Design
A school-based cluster randomized controlled trial (RCT) was conducted to test the effectiveness of the program. Contamination of the information provided across groups within the same school may have occurred. Therefore, the RCTs of schoolteachers could use schools as clusters [The program, which was offered online on an individual basis, could only be watched by the intervention group. The outcome measures were evaluated using a self-administered web survey by comparing the two groups at three time points: baseline (T1), post (T2), and one month later (T3). Ethical considerations allowed the control group to participate in the same program after the final T3 response. No major changes were made to the methods after trial commencement. The trial findings were reported in a subsequent publication in accordance with the Consolidated Standards of Reporting Trials (CONSORT).