Jensen 2001.

Methods	RCT; 4 arms; assessed at pre‐treatment, post‐treatment, 6 months, 18 months, 3 years
Participants	End of treatment n = 186 Start of treatment n = 214 Sex: 117 F, 93 M Mean age = 43.3 (SD 10.4) Source = pain or rehabilitation clinic Diagnosis = mixed (mostly chronic low back pain) Mean years of pain = 2.7
Interventions	"CBT" "Behavioural medicine rehabilitation" "Behaviourally orientated physical therapy" (BT) "Treatment as usual"
Outcomes	Primary pain outcome: SF36 pain (reversed) Primary disability outcome: SF36 physical function (reversed) Primary mood outcome: SF36 mental health (reversed) Catastrophising outcomes: none Short Form 36 Pain Short Form 36 Physical Function Short Form 36 Mental Health
Notes	CBT versus TAU, post‐treatment and follow‐up (6 months): analyses 3.1, 3.2, 3.3, 4.1, 4.2, 4.3 BT versus TAU, post‐treatment and follow‐up (6 months): analyses 7.1, 7.2, 7.3, 8.1, 8.2, 8.3 Baseline N used as N unavailable for post‐treatment and follow‐up results Yates quality scale: total quality = 27/35, design quality = 20/26, treatment quality =7/9
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Shuffled sealed envelopes
Allocation concealment (selection bias)	Low risk	Sealed envelopes; procedure by researchers blind to participant screening
Incomplete outcome data (attrition bias) All outcomes	High risk	Partially reported; differential attrition; no test of differences
Selective reporting (reporting bias)	Low risk	Fully reported
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Data gathered by research team