mean12.912.810.410.7
 Difference (95% CI)−0.4 (−3.5 to 2.6)−1.8 (−5.5 to 1.9)0.2 (−4.3 to 4.6)−3.3 (−9.0 to 2.4)
Steps per day, n
 Treatment group, mean7138619871657540
 Control group, mean8296825780397782
 Difference (95% CI)−1158 (−2642 to 325)−2059 (−3698 to −421)−874 (−2800 to 1052)−242 (−2944 to 2460)
  • All analyses in the intention to treat columns are based on imputation of missing values based on the ‘last observation carried forward’ principle. Means and differences 3 and 15 months after baseline are estimated from the parameters of the general linear model. Model diagnostics were performed by visual inspection of residual plots.

  • BPI, Brief Pain Inventory; CFQ, Chalder Fatigue Questionnaire; FDI, Functional Disability Inventory; HADS, Hospital Anxiety and Depression Scale; KSQ, Karolinska Sleep Questionnaire; PedsQL, Pediatric Quality of Life Inventory.