Horowitz b2007.

Methods	See Horowitz a2007
Participants	See Horowitz a2007
Interventions	Broad category: IPT (for further information on intervention components, see Table 3) Manualised: yes Online: no Name of programme: IPT‐AST Number of sessions: 8 sessions Length of sessions: 90 minutes Intensity (total number of hours): 12 hours Duration of treatment period: 8 weeks Group size: 8 to 15 (median 11) Delivered by: students Fidelity: not assessed Type of comparison: TAU comprising normal health classes in which students were taught the standard wellness curriculum
Outcomes	See Horowitz a2007
Notes	See Horowitz a2007
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	See Horowitz a2007
Allocation concealment (selection bias)	High risk	See Horowitz a2007
Blinding (performance bias and detection bias) Subjects	High risk	See Horowitz a2007
Blinding (performance bias and detection bias) Assessors	Low risk	See Horowitz a2007
Incomplete outcome data (attrition bias) All outcomes	Low risk	See Horowitz a2007
Selective reporting (reporting bias)	Unclear risk	See Horowitz a2007
Other bias	Unclear risk	See Horowitz a2007
Implementation integrity	Unclear risk	See Horowitz a2007