Developing a knowledge, attitude, and practice questionnaire on nutrition, physical activity, and body image for 13–14-year-old female adolescents

OBJECTIVES: The objective of this study was to develop and validate a Knowledge, Attitude, and Practice Questionnaire (KAPQ) on nutrition, physical activity, and body image for 13–14-year-old female adolescents. METHOD: The KAPQ initially consisted of 73 items, covering knowledge (30), attitude (22), and practice (21) related to nutrition, physical activity (PA), and body image (BI). The content and face validity were tested to identify the relevance of the questionnaire items to the content and their relevance to nutrition, PA, and BI. Construct validity was assessed using an exploratory factor analysis (EFA). Internal consistency was determined by Cronbach's α value, and stability was determined based on test–retest reliability. RESULTS: Based on the EFA, each scale had several dimensions. The Cronbach's α ranged between 0.977 and 0.888 for knowledge, 0.902 and 0.977 for attitude, and 0.949 and 0.950 for practice. The test–retest reliability revealed that the kappa of knowledge was 0.773–1.000, while the intraclass correlation (ICC) values for attitude and practice were 0.682–1.000 and 0.778–1.000, respectively. CONCLUSION: The final KAPQ, which included 72 items, was valid and reliable for assessing the KAP levels for nutrition, PA, and BI of 13–14-year-old female students in KSA.