Wolford 1993.

Methods	RCT. Students randomly selected to participate in study as well as being randomly allocated to 1 of 3 intervention groups or control
Participants	132 1st year undergraduate students (45.5% male, 54.4% female; ages not stated) at an urban university, USA
Interventions	Intervention 1: received a lecture programme. 27 students Intervention 2: received a video programme. 36 students Intervention 3: received a role play programme. 32 students Each intervention was delivered as a single session (duration unclear) Control: received no intervention. 37 students
Outcomes	Attitudes towards rape as measured by the General Attitudes Toward Rape Scale
Follow‐up	Immediate and 3‐4 months post‐test
Notes	‐
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Participants "randomly assigned"
Allocation concealment (selection bias)	Unclear risk	Not stated
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Attrition rate not reported
Selective reporting (reporting bias)	Low risk	Outcomes reported fully (number of participants, means and SDs)
Blinding of participants and personnel (performance bias) All outcomes	High risk	Blinding not possible. Facilitators were experienced in delivering these types of interventions but there is no mention of how adherence to protocol was monitored
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not stated