Ehrenborg 2010.

Methods	RCT; 2 arms; assessed at post‐treatment and 6‐month follow‐up
Participants	End of treatment: n = 62 Start of treatment: n = 65 Sex: 33 F, 29 M Age: mean = 39.4 (SD 11.1) Mean years of pain = 2.1 (SD 2.5) Source = outpatient rehabilitation unit Diagnosis = pain (neck and shoulder) after whiplash injury
Interventions	CBT rehabilitation plus EMG biofeedback versus CBT rehabilitation
Outcomes	Primary pain outcome: no data Primary disability outcome: Canadian Occupational Performance Measure Primary mood outcome: none Catastrophising outcome: none Canadian Occupational Performance Measure Multi‐dimensional Pain Inventory (Swedish)
Notes	CBT versus active, post‐treatment and follow‐up: analyses 1.2 and 2.2 2011 search Yates quality scale: total quality = 21/35, design quality = 17/26, treatment quality = 4/9
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	“Randomization was performed by casting a die after the participant’s acceptance: odd numbers for  treatment group ....”
Allocation concealment (selection bias)	High risk	Not reported
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	Therapists conducted assessments: statement that study not blinded