Evers 2002.

Methods	RCT; 2 arms; assessed at pre‐treatment, post‐treatment, 6 months follow‐up
Participants	End of treatment n = 59 Start of treatment n = 64 Sex: 42 F, 17 M Mean age = 54.1 (SD 11.4) Source = rheumatology clinic Diagnosis = rheumatoid arthritis Mean years of pain = 3.1
Interventions	"Tailor made CBT" "Treatment as usual"
Outcomes	Primary pain outcome: IRGL Pain Primary disability outcome: IRGL Functional Disability (Composite Z score) Primary mood outcome: BDI depression Catastrophising outcome: Illness Cognitions ‐ Helplessness Disease Activity Invloed van Reuma op Gezondheid en Leefwijze (IRGL): Functional Disability Invloed van Reuma op Gezondheid en Leefwijze (IRGL): Pain Invloed van Reuma op Gezondheid en Leefwijze (IRGL): Anxiety Invloed van Reuma op Gezondheid en Leefwijze (IRGL): Perceived support Social network Illness Cognitions: Helplessness Illness Cognitions: Acceptance Active Coping with Pain Passive Coping with pain Active Coping with Stress Passive Coping with Stress Fatigue Beck Depression Inventory Negative Mood (ZwartSpooren) Medication compliance
Notes	CBT versus TAU, post‐treatment and follow‐up: analyses 3.1, 3.2, 3.3, 4.1, 4.2, 4.3 Yates quality scale: total quality = 25/35, design quality = 18/26, treatment quality = 7/9
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Random numbers
Allocation concealment (selection bias)	Low risk	“previously determined”
Incomplete outcome data (attrition bias) All outcomes	Low risk	Attrition fully reported
Selective reporting (reporting bias)	Low risk	Fully reported
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not reported