Ma 2011.

Methods	RCT; simple computer‐based randomisation
Participants	Daily computer users with a history of computer‐related neck and shoulder discomfort; n = 72
Interventions	Biofeedback: portable biofeedback, two hours daily for two weeks; n = 15 Exercise: standardised exercise programme with stretching and strengthening exercises using Thera‐band, 20 minutes four times a day; n = 15 Passive treatment: interferential therapy (20 minutes) and hotpacks 15 minutes two times per week; n = 15 Control: standard educational booklet; n = 15 Intervention period: six weeks, follow‐up at six months
Outcomes	Pain (VAS), disability (NDI)
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Simple computer‐based randomisation
Allocation concealment (selection bias)	Unclear risk	Unclear
Blinding of participants?	Unclear risk	Unclear
Blinding of caregivers?	Unclear risk	Unclear
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Unclear
Incomplete outcome data (attrition bias) All outcomes ‐ <20% drop‐outs?	High risk	Dropout at follow‐up > 20%
Incomplete outcome data (attrition bias) All outcomes ‐ ITT analysis performed?	High risk	No ITT
Selective reporting (reporting bias)	Unclear risk	No protocol
Similarity of baseline characteristics?	Low risk	Baseline similarity
Co‐interventions avoided?	Low risk	Co‐interventions avoided
Compliance acceptable ?	Unclear risk	Unclear compliance
Timing outcome assessment comparable?	Low risk	Timing comparable