Argstatter 2006.

Methods
Participants
Interventions
Outcomes
Notes	See Table 8
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Method of randomisation not descibed.
Allocation concealment (selection bias)	Unclear risk	Not described.
Blinding (performance bias and detection bias) Subjective outcomes	High risk	Patients aware of group allocation.
Blinding (performance bias and detection bias) Objective outcomes	Unclear risk	Unclear whether measurements of physiological outcomes were automated.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Description of withdrawals and drop‐outs: 7 patients were excluded due to incomplete outcome data. Outcomes reported for > 80% of participants.
Selective reporting (reporting bias)	Unclear risk	Unknown if selective outcome reporting.
Protection from contamination?	Low risk	Music allocated to individuals via headphones.