Data collection and analysis
death, respiratory impairment
RESPIRATORY IMPAIRMENT
The study conducted baseline and final evaluation surveys for both groups. The design of the questionnaire was based on a previous study conducted on child drowning prevention [The study used the same questionnaire with the same definition of drowning for both groups in a double-blind method by investigators. According to the World Health Organization, drowning is the process of experiencing respiratory impairment from submersion/immersion in liquid. The outcomes are classified as death, morbidity and no morbidity [The information in the questionnaireThe sample size was calculated based on the intracluster correlation coefficient (ICC: the ratio of between-cluster variance to between- and within-cluster variances), drowning incidence rate and the expected effect size. The rate of incident of non-fatal drowning among children was estimated at 10% for Grades 3–9 [The two townships were randomly assigned to the intervention and control groups. The study employed univariate analysis using The study analysed the differences in the incidence of drowning, knowledge and high-risk behaviours between the intervention and control groups at the end of project using the difference-in-differences (DID) method. Analyses were performed using SPSS V.21.0 and SAS version 9.2.