A complex-intervention to change dengue prevention behaviours of the householders in the Kurunegala District

Abstract

INTRODUCTION AND OBJECTIVES: Dengue is a leading public health problem in Sri Lanka. Evaluation of community-based intervention on behavioural change is identified as the key functional areas to prevent future outbreaks. The study was aimed to assess the complex intervention package on changing the behaviour of the householders to prevent dengue in Kurunegala district. METHODS: A community-based parallel group cluster randomized trial was conducted to assess the effectiveness of the COMBI based behavioural change intervention (n=167) versus routine standards of dengue control activities (n=166) among the householders in highly dengue endemic area in Kurunegala district from May to September 2019. A pre-tested, validated, interviewer-administered tool was used to collect data. Intention to treat analysis was applied using Logistic Regression with Generalized Estimating Equations. RESULTS: There were significant improvements of the overall dengue prevention behaviour (27.4%, 95% CI: 17.1% - 37.7%), knowledge (12.3%; 95% CI: 1.7% - 22.9%), attitude (7.3%; 95% CI: - 1.77% - 16.4%), practices (29.2%; 95% CI: 18.9% - 39.5%), health seeking behaviour (14.7%; 95% CI: 4.12% - 25.3%), and reduction of Pupal-Index (49.3%; 95% CI: 39.7% - 58.9%), House- Index (30.8%; 95% CI: 28.3 - 47.1%), Container-Index (17.7%; 95% CI: 8.8% - 26.6%) and Breteau-Index (52.2%; 95% CI: 43.5% - 60.9%) in the intervention group in comparison with the control group after three-months of the intervention. CONCLUSION: A COMBI planning process based interventional approach to change the behaviour for sustainable dengue control is effective. Importantly, it contributed to a significant reduction in the density of dengue vectors (Pupal Index and HI, CI, BI) and a number of potentials.