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Examining the construct validity of food addiction severity specifiers

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Eating and Weight Disorders - Studies on Anorexia, Bulimia and Obesity Aims and scope Submit manuscript

Abstract

Purpose

Food addiction (FA) is related to greater body mass index (BMI), eating-disorder psychopathology, food craving, and psychosocial impairment. Less is known regarding the utility of the FA severity specifiers, as measured by the number of symptoms endorsed on the Yale Food Addiction Scale (YFAS 2.0).

Methods

Participants (N = 1854) were recruited from Amazon Mechanical Turk to complete an online survey on eating behaviors. Participants completed self-report measures assessing FA, eating-disorder psychopathology (Eating Disorder Examination Questionnaire), and food craving (Food Craving Inventory). Based on the YFAS 2.0 specifiers, participants were classified into four FA groups: No FA (n = 1643), mild (n = 40), moderate (n = 55), and severe (n = 116).

Results

There were significant differences found in age, sex, BMI, and frequency of objective binge-eating episodes (OBEs) among the FA groups. Using ANCOVA, adjusted for multiple comparisons and covariates (e.g., BMI, sex, OBEs), the No FA group reported significantly lower levels of shape concern (η2 = 0.05; p < 0.001), weight concern (η2 = 0.04; p < 0.001), eating concern (η2 = 0.15; p < 0.001), and global eating-disorder psychopathology (η2 = 0.06; p < 0.001) than mild, moderate, or severe FA groups. The No FA group reported significantly lower levels of dietary restraint (η2 = 0.01; p < 0.01) than mild and severe FA groups. The severe FA group reported higher food craving scores (η2 = 0.02; p < 0.001) compared to the No FA group.

Conclusion

Our findings parallel the severity specifiers literature for eating and substance use disorders by also indicating the limited utility of severity specifiers based on symptom count. Future research should investigate alternative targets for discriminating among levels of FA.

Level of evidence

Level V, cross-sectional descriptive study.

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Funding

This research was supported, in part, by NIH Grants: K23-DK092279 and T32 DA019426-15.

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Authors

Contributions

The authors contributions were as follows—AAW, MMC, VI, and RDB designed the research; AAW and MMC performed the statistical analysis; AAW, MMC, VI, and RDB contributed to interpretation of the data; AAW and MCC drafted the manuscript and all authors contributed to revisions of the manuscript. AAW, MMC, and RDB had full access to all of the data in the study and take responsibility for the integrity and accuracy of the data analysis.

Corresponding author

Correspondence to Ashley A. Wiedemann.

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Conflict of interest

The authors Wiedemann, Carr, Ivezaj, and Barnes report no conflicts of interest. Dr. Ivezaj reports broader interests including Honoraria for Journal Editorial Role and lectures.

Ethics approval

This study received approval from the University Institutional Review Board at the Yale School of Medicine. The procedures used in this study adhere to the tenets of the Declaration of Helsinki.

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All participants provided electronic informed consent.

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The article is part of the Topical Collection on Food and addiction.

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Wiedemann, A.A., Carr, M.M., Ivezaj, V. et al. Examining the construct validity of food addiction severity specifiers. Eat Weight Disord 26, 1503–1509 (2021). https://doi.org/10.1007/s40519-020-00957-w

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