Wang 2013.

Methods	Allocation: randomised. Blindness: unknown. Duration: 3 months. Design: parallel group.
Participants	Diagnosis: chronic schizophrenia (CCMD‐3). History: mean 13.6 years, SD 1.7 years. N = 62. Age: mean 36.7 years, SD 9.8. Sex: 39 M, 23 F. Setting: inpatients.
Interventions	1. Group and individual music therapy, including active and receptive methods, improvisation, musical appreciation, song singing, and rhythm training in addition to standard care. 3 sessions per week for three months (36 sessions in total); no information about duration of sessions. N = 31. 2. Standard care. N = 31.
Outcomes	Behaviour: Nurses' Observation Scale for Inpatient Evaluation (NOSIE; Honigfeld 1965).
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	No details given.
Allocation concealment (selection bias)	Unclear risk	No details given.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Due to the nature of the intervention it was not possible to blind those who received music therapy or those who delivered it.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No details given
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No information
Selective reporting (reporting bias)	Unclear risk	No study protocol available. All outcome measures described in the study were considered in the analyses
Other bias	Unclear risk	Adequate music therapy method: unclear. Adequate music therapy training: limited (music therapy was conducted by a nurse). No personal, financial, or any other interests producing bias could be found.