De Souza 2008.

Methods	RCT; 2 arms; assessed at pre‐treatment, post‐treatment, 4 months, 12 months
Participants	End of treatment n =  55 Start of treatment n = 60 Sex: 60 F, 0 M Mean age =  49.6 (SD 7.0) Source = not stated Diagnosis = fibromyalgia Mean years of pain = 12.4
Interventions	"Interactional School of Fibromyalgia" "Control"
Outcomes	Primary pain outcome: MPI pain severity Primary disability outcome: MPI interference with daily activity Primary mood outcome: none Catastrophising outcome: none 1. VAS pain (pain diary) 2. MPI pain severity 3. MPI pain interference daily activity 4. MPI control over pain 5. MPI mood 6. MPI family and social support 7. VAS suffering (pain diary) 8. VAS ability to do daily activity (pain diary)
Notes	December 2009 search No data Yates quality scale: total quality = 13/35, design quality = 10/26, treatment quality = 3/9
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	“randomly assigned”
Allocation concealment (selection bias)	High risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	High risk	Attrition partially reported; no test for differences
Selective reporting (reporting bias)	Low risk	Fully reported
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not reported