Hu 2014.

Methods	Allocation: randomised Blinding: no blinding Location: inpatients, China Length of follow‐up: 6 months
Participants	Diagnosis: schizophrenia (CCMD‐3) N = 80 Sex: 40 M, 40 F Age: mean ˜ 33.98 years, SD ˜ 8.13 years Included: length of illness: mean ˜ 2.73 years, SD ˜ 1.06 years; length of illness less than 5 years; length of hospitalisation more than 6 months, age 20‐50 years old Excluded: severe physical disorder
Interventions	1. CBT group*: N = 40 Content: The cognitive behavioural therapy included wrong behaviour correction, relaxation, etc. Delivered by: not reported Frequency: one‐hour CBT, once per week Treatment duration: not reported 2. Standard care group: N= 40 Content: antipsychotics Delivered by: not reported Frequency: not reported Treatment duration: not reported
Outcomes	Functioning: intelligence (WAIS‐RC scores) Unable to use: Verbal intelligence and performance intelligence measured by WAIS‐RC ‐ item scores within a subscale
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.8). Comments: insufficient information to make judgement
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: no attrition
Selective reporting (reporting bias)	Low risk	Comments: Ameasured outcomes were reported.
Other bias	Low risk	Comments: none obvious