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Published on: December 18, 2013
Risk of eating disorders, changes in salivary cortisol concentrations and nutritional status of adolescents
Laércio Marques da Luz Neto1, Tiago Coimbra Costa Pinto1, Everton Botelho Sougey1
1Graduate Program in Neuropsychiatry and Behavioral Sciences, Federal University of Pernambuco (UFPE), Av. da Engenharia, 186-298 - Cidade Universitária, Recife, Pernambuco, 50740-600, Brazil.
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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