Pinzone 1998.

Methods	RCT. Participants randomly assigned to intervention or control
Participants	152 undergraduate introductory psychology students (72% aged 18‐20 years, 28% aged > 21 years; 59 males, 93 females) from 2 universities in the Midwest, USA
Interventions	Intervention: information of statistics, how to be safe, discussion of cases of rape and rape myth acceptance worksheets delivered by graduate psychology student facilitators. The duration of the intervention is unclear. 76 students Control: received a sexually transmitted disease prevention programme. 75 students
Outcomes	Attitudes towards rape as measured by Rape Myth Acceptance Scale, Rape Empathy Scale, Attitudes Toward Women Scale and Acquaintance Rape Scenarios
Follow‐up	1 week post‐test
Notes	‐
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Participants were "randomly assigned"
Allocation concealment (selection bias)	Unclear risk	Not stated
Incomplete outcome data (attrition bias) All outcomes	Low risk	Attrition rate: 10% (15/152). Unlikely to have affected results
Selective reporting (reporting bias)	Low risk	All outcomes reported fully (number of participants, means and SDs)
Blinding of participants and personnel (performance bias) All outcomes	High risk	Blinding not possible. Facilitators received some training but no mention of any monitoring to ensure adherence to protocol
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not stated