Gidycz 2001.

Methods	RCT. Participants randomly assigned to the intervention or control
Participants	762 female introductory psychology students (aged 18‐21 years) at 2 universities, USA
Interventions	Intervention: Ohio University's Sexual Assault Risk Reduction Project: a multi‐media, interactive programme including presentation, videos, role play and discussion. The intervention was delivered as a single 3‐hour session by graduate students who had received training. 395 students Control: no intervention. 357 students
Outcomes	Episodes of sexual victimisation, dating behaviours, sexual communication and rape empathy as measured by the Rape Empathy Scale, Dating Behaviour Survey, Sexual Communication Survey and Sexual Experiences Survey
Follow‐up	2 and 6 months post‐intervention
Notes	‐
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Individuals were "randomly assigned"
Allocation concealment (selection bias)	Unclear risk	Not stated
Incomplete outcome data (attrition bias) All outcomes	Low risk	Attrition at 2‐month follow‐up very low: 2% (10/762). Attrition at 6‐month follow‐up: 30% (230/762). This is slightly high but acceptable for 6 months post‐intervention
Selective reporting (reporting bias)	Low risk	All outcomes reported fully (n and % for categorical scales; number of participants, means and SDs for continuous scales)
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Blinding not possible but fidelity to treatment protocol monitored by videotaping 20% of sessions, thereby minimising variability in delivery of intervention as much as possible
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not stated