Qian 2015.

Methods	Allocation: randomised Blindness: not stated Study duration: 5 weeks Location: single centre Design: parallel Setting: community Country: China Consent: written
Participants	Diagnosis: schizophrenia N = 100 History: 4–13 years Sex: men 69, women 31 Age: mean 25.23, SD 8.51 years Exclusion criteria: serious physical disorder, brain organic disease
Interventions	Group 1: peer‐support + standard care group (n = 50). Content: peer support and psychoeducation. Delivered by: trained peer. Frequency: 5 weekly sessions. Treatment duration: 5 weeks. Group 2: standard care (n = 50). Content: psychoeducation. Treatment duration: 5 weeks.
Outcomes	Peer outcomes: quality of life for participant and peer supporter
Notes	Funding sources: not stated.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Comments: randomised.
Allocation concealment (selection bias)	Unclear risk	Comments: the author did not describe the blinding of participants and personnel. Insufficient information to make judgement.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Comment: the author did not describe the blinding of participants and personnel. Insufficient information to make judgement.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Comment: the author did not describe the blinding of outcome assessment. Insufficient information to make judgement.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Comments: all participants completed the trial.
Selective reporting (reporting bias)	Unclear risk	Comments: study protocol available. Insufficient data to make judgement.
Other bias	Low risk	None noted.