Validation of the French version of the Binge Eating Scale: examination of its factor structure, internal consistency and construct validity in a non clinical and a clinical population
Validation de la version française de la Binge Eating Scale : étude de sa structure factorielle, de sa consistance interne et de sa validité de construit en population clinique et non clinique
Résumé
Objective: The Binge Eating Scale is a widely used scale to assess binge eating disorder in obese patients. Until now this scale has not been validated on a French population, and no psychometrically sound tool assesses binge eating disorder in the French. This study aimed to test the psychometric properties of a French version of the Binge Eating Scale by establishing its factor structure, internal consistency, and construct validity in both a non-clinical population and a clinical population (obese patients who are candidates for bariatric surgery). Methods: 553 non clinical subjects and 63 morbidly obese patients who were candidates for bariatric surgery were assessed with the BES and the Bulimic Investigatory Test, Edinburgh or BITE (which assesses both binge eating behaviours and use of inappropriate compensatory behaviours). We tested the factor structure of the instrument, its internal consistency, its construct validity with measures of binge eating, and its construct validity with measures of inappropriate compensatory behaviours to avoid weight gain. In 47 out of the 63 obese patients, we assessed binge eating disorder (SCID). Results: In the non clinical population, the BES had a one factor structure (which accounted for 61 % of the variance), excellent internal consistency (= 0.93), and high construct validity with measures of binge eating. In this population, construct validity with measures of inappropriate compensatory behaviours was confirmed in overweight and obese subjects (p = 0.42), but not in underweight and optimal weight subjects (p < 0.001). In obese patients candidates for bariatric surgery, we demonstrated that the BES had a one factor structure (which accounted for 46 % of the variance), had high internal consistency (= 0.88) and high construct validity with measures of binge eating and good construct validity with measures of inappropriate compensatory behaviours to avoid weight gain. In the subpopulation of 47 obese patients, sensitivity, specificity, positive predictive value and negative predictive value were respectively 75 %, 88.4 %, 37.5 % and 97.4 % (BES threshold=18). Discussion: In this study, we validated a psychometrically sound French version of the Binge Eating Scale, both in a non clinical and a clinical sample. The psychometric properties of the French version of the BES are comparable to its original version with a one factor structure. The BES is a useful tool to assess binge eating disorder in obese patients (e.g., bariatric surgery candidates), but might not differentiate between binge eating disorder and bulimia nervosa in underweight and optimal weight subjects.
Objectif : la Binge Eating Scale (BES) est un outil utile pour évaluer et dépister l’hyperphagie boulimique chez les sujets obèses, mais n’a jusqu’à présent pas été validé en français. L’objectif de ce travail était de tester les propriétés psychométriques de la version française de la Binge Eating Scale (BES), en établissant sa structure factorielle, sa consistance interne et sa validité de construit en population non clinique et clinique. Matériel et méthode : la BES a été testée auprès d’une population non clinique (n=553) et de patients obèses morbides candidats à la chirurgie bariatrique (n=63), avec administration concomitante de la Bulimic Investigatory Test, Edinburgh (BITE) pour tester la validité de construit. Résultats : la BES possède une structure mono-factorielle (expliquant 61 % de la variance en population non clinique et 46 % en population clinique), une très bonne consistance interne (respectivement de =0,93 et =0,88) et une très bonne validité de construit vis-à-vis des comportements boulimiques. La validité de construit vis-à-vis du recours à des comportements compensatoires était confirmée en population clinique et chez les sujets obèses ou en surpoids de la population non clinique (p=0,42), mais pas chez les patients normo-pondéraux ou maigres de la population non clinique (p<0,001). Conclusion : la version française de la BES possède des propriétés psychométriques proches de la version originale. La BES est un outil utile pour évaluer et dépister l’hyperphagie boulimique chez les sujets obèses, pouvant notamment être utilisé chez les patients candidats à la chirurgie bariatrique.
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Encéphale-postprintHAL-2016-Version francaise Binge Eating Scale.pdf (643.39 Ko)
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