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Table 1

Baseline values of sex, age and outcome measures. Additional baseline characteristics are shown in Additional File 5, Supplementary Table 1

Intervention group (N = 99)Control group (N = 100)
Sex, boys, n (%)45 (45%)40 (40%)
Age (mean, SD)10.9 (2.1)10.7 (2.0)
Number of days/weeka (mean, SD)2.8 (1.4)2.8 (1.5)
Pain intensitya (NRS) (mean, SD)5.2 (1.4)5.3 (1.4)
Medicationb (mean, SD)0.5 (0.3)0.4 (0.4)
awithin a 4-week period at baseline, bproportion of weeks with medication use