Fig. 1

Change in annual mean monthly malaria incidence in Tororo District, 2013–2015. The figure shows the overall and age-stratified annual mean monthly malaria incidence before intensified vector control interventions were introduced (2012–2013), during the period when universal coverage of communities with LLIN was used alone in 2014 and when LLINs were combined with IRS in 2015. Overall, there was significant reduction in annual mean monthly malaria incidence from 95 in 2013 to 36 cases per 1000 in 2015 following introduction of integrated vector control interventions (chi = 27.5, P < 0.0001). Among children <5 years, there was a more significant reduction in annual mean monthly malaria incidence (Chi square = 43.9, P < 0.0001) compared to individuals aged 5 years or older (chi = 12.0, P = 0.0005) during the same period