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Orthorexia nervosa: Validation of a diagnosis questionnaire

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Abstract

Aim: To validate a questionnaire for the diagnosis of orhorexia oervosa, an eating disorder defined as “maniacal obsession for healthy food”. Materials and Methods: 525 subjects were enrolled. Then they were randomized into two samples (sample of 404 subjects for the construction of the test for the diagnosis of orthorexia ORTO-15; sample of 121 subjects for the validation of the test). The ORTO-15 questionnaire, validated for the diagnosis of orthorexia, is made-up of 15 multiple-choice items. Results and Conclusion: The test we proposed for the diagnosis of orthorexia (ORTO 15) showed a good predictive capability at a threshold value of 40 (efficacy 73.8%, sensitivity 55.6% and specificity 75.8%) also on verification with a control sample. However, it has a limit in identifying the obsessive disorder. For this reason we maintain that further investigation is necessary and that new questions useful for the evaluation of the obsessive-compulsive behavior should be added to the ORTO-15 questionnaire.

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Authors and Affiliations

  1. Istituto di Scienza dell’Alimentazione, Universitá degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, 00185, Rome, Italy

    L. M. Donini MD PhD, D. Marsili, M. P. Graziani & C. Cannella

  2. Istituto di Scienze dell’Alimentazione, CNR, Avellino, Italy

    M. Imbriale

Authors
  1. L. M. Donini MD PhD
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  2. D. Marsili
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  3. M. P. Graziani
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  4. M. Imbriale
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  5. C. Cannella
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Correspondence to L. M. Donini MD PhD.

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Donini, L.M., Marsili, D., Graziani, M.P. et al. Orthorexia nervosa: Validation of a diagnosis questionnaire. Eat Weight Disord 10, e28–e32 (2005). https://doi.org/10.1007/BF03327537

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  • DOI: https://doi.org/10.1007/BF03327537

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