Validation of Tools to Assess Predictors of Successful Weight Loss Outcome in Individuals With Overweight and Obesity

• Published in: Journal of nutrition education and behavior Vol. 54; no. 9; pp. 878 - 885
• Main Authors: Chopra, Sakshi, Ranjan, Piyush, Malhotra, Anita, Sarkar, Siddharth, Kumari, Archana, Prakash, Bindu, Kaloiya, Gauri Shankar, Dwivedi, Sada Nand, Siddhu, Anupa, Vikram, Naval K.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.09.2022
• Subjects: Adult; behavioral predictors; environmental predictors; Humans; Obesity - therapy; Overweight - therapy; Psychometrics; psychosocial predictors; reliability; Reproducibility of Results; Surveys and Questionnaires; validity; Weight Loss; psychosocial predictors; environmental predictors; behavioral predictors; validity; reliability
• ISSN: 1499-4046; 1878-2620
• DOI: 10.1016/j.jneb.2021.12.002

To develop and validate questionnaires to assess the behavioral, psychosocial, and environmental predictors of successful weight loss outcomes. Mixed method study. Questionnaires were developed using 5 steps: item generation by literature review and preexisting questionnaires, expert evaluation, pilot testing, factor analysis, and internal consistency. Adults with obesity recruited via web-based survey hyperlink. One hundred participants with a mean body mass index of 28.7 ± 4.4 kg/m2. The questionnaires were generated using 221 items. Establishing content, face and construct validity, and internal consistency. Content validity was analyzed using content validity index and content validity ratio, internal consistency through Cronbach α (CA), and structural validity by factor analysis via principal varimax rotation. All three questionnaires had good content validity. The Behavioral Predictor Questionnaire had good internal consistency (CA, 0.7) and excellent structural validity (69.7%). Psychosocial Predictors Questionnaire (CA, 0.8, 67.5%) and Environmental Predictors Questionnaire (CA: 0.8, 72.2%) had excellent internal consistency and structural validity. Questionnaires seem to be practical, valid, and reliable tools for baseline assessment of individual-specific factors related to weight loss success.