Dellve 2011.

Methods	RCT
Participants	Female human service organisation workers (35 to 60 years old) on long‐term (60 days) sick leave and with chronic neck pain. Reduction in degree of working should be at least 50%; n = 73
Interventions	Myofeedback training: harness to muscle activity (EMG) from the upper trapezius muscles on the right and left sides; eight hours per week; n = 25; lost five Intensive strength training: two warm‐up movements, followed by four exercises for strengthening and coordinating upper extremities; five‐ to 10‐minute programme to be performed twice a day for six days/wk; n = 27; lost seven Control: n = 21 Intervention: one month; follow‐up: three months
Outcomes	Self‐reported (work ability, pain (VAS)) and laboratory‐observed data on health, pain, muscular activation and work ability
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Randomisation method is unclear
Allocation concealment (selection bias)	Unclear risk	Concealed randomisation is stated, but procedure is unclear
Blinding of participants?	Unclear risk	No mention of participant blinding
Blinding of caregivers?	High risk	One caregiver for all interventions, therefore not blinded
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Unclear blinding and outcome assessment
Incomplete outcome data (attrition bias) All outcomes ‐ <20% drop‐outs?	High risk	23/73 lost, > 20%
Incomplete outcome data (attrition bias) All outcomes ‐ ITT analysis performed?	High risk	No ITT analysis
Selective reporting (reporting bias)	Unclear risk	No protocol
Similarity of baseline characteristics?	Low risk	No differences
Co‐interventions avoided?	Unclear risk	Unclear
Compliance acceptable ?	Unclear risk	Unclear
Timing outcome assessment comparable?	Low risk	Timing comparable