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A large representative study in Germany. Orthorexia is described as a strict, health-oriented eating pattern with clinically significant impairment in everyday life. Its prevalence varied widely in previous studies due to heterogenous assessment procedures. Determinants for the eating pattern and its prevalence have not been investigated in larger representative studies. METHODS: A population-based telephone survey in Germany was conducted in n = 1007 participants. The Dusseldorf Orthorexia Scale with a cut-off of 30 was used to assess orthorexic behavior. Determinants of orthorexia, including personal BMI, depressive symptoms Patient Health Questionnaire and socio-demographic variables were analyzed in multivariate regression. RESULTS: The prevalence of orthorexic behavior was 6.9%. A higher rate of orthorexic behavior was observed in heavier, less educated, vegetarian and more depressed participants; in multivariate analysis only associations to lower educational attainment, a vegetarian diet and depressive symptoms remained. No gender or age differences were observed. CONCLUSIONS: The study results show that orthorexic behavior may indeed by associated with significant strain and psychological distress. Current debates on the criteria of clinical significance of orthorexic behavior call for new instruments and further investigations, to elicit the prevalence of people with orthorexic behavior that classifies as a pathological eating disorder. Eat Weight Disord. 2018 Mar 21. doi: 10.1007/s40519-018-0502-5. [Epub ahead of print]
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