The study adopted a cluster-randomized
controlled trial design, and 1184 students in 12 schools were randomized to
intervention or control groups. Self-reported brushing and flossing, HBM/SCT
constructs, and oral health-related quality of life (OHRQoL) were measured at 6
and 12 months; Dental plaque accumulation and caries status were measured at 12
months.