Jensen 1997.

Methods	RCT; 2 arms; assessed pre‐treatment, post‐treatment, 6 months, 18 months
Participants	End of treatment n = 59 Start of treatment n = 63 Sex: 63 F, 0 M (at start of treatment) Mean age = 43.4 (SD 8.4) Source = pain or rehabilitation clinic Diagnosis = non‐specific back or neck pain Mean years of pain = 4.2
Interventions	"Woman‐specific CBT" "Regular CBT"
Outcomes	Primary pain outcome: VAS pain intensity Primary disability outcome: Disability Rating Index Primary mood outcome: BDI depression Catastrophising outcome: RAI helplessness Pain intensity visual analogue scale Beck Depression Inventory (BDI) Anxiety visual analogue scale Disability Rating Index Health perception numerical rating scale Coping Strategies Questionnaire (CSQ) Rheumatoid attitudes index (helplessness)
Notes	CBT versus active, post‐treatment and follow‐up: analyses 1.1, 1.2, 1.3, 2.1, 2.2, 2.3 Yates quality scale: total quality = 16/35, design quality = 13/26, treatment quality =3/9
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Central randomisation using random numbers table
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)	High risk	Partially reported
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Assessors blind to treatment condition