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When Eating Right, Is Measured Wrong! A Validation and Critical Examination of the ORTO-15 Questionnaire in German.
PLoS One. 2015; 10(8):e0135772.Plos

Abstract

The characteristic trait of individuals developing a pathological obsession and preoccupation with healthy foods and a restrictive and avoidant eating behavior is described as orthorexia nervosa (ON). For ON, neither universal diagnosis criteria nor valid tools for large-scale epidemiologic assessment are available in the literature. The aim of the current study is to analyze the psychometric properties of a translated German version of the ORTO-15 questionnaire. The German version of the ORTO-15, a eating behavior and dieting habits questionnaire were completed by 1029 German-speaking participants (74.6% female) aged between 19 and 70 years (M = 31.21 ± 10.43 years). Our results showed that after confirmatory factor analysis, the best fitting model of the original version is a single-factor structure (9-item shortened version: ORTO-9-GE). The final model showed only moderate internal consistency (Cronbach's alpha = .67), even after omitting 40% of the original question. A total of 69.1% participants showed orthorectic tendencies. Orthorectic tendencies are associated with special eating behavior features (dieting frequency, vegetarian and vegan diet). Education level did not influence ON tendency and nutritional students did not show higher ON tendency compared to students from other disciplines. This study is the first attempt to translate and to evaluate the psychometric properties of a German version of the ORTO-15 questionnaire. The ORTO-9-GE questionnaire, however, is only a mediocre tool for assessing orthorectic tendencies in individuals and shows moderate reliability and internal consistency. Our research suggests, that future studies are needed to provide more reliable and valid assessment tools to investigate orthorexia nervosa.

Authors+Show Affiliations

Department of Nutritional Sciences, University of Vienna, Vienna, Austria.Department of Psychiatry and Psychotherapy, Division of Social Psychiatry, Medical University of Vienna, Vienna, Austria.Department of Nutritional Sciences, University of Vienna, Vienna, Austria.Department of Nutritional Sciences, University of Vienna, Vienna, Austria.Department of Nutritional Sciences, University of Vienna, Vienna, Austria.Department of Nutritional Sciences, University of Vienna, Vienna, Austria.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26280449

Citation

Missbach, Benjamin, et al. "When Eating Right, Is Measured Wrong! a Validation and Critical Examination of the ORTO-15 Questionnaire in German." PloS One, vol. 10, no. 8, 2015, pp. e0135772.
Missbach B, Hinterbuchinger B, Dreiseitl V, et al. When Eating Right, Is Measured Wrong! A Validation and Critical Examination of the ORTO-15 Questionnaire in German. PLoS One. 2015;10(8):e0135772.
Missbach, B., Hinterbuchinger, B., Dreiseitl, V., Zellhofer, S., Kurz, C., & König, J. (2015). When Eating Right, Is Measured Wrong! A Validation and Critical Examination of the ORTO-15 Questionnaire in German. PloS One, 10(8), e0135772. https://doi.org/10.1371/journal.pone.0135772
Missbach B, et al. When Eating Right, Is Measured Wrong! a Validation and Critical Examination of the ORTO-15 Questionnaire in German. PLoS One. 2015;10(8):e0135772. PubMed PMID: 26280449.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - When Eating Right, Is Measured Wrong! A Validation and Critical Examination of the ORTO-15 Questionnaire in German. AU - Missbach,Benjamin, AU - Hinterbuchinger,Barbara, AU - Dreiseitl,Verena, AU - Zellhofer,Silvia, AU - Kurz,Carina, AU - König,Jürgen, Y1 - 2015/08/17/ PY - 2015/05/08/received PY - 2015/07/24/accepted PY - 2015/8/18/entrez PY - 2015/8/19/pubmed PY - 2016/5/11/medline SP - e0135772 EP - e0135772 JF - PloS one JO - PLoS One VL - 10 IS - 8 N2 - The characteristic trait of individuals developing a pathological obsession and preoccupation with healthy foods and a restrictive and avoidant eating behavior is described as orthorexia nervosa (ON). For ON, neither universal diagnosis criteria nor valid tools for large-scale epidemiologic assessment are available in the literature. The aim of the current study is to analyze the psychometric properties of a translated German version of the ORTO-15 questionnaire. The German version of the ORTO-15, a eating behavior and dieting habits questionnaire were completed by 1029 German-speaking participants (74.6% female) aged between 19 and 70 years (M = 31.21 ± 10.43 years). Our results showed that after confirmatory factor analysis, the best fitting model of the original version is a single-factor structure (9-item shortened version: ORTO-9-GE). The final model showed only moderate internal consistency (Cronbach's alpha = .67), even after omitting 40% of the original question. A total of 69.1% participants showed orthorectic tendencies. Orthorectic tendencies are associated with special eating behavior features (dieting frequency, vegetarian and vegan diet). Education level did not influence ON tendency and nutritional students did not show higher ON tendency compared to students from other disciplines. This study is the first attempt to translate and to evaluate the psychometric properties of a German version of the ORTO-15 questionnaire. The ORTO-9-GE questionnaire, however, is only a mediocre tool for assessing orthorectic tendencies in individuals and shows moderate reliability and internal consistency. Our research suggests, that future studies are needed to provide more reliable and valid assessment tools to investigate orthorexia nervosa. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/26280449/When_Eating_Right_Is_Measured_Wrong_A_Validation_and_Critical_Examination_of_the_ORTO_15_Questionnaire_in_German_ L2 - https://dx.plos.org/10.1371/journal.pone.0135772 DB - PRIME DP - Unbound Medicine ER -