CONSORT diagram.
Notes: Data was collected by gathering participating students in an auditorium and providing them with time to complete the assessment. Missing participants fall into two categories: drop-out participants and absent participants. Drop-out participants occurred when they informed the intervention implementer of their withdrawal from the study. If they did not complete the post-intervention assessment (T1), they were also missing from the follow-up assessment (T2). Absent participants were those who were not present at school on the day of assessment. Therefore, participants who were missing from the post-intervention assessment (T1) might be present at T2 and completed the follow-up assessment (T2). Therefore, the number of lost participants at T2 were counted in comparison to the baseline participants.