Statistical analysis
The data analysis was performed using STATA version 14.0. The participants were assigned to clusters based on where they lived at the start of the trial. The proportions of participants who had good knowledge about MWH, and had favorable attitude towards MWH were computed at baseline and endline for both intervention and control groups. The outcome measures between the intervention and control arms were compared using the Pearson’s chi-square test of independence. The difference-in-difference (diff-in-diff) estimator was used to estimate the net effect of the intervention, as the baseline outcome did not determine the cluster allocation