Zhang 2014.

Methods	Allocation: randomised Blinding: not addressed Location: inpatients, China Length of follow‐up: 6 weeks
Participants	Diagnosis: schizophrenia (CCMD‐3) N = 79 Sex: not reported Age: not reported Included: not reported Excluded: not reported
Interventions	1. CBT group: N = 39 Content: psychoeducation and cognition modification Delivered by: three psychologists Frequency: not reported Treatment duration: 6 weeks 2. Standard care group: N = 40 Content: antipsychotics and nursing care Delivered by: not reported Frequency: not reported Treatment duration: 6 weeks
Outcomes	Mental state: insight (ITAQ scores) Satisfaction with treatment: leaving the study early Engagement with services: compliance with medication
Notes	*Participants in the CBT group also received the standard care intervention.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: "Participants were randomly assigned..." (p.117). Comments: insufficient information about the sequence generation process to permit judgement of 'Low risk' or 'High risk'
Allocation concealment (selection bias)	Unclear risk	Comments: The method of concealment was not described.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Comments: The author did not address this information. However, participants and personnel were not likely to be blinded because participants in the treatment group received CBT, and the control group only received standard care.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Comments: The method of blindness was not described.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Comments: Four cases withdrew from the study early. Two cases in each group. Low proportion of dropouts.
Selective reporting (reporting bias)	Low risk	Comments: All measured outcomes were reported.
Other bias	Low risk	Comments: none obvious