Characteristics of the study clusters in Muleba region, Tanzania, 2011.

Note: N = number in each category, CI = confidence intervals,122nd February- 25th March 2011,227th June- 3rd August 2011,3Plasmodium falciparum infection prevalence in children 0.5–14 years old from RDTs,4Households per square Km,5mean altitude of all households mapped in the core surveillance area of the cluster (metres above sea level),6Sprayed in January 2011-Feb 2011 and recorded in survey 1,7Percentage of all residents that slept under an ITN the previous night,8Percentage of households owning ≥1 ITN per 2 residents (universal coverage),9age adjusted. Altitude and housing density were not included in the multivariable model as they were not confounders for the main variables of interest.