Development and validation of a weight management program model for overweight and obese individuals

INTRODUCTION: Developing a structured and theory-based model can enhance the effectiveness of weight management program. However, the underlying model requires validation to ensure its accuracy and applicability. Therefore, this study aimed to demonstrate the development and validation process of a weight management program model for overweight and obese individuals. MATERIALS AND METHODS: A weight management program model was previously developed using thematic analysis and scoping review by utilizing Theory of Change as the framework. Seven experts were invited to evaluated using the content validity index through online questionnaire, comprising 42 items, and provided feedback on its features for face validity. RESULTS: The developed model structured with 6 domains, 6 constructs, and 23 sub-constructs. More than 85.71% of the experts agreed on the face validity of the developed model. The content validity result indicated that the experts reached a consensus on all 6 domains. The modified kappa represented excellence in all 6 domains, with a k* value of 0.97-1.00. Meanwhile, the S-CVI/Ave and S-CVI/UA values ranged from 0.97-1.00 and 0.80-1.00, respectively. Several experts suggested ideas and recommendations for improvement. The validation led to all items being accepted without elimination. CONCLUSION: The weight management program model has been validated, and all 6 domains were retained following expert validation. This model is expected to provide insightful and valuable guidance for future practitioners in planning and executing weight management programs among individuals with overweight and obesity issues.

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