Intervention fidelity
The investigators developed criteria to assess the intervention’s fidelity based on the standards for peer education programs guideline [To balance the differences, equal numbers of participants were drawn from eligible students for the intervention and control groups. To standardise the intervention within the intervention group, each student received an equal number of peer education sessions and contacts. Pre- and post-training tests and practical evaluations were used to assess peer educator knowledge and skill. Data entry clerks were blinded by labelling the groups with a non-identifiable unique number until the analysis was completed.