Chen 2014.

Methods	Allocation: randomised Blinding: not reported Location: inpatients, China Length of follow‐up: 8 weeks
Participants	Diagnosis: schizophrenia with depression (CCMD‐3) N = 90 Sex: 44 M, 46 F Age: 24 ‐ 51 years Included: length of illness: not stated; achieved clinical response (the decrease rate of PANSS total score ≥ 50% or PANSS total score ≤ 60) after drug therapy Excluded: participants combined with mental retardation or drug abuse; participants with bipolar disorder; participants with severe physical disorder or severe brain organic disorder; suicidal attempts
Interventions	1. CBT group*: N = 45 Content: psychoeducation; help for participants to figure out their inappropriate beliefs and attitude; help for participants to recognise their cognitive problems and rebuild their personality and behaviour; psychoeducation to families Delivered by: not reported Frequency: 30 minutes each session; once per week for 8 weeks Treatment duration: 8 weeks 2. Standard care group: N = 45 Content: received usual nursing care and antipsychotics Treatment duration: 8 weeks
Outcomes	Mental state: depression (HAMD score) Satisfaction with treatment: leaving the study early Engagement with services: compliance to medication
Notes	* Participants in 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.85). 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 method of blindness was not described. It was likely that the blinding could have been broken, because participants in the treatment group received CBT.
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	Unclear risk	Comments: Eight participant from the CBT group and seven participants from the antipsychotic and nursing group failed to complete the trial. No reasons were reported.
Selective reporting (reporting bias)	Low risk	Comments: All measured outcomes were reported.
Other bias	Low risk	Comments: none obvious