Parker 1988.

Methods	RCT; 3 arms; assessed at pre‐treatment, 6 months, 1 year
Participants	End of treatment n = 83 Start of treatment n = not given Sex: 3 F, 80 M Mean age = 60.6 (SD 7.7) Source = hospital Diagnosis = rheumatoid arthritis Mean years of pain = 11.4
Interventions	"cognitive behavioural pain management group" "attention placebo group" "control group" (TAU)
Outcomes	Primary pain outcome: no data available Primary disability outcome: no data available Primary mood outcome: no data available Catastrophising outcome: none Visual analogue scale pain McGill Pain Questionnaire pain dimensions Coping Strategies Questionnaire Arthritis Impact Measurement Scale (AIMS) Beck Depression Inventory Symptom Checklist‐90R psychological symptoms Hassles Scale Ways of Coping Questionnaire Arthritis Helplessness Index Disease status measures including walking speed
Notes	No data Yates quality scale: total quality = 17/35, design quality = 13/26, treatment quality = 4/9
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	“using a table of random numbers, subjects were assigned”
Allocation concealment (selection bias)	High risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	High risk	Attrition not reported
Selective reporting (reporting bias)	High risk	Partially reported
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not reported