Rowe 2007.

Methods	Allocation: randomised Blindness: not stated Study duration: 12 months Location: single centre Design: parallel Setting: not stated Country: USA Consent: written
Participants	Diagnosis: psychotic disorder, major mood disorder, alcohol‐use disorder, drug‐use disorder, other disorder N = 114 History: not stated Sex: men 78, women 36 Age: mean 39.8, SD 8.8 years Exclusion criteria: not stated
Interventions	Group 1: peer‐support + standard care group (n = 73). Content: standard service and peer support which included citizenship intervention plus valued‐roles projects. Consist of classes with topics related to social participation and community integration (citizenship classes), followed by projects designed to foster participants' acquisition of valued social roles (valued‐roles projects). Delivered by: peer mentor. Frequency: mean once weekly. Treatment duration: 4 months. Group 2: standard care (n = 41). Content: standard service, individual and group treatment with medication management, case management and jail diversion services Treatment duration: 4 months.
Outcomes	Unable to use Functioning: criminal justice involvement, alcohol use, drug use (skewed data)
Notes	Funding source: Yale University Institution for social and policy studies.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: "A total of 114 adults with serious mental illness participated in a 2×3 prospective longitudinal, randomised clinical trial with two levels of intervention." Comment: insufficient information to make judgement.
Allocation concealment (selection bias)	Unclear risk	Comment: author did not describe allocation concealment. Insufficient information to make judgement.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Comment: author did not describe blinding of participants and personnel. Insufficient information to make judgement.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Comment: author did not describe blinding of outcome assessment. Insufficient information to make judgement.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Quote: "the overall sample showed 23% attrition from time 1, with 20 participants missing the time 2 (six‐month) interview but returning for the time 3 (12‐month) interview and 19 participants missing the time 3 interview." Comment: moderate attrition rate.
Selective reporting (reporting bias)	Unclear risk	Comment: study protocol not available. Insufficient information to make judgement.
Other bias	Low risk	None noted.