Hammond 2001.

Methods	RCT; 2 arms; assessed at pre‐treatment, post‐treatment, 1 year
Participants	End of treatment n = 121 Start of treatment n = 127 Sex: 97 F, 30 M Mean age = 50.5 (SD 10.6) Source = rheumatology clinic Diagnosis = rheumatoid arthritis (hand) Mean years of pain = 1.6
Interventions	"Joint protection arthritis education" "Standard arthritis education"
Outcomes	Primary pain outcome: none available Primary disability outcome: AIMS2 activities of daily living Primary mood outcome: none available Catastrophising outcome: RAI helplessness Adherence to joint protection Hand pain visual analogue scale Overall pain visual analogue scale Tender count (28 joints) Swollen joint count (28 joints) Early morning stiffness Grip strength Hand joint alignment Arthritis Impact Measurement Scale (AIMS) 2: ADL Arthritis Impact Measurement Scale (AIMS) 2: upper limb function Arthritis Impact Measurement Scale (AIMS) 2: lower limb function Arthritis Impact Measurement Scale (AIMS) 2: current health status Arthritis Self Efficacy (pain) Arthritis Self Efficacy (other) Rheumatoid attitude index (helplessness) Rheumatoid attitude index (internality) Satisfaction with health
Notes	CBT versus active, post‐treatment and follow‐up: analyses 1.2, 2.2 Yates quality scale: total quality = 18/35, design quality = 15/26, treatment quality = 3/9
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	“allocated randomly”
Allocation concealment (selection bias)	Low risk	Sealed envelopes prepared in advance
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	Low risk	Independent assessor