Reliability and Construct Validity of Knowledge, Attitude and Practice on Dengue Fever Prevention Questionnaire
Mohammad Nasir Abdullah, Wan Nor Hazimah Wan Azib, Mohd Fauzi Mohd Harun, Muhamad Addin Burhanuddin

Abstract
Dengue fever is not just a disease but it is a worldwide phenomenon. Knowledge on dengue prevention is helpful to save life but a practice of knowledge among people to stop dengue fever is a lively issue among scholars. These viruses usually transmitted by Aedes aegypti and Aedes albopictus. The aim of this study was to assess the reliability and construct validity of Knowledge, attitude and practice of dengue fever prevention in Malaysia, especially in Perak state. A cross-sectional study and designed to validate the Knowledge, Attitude and Practice on dengue fever questionnaire in Perak Tengah District, Perak. Forty three items of the knowledge, attitude and practice questionnaire were designed based on the literature and expert opinions. The items on the questionnaire developed for this study were divided into four main sections which are demographic, knowledge, attitude and practice. Reliability was determined using Cronbach’s alpha for internal consistency where the construct validity was assessed using exploratory factor analysis using principal component with varimax rotation. The results indicate that the Cronbach’s alpha coefficients showed acceptable and satisfactory internal consistencies. Cronbach’s alpha coefficients for knowledge and practice were 0.968 and 0.790, respectively and therefore confirming the adequacy of the internal consistencies of these scales. However, the internal consistency for attitude scale was the lowest of the three domains (cronbach’s alpha = 0.638). The results of the validation study suggested that the KAP scales on dengue fever prevention are valid and reliable for assessing knowledge, attitude and practice in Malaysia especially in Perak state.


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