Abstract

Abstract Background The risk of eating disorders (ED) has been linked to body image (BI) dissatisfaction in adolescents. In addition, the origin and host country culture may influence BI dissatisfaction. Our objective was to assess the modifying effect of migratory status on the association between BI and risk of ED in Belgium, a setting characterized by a large proportion of migrant adolescents. Methods In the 2022 cross-sectional “Health Behaviour in School-aged Children” (HBSC) study in French-speaking schools, 7,267 adolescents aged 12 to 20 self-completed questionnaires. Risk of ED was determined by an Eating Attitude Test (EAT-7), score ≥5. BI was categorised into 3 groups: “too thin”, “about the right size” and “too fat”. Migratory status was divided into “native”, “2nd generation” and “1st generation” migrants. The association between BI and ED was estimated using logistic regressions adjusted for socioeconomic and psychosocial characteristics. After the inclusion of the “migration*BI” interaction term, migration-stratified logistic regressions were conducted. Results Overall, 13.0% of students were at risk of ED. Percentages of ED were 15.7% among those who perceived themselves as “too fat” (vs. “about the right size”: aOR=1.67 [95%CI: 1.34-2.08]) and 19.4% in the “too thin” group (aOR=3.36 [2.54-4.45]). Despite non-significant interaction terms, perceiving themselves as “too fat” (vs. “about the right size”) was not associated with the risk of ED in 1st generation migrants (aOR: 1.24 [0.67-2.29]). Compared with the overall estimation, it was lower in 2nd generation migrants (aOR: 1.43 [1.00-2.03]) while it was slightly higher in natives (aOR: 1.95 [1.45-2.62]). Conclusions These findings suggest complex interrelations between BI and risk of ED according to migratory status in adolescents with potential underlying mechanisms involving cultural norms. Promoting positive BI as a possible way for preventing the development of eating disorders need to be further investigated. Key messages • This study shows differences of body image dissatisfaction according to the migratory status in adolescents, inducing potential impacts on the risk of eating disorders. • Better understanding differences in body perception related to cultural background could help prevent risk of eating disorders in adolescents, by promoting positive body image for example.

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