Abstract
Purpose
The imposition of the thin body as an ideal of beauty and the changes that occur in adolescence lead to a constant concern with adolescents’ body weight, putting them at risk for eating disorders. Thus, the study sought to investigate associations between eating disorders and salivary cortisol concentrations, nutritional status and depressive symptoms in female adolescents with bulimia.
Methods
A cross-sectional study was carried out with 1435 adolescents aged 10–19 years. The Bulimic Investigatory Test of Edinburgh (BITE) and Body Shape Questionnaire (BSQ) questionnaires were used. A follow-up study was conducted from a random selection of female adolescents diagnosed with Bulimia Development and Well-Being Assessment—(DAWBA) to assess associations with salivary cortisol concentrations and nutritional status.
Results
The prevalence of body dissatisfaction among adolescents with symptoms of bulimia was 37%. There was a significant difference between salivary cortisol and bulimia (Risk Group = 0.33 ± 0.20 μg/100 ml, Diagnostic Group = 0.44 ± 0.21 μg/100 ml p = 0.040), and correlation positive between the risk of bulimia with symptoms of depression (0.355 p = 0.002) and with Body Mass Index (0.259 p = 0.028). High concentrations of salivary cortisol in bulimic adolescents may be associated with hyperactivity of the hypothalamic–pituitary–adrenal axis and depressive symptoms.
Conclusions
Nutritional status indicators cannot be used alone for the diagnosis of bulimia, since cortisol levels seem to be a reliable parameter in the identification of bulimia, provided they are used with other diagnostic criteria.
Level III
Evidence obtained from cross-sectional study.
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Data availability
All data and materials support the published statements and meet field standards.
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Acknowledgements
The authors are grateful to the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior -Brazil (CAPES) for funding this study, the researchers of the Eating Behavior Group of the Federal University of Pernambuco (UFPE) and the adolescents who participated in the study.
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This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brazil (CAPES).
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All authors made substantial contributions to the preparation of this study. LM da LN: responsible for the project design and planning, supervision of research execution, data acquisition and manuscript writing. TCCP: responsible for the idealization and planning of the project and supervised execution of the research. EBS responsible for designing and planning the project, supervising the execution of the survey, data interpretation and statistical analysis. WÁ da SD responsible for writing the manuscript. AV dos S responsible for writing the manuscript. RCCX responsible for data interpretation, statistical analysis and manuscript writing.
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This study was approved by the Institutional Review Board/Research Ethics Committee of the Federal University in Pernambuco, Brazil.
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da Luz Neto, L.M., Pinto, T.C.C., Sougey, E.B. et al. Risk of eating disorders, changes in salivary cortisol concentrations and nutritional status of adolescents. Eat Weight Disord 27, 2415–2423 (2022). https://doi.org/10.1007/s40519-022-01382-x
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DOI: https://doi.org/10.1007/s40519-022-01382-x