Ganidagli 2005.

Methods	RCT 2‐arm parallel group design
Participants	Adult patients scheduled for surgical procedures Type of surgery: septorhinoplastic surgery Total N randomized:54 N randomized to music group: 28 N randomized to control group: 26 N analysed in music group: 25 N analysed in control group: 25 Mean age: 30 Sex: 21 (42%) females, 29 (58%) males Ethnicity: Not reported Setting: Inpatient Country: Turkey
Interventions	Two study groups: 1. Music group: listening to pre‐recorded music through headphone 2. Control group: listening to a blank cassette or CD through headphone Music provided: Patients brought their own music Number of sessions: 1 Length of sessions: 50 minutes Categorized as music medicine
Outcomes	Anxiety (Observer’s Assessment of Alertness/Sedation Scales, Bispectral Index): post‐test scores
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote: “they were assigned using a table of random numbers, to receive either music (music group) or no music (control group)"
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Blinding of participants was not possible. Personnel were blinded
Blinding of outcome assessment (detection bias) Subjective outcomes	Low risk	This study did not address any subjective outcomes
Blinding of outcome assessment (detection bias) Objective outcomes	Low risk	The outcome assessors were blinded
Incomplete outcome data (attrition bias) All outcomes	Low risk	Attrition rate: 7 %(n = 4). Three patients from the music group and one patient from the control group were excluded from the study because of technical problems related to the music player.
Selective reporting (reporting bias)	Low risk	No indication of selective reporting
Other bias	Low risk	No indication of other biases