Stordahl 2009.

Study characteristics
Methods	CCT 2‐arm parallel‐group design
Participants	Women at the completion of treatment for breast cancer Type of cancer: breast (n = 20, 100%) Total N randomized: 20 Total N analyzed: 20 N randomized to music group: 10 N randomized to control group: 10 N analyzed in music group: 10 N analyzed in control group: 10 Mean age: 48.35 years Sex: n = 20 (100%) females Ethnicity: n = 9 (45%) Latino, n = 6 (30%) white, n = 5 (25%) African‐American/Caribbean black Setting: outpatient Country: USA
Interventions	2 treatment conditions: Music therapy condition: music‐assisted relaxation Relaxation condition: relaxation directive Music selections provided: contemporary sedative music was paired with standard spoken relaxation directives Number of sessions: 4 Length of sessions: 20‐30 min Categorized as music therapy trial
Outcomes	Depression [Center for Epidimiologic Diseases ‐ Depression Scale (CES‐D)]: post‐test scores Mood (POMS ‐ Short Form): post‐test scores
Notes	—
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not reported
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Participants and personnel could not be blinded.
Blinding of outcome assessment (detection bias) Objective outcomes	Low risk	This study did not include objective measures.
Blinding of outcome assessment (detection bias) Subjective outcomes	High risk	Self‐report measures were used for subjective outcomes.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Not reported
Selective reporting (reporting bias)	Low risk	No indication of selective reporting
Other bias	Low risk	No indication of conflict of interest