| Summary: | Development and administration of the HCL by the Ministry of Health was a major step and initiative in reducing the number of non-communicable diseases related death cases in Malaysia. However, there needs to be more on how the consumers understand and interpret the HCL as it reflects the quality and uses of the invented HCL. Hence, this study aimed to develop a validated reliability questionnaire in assessing the understanding and interpretation of HCL among consumers. One set of questionnaires consisting of 26 questions was designed and validated by 13 experts. The content validity index (CVI) and content validity ratio (CVR) were decided in validating each question. As well as the reliability of the questions was determined by finding the internal consistency value and test-retest method. Eighteen (18) questions from the initial 26 questions made it through to the finalised questionnaire. Almost all the questionnaire’s items had CVR values above 0.54, except for the same for CVI value which only five questions had a value of below 0.79. The Cronbach’s alpha coefficients value for domain understanding and interpretation were 0.502 and 0.503, respectively. The ICC scores of the questions in the questionnaire ranged between 0.682 and 1.000 (moderate to excellent reliability). This study conveys the good validity and reliability of the questionnaire, which can be used in determining the understanding and interpretation of HCL among consumers in Malaysia. © 2023, Faculty of Medicine, University of Malaya. All rights reserved.
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