Study Design
RECRUITMENT
This study used a 2-arm, parallel, cluster randomized controlled trial (RCT) design based on the CONSORT (Consolidated Standards of Reporting Trials) guideline’s extension for clustered RCTs. The clusters in this RCT were government preschools under the Community Development Department that provided education to children aged 3 to 4 years from low-income communities. All clusters were randomly assigned into the intervention group receiving the CONSORT (Consolidated Standards of Reporting Trials) diagram describing the recruitment and progress of participants throughout the study period. T0: baseline; T1: immediately after the intervention; T2: 3 months after the intervention.