Van Koulil 2010.

Methods	RCT; 2 arms; CBT: WLC; post‐treatment: 6‐month follow‐up
Participants	End of treatment: n = 152 Start of treatment: n = 158 Sex: 148 F, 10 M Mean age: 40.8 (SD 10.5) Mean years of pain: not given (< 5 years since diagnosis) Source = rheumatology clinics Diagnosis = fibromyalgia
Interventions	Tailored CBT with exercise training; waiting list control
Outcomes	Primary pain outcome: Pain IRGL Primary disability outcome: Mobility IRGL Primary mood outcome: Negative mood IRGL Catastrophising outcome: none Pain: 6 items of IRGL Disability: 7 mobility items of IRGL (reversed) Impact: Fibromyalgia Impact Questionnaire Negative mood: 6 items of IRGL Anxiety: 10 items of IRGL
Notes	CBT versus WLC: analyses 3.1, 3.2, 3.3, 4.1, 4.2, 4.3 2011 update search Yates quality scale: total quality 24/35, design quality 15/26, treatment quality 9/9
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	“randomized in clusters”
Allocation concealment (selection bias)	High risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Attrition reported; 2 differences between dropouts and completers
Selective reporting (reporting bias)	Low risk	Fully reported
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not reported