Abstract
IntroductionAlthough orthorexia is described as a pathological obsession over healthy food, its nature remains unclear. The results of the majority of studies, mainly using the ORTO-15 measurement scale, remain limited to certain countries and cannot be generalized to every culture. Furthermore, recent studies suggest that body image should be included in the orthorexia research, in addition to eating disorders. ObjectiveThe aim of this study was to propose a French adaptation of the ORTO-15 measurement scale using the Vallerand's transcultural validation procedure, explore its psychometric properties and the links between orthorexic behvaiour, symptoms of eating disorders and body image. MethodFour hundred and nine young adults (89% female), aged 18 to 25 years, completed the online version of the following scales: ORTO-15, Dunn et al. criteria (2016), the Eating-Attitudes Test (EAT-26), Binge Eating Scale (BES) and the Multidimensional Body Self Relations Questionnaire-Appearance Scale (MBSRQ-AS). Exploratory and confirmatory factor analysis (EFA and CFA, respectively) were carried out on two randomly split samples and links between different variables were explored using Spearman correlation coefficients. ResultsThe EFA yielded a single-factor 11-items structure explaining 24% of variance. The adjustment indices from the CFA were excellent. The stability of the scale was satisfactory (ICC=0.71), despite a questionable internal consistency (α=.50). Links with other scales indicated good structural validity. ConclusionORTO-11-Fr presented satisfactory psychometric properties. Further studies are needed for identifying predictors of orthorexia as well as improving its definition and assessment.
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