White 1999.

Study characteristics
Methods	RCT 3‐arm parallel group design
Participants	Adults with confirmed diagnosis of MI Total N randomized:45 N randomized to music group: 15 N randomized to control group: 15 N randomized to quiet rest group: 15 (not included in this review) N analyzed in music group: 15 N analyzed in control group:15 Mean age: 63 years Sex: 7 (23%) women, 23 (67%) men Ethnicity: 23 (76.6%) white, 6 (20%) African‐American, 1 (3.4%) Hispanic Setting: inpatient Country: USA
Interventions	Two study groups: 1. Music group: listening to researcher‐selected music through earphones 2. Control group: standard care Music used: classical music (no further specifications) Number of sessions: 1 Length of session: 20 mins Categorized as music medicine
Outcomes	Anxiety (STAI): posttest HR, RR, SBP: posttest High frequency heart rate variability (HF HRV) (variability power)
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computer‐generated random number list (personal communication with author)
Allocation concealment (selection bias)	Low risk	Study recruiters were blind to allocation (personal communication with author)
Blinding of participants and personnel (performance bias) All outcomes	High risk	Blinding of participants was not possible. Personnel were not blinded
Blinding of outcome assessment (detection bias) Subjective outcomes	High risk	Self report measures were used for subjective outcomes
Blinding of outcome assessment (detection bias) Objective outcomes	High risk	Outcome assessors were not blinded
Incomplete outcome data (attrition bias) All outcomes	Low risk	No participant loss
Selective reporting (reporting bias)	Unclear risk	Not sufficient information available to make judgment
Other bias	Low risk	Supported in part by NSRA F 31; Marquette Medical Systems, Inc,; and Eta Nu Chapter of the Sigma Theta Tau International.