Lu 2004.

Methods	Allocation: randomised. Blinding: no. Duration: 8 weeks. Setting: inpatients. Design: parallel. Country: China
Participants	Diagnosis: schizophrenia (CCMD‐2‐R). N = 112. Sex: male and female. Age: 18‐60 years. History: mean duration of illness ˜9.9 years, SD˜7.1 years.
Interventions	1. Social skills training + routine antipsychotic medication: training included targeted problem solving training ‐ breaking down complicated daily problems into small and simple parts, teaching patients through repeated explanation and demonstration to eventually solve the complex problems. Training to improve patients' cognitive skills (attention, planning) with the aim of gradually improving patient's social function. Training was 60 minutes per session and 2 sessions per week for 8 weeks (N = 56) 2. Routine antipsychotic medication only (N = 56)
Outcomes	Leaving the study early. General functioning: Morningside rehabilitation status scale (MRSS). Social functioning: Social Disability screening schedule (SDSS). Quality of Life: General well‐being schedule (GWB). Self‐esteem scale (SES).
Notes	In Chinese.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Randomisation method is not described.
Allocation concealment (selection bias)	Unclear risk	No information provided.
Blinding (performance bias and detection bias) All outcomes	High risk	Not stated.
Incomplete outcome data (attrition bias) All outcomes	Low risk	No incomplete outcome data.
Selective reporting (reporting bias)	High risk	Not all expected outcomes reported.
Other bias	Unclear risk	Protocol not available. Sample size not calculated.