Holcomb 2002.

Methods	Cluster‐RCT. Classes randomly assigned to intervention or control
Participants	141 freshman athletes (65.9% men, 34.1% women; mean age 18.1 years) enrolled in health education class at a university, USA
Interventions	Intervention: mixed gender date rape prevention programme consisting of case scenarios and discussions. Delivered by 2 women health education instructors who had a script, training protocol and the research design protocol to hand. The intervention was delivered as a single 50‐minute session. 56 students Control: no intervention. 85 students
Outcomes	Attitudes towards date rape, as measured by the Date Rape Attitudes Survey
Follow‐up	Post‐test "after presentation" (presumably immediately after but unclear)
Notes	‐
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Course sections assigned "randomly"
Allocation concealment (selection bias)	Unclear risk	Not stated
Incomplete outcome data (attrition bias) All outcomes	Low risk	Not directly stated but analyses conducted on n = 141 implying no loss to follow‐up
Selective reporting (reporting bias)	Low risk	Number of participants and means reported with summary statistics. No SD/SE reported
Blinding of participants and personnel (performance bias) All outcomes	High risk	Blinding not possible. Some effort made to ensure intervention delivery remained the same through training of staff but no mention of how adherence to guidelines was monitored
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not stated