Statistical methods
HAND INFECTION
Descriptive statistics (proportions and means) and infection status associations were calculated with confidence intervals adjusting standard errors for clustering at the village level using the svy command in Stata. To assess the impact of the intervention, a mixed effect logit model with arm as a fixed effect and cluster included as a random effect was used to produce odds ratios using both the RDT and/or microscopy data. Impact was assessed separately for villages with more than 70% of houses with SET installed, compared to those with less than or equal to 70% coverage. Per protocol analyses involved comparison of children who lived in houses with SET installed with those in control clusters.To compare differences between the baseline and endline results (in children aged 6 months to 10 years only), an interaction between arm and survey was fitted to the mixed effect logistic model previously described.Incidence was calculated as described in detail in the main trial results paper [This study is registered as an International Standard Randomised Controlled Trial, ISRCTN18145556.