Abstract
Background
The Yale Food Addiction Scale (YFAS) was developed in 2009 to assess food addiction (FA); a revised version was released in 2016 (YFAS 2.0). The objective of this study was to determine the statistical and clinical validity of the YFAS 2.0 in adults seeking bariatric surgery.
Methods
Patients who underwent a preoperative psychological evaluation in preparation for bariatric surgery from 2015 to 2018 were included. The YFAS 2.0 was administered as part of routine clinical care and validated against an assessment battery of standardized clinical measures. Statistical analyses included chi-square and Wilcoxon rank sum tests and calculation of Spearman’s rank correlation coefficients.
Results
Overall, 1061 patients were included. Mean age and BMI were 47.5 ± 12.9 years and 46.9 ± 13.4 kg/m2, respectively. There were 196 (18%) patients who screened positive on the YFAS 2.0 (21% mild, 23% moderate, and 56% severe FA). The YFAS 2.0 demonstrated strong convergent validity where patients who met criteria for FA had significantly increased levels of binge eating (p < 0.001), emotional eating (p < 0.001), and lower self-efficacy (p < 0.001). Discriminant validity was demonstrated by lack of association with alcohol use (p = 0.319). The YFAS 2.0 was significantly correlated with total scores for depression (p < 0.001), anxiety (p < 0.001), bipolar disorder symptoms (p < 0.001), and trauma history (p < 0.001).
Conclusions
The prevalence of FA in a large sample of patients seeking bariatric surgery was consistent with previous literature. These data suggest that the YFAS 2.0 is psychometrically valid, demonstrating strong construct validity, and is a clinically useful measure of FA severity in patients pursuing bariatric surgery.
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All of the study authors adhere to and acknowledge the ethical responsibilities for authorship. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study was a retrospective review of prospectively collected data and IRB approval was obtained. For this type of study, formal consent from each individual was not required.
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Koball, A.M., Borgert, A.J., Kallies, K.J. et al. Validation of the Yale Food Addiction Scale 2.0 in Patients Seeking Bariatric Surgery. OBES SURG 31, 1533–1540 (2021). https://doi.org/10.1007/s11695-020-05148-1
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DOI: https://doi.org/10.1007/s11695-020-05148-1