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However, it remains unclear whether the pandemic affected only the frequency or also the severity of eating disorders. We examined potential pandemic-related changes in the administrative prevalence of eating disorders in the outpatient sector compared with other mental disorders using German statutory health insurance data for the age group 10 to 16 years. We also examined disorder severity of anorexia nervosa using data from the multicenter German Registry of Children and Adolescents with Anorexia Nervosa in the same age group. Our results showed a marked increase in the administrative prevalence of eating disorders (based on documented diagnoses) in the outpatient sector among girls but not among boys. A similar pattern was found for internalizing disorders, whereas the administrative prevalences of externalizing disorders decreased. Regarding the severity of anorexia nervosa among inpatients, we found no pandemic-related changes in body mass index standard deviation score at admission, body weight loss before admission, psychiatric comorbidities and psychopharmacological medication. Given the administrative prevalence increase in the outpatient sector, the lack of impact of the pandemic on the inpatient sector may also be partly due to a shift in healthcare utilization towards outpatient services during the pandemic. Thus, the higher number of children and adolescents requiring specialized and timely outpatient care may be a major concern under pandemic conditions.<\/jats:p>","DOI":"10.1007\/s00787-024-02527-2","type":"journal-article","created":{"date-parts":[[2024,7,20]],"date-time":"2024-07-20T19:01:22Z","timestamp":1721502082000},"page":"983-995","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["The impact of the COVID-19 pandemic on administrative eating disorder prevalence in the outpatient sector and on severity of anorexia nervosa"],"prefix":"10.1007","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8333-867X","authenticated-orcid":false,"given":"Friederike 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T. and S. E. have received a research grant from the \u201cMarga and Walter Boll-Stiftung\u201d. F. T. has received a research grant from the B. Braun Stiftung and funding from the Medical Faculty of the Technische Universit\u00e4t Dresden (\u201cHabilitation Funding for Women\u201d). S. E. has received funding by the Deutsche Forschungsgemeinschaft (EH 367\/5-1, EH 367\/7-1 and SFB 940), the Swiss Anorexia Nervosa Foundation and the Ingvild Goetz Philanthropy. C. C. has been a consultant and\/or advisor to or has received honoraria from: AbbVie, Acadia, Adock Ingram, Alkermes, Allergan, Angelini, Aristo, Biogen, Boehringer-Ingelheim, Bristol-Meyers Squibb, Cardio Diagnostics, Cerevel, CNX Therapeutics, Compass Pathways, Darnitsa, Denovo, Gedeon Richter, Hikma, Holmusk, IntraCellular Therapies, Jamjoom Pharma, Janssen\/J&J, Karuna, LB Pharma, Lundbeck, MedAvante-ProPhase, MedInCell, Merck, Mindpax, Mitsubishi Tanabe Pharma, Mylan, Neurocrine, Neurelis, Newron, Noven, Novo Nordisk, Otsuka, Pharmabrain, PPD Biotech, Recordati, Relmada, Reviva, Rovi, Sage, Seqirus, SK Life Science, Sumitomo Pharma America, Sunovion, Sun Pharma, Supernus, Takeda, Teva, Tolmar, Vertex, and Viatris. C. C. provided expert testimony for Janssen and Otsuka. C. C. served on a Data Safety Monitoring Board for Compass Pathways, Denovo, Lundbeck, Relmada, Reviva, Rovi, Supernus, and Teva. C. C. has received grant support from Janssen and Takeda. C. C. received royalties from UpToDate and is also a stock option holder of Cardio Diagnostics, Kuleon Biosciences, LB Pharma, Mindpax, and Quantic. J. H. was named as inventor in three patent filings of the University of Duisburg-Essen for treatment of anorexia nervosa, related eating disorders and depression with leptin analogues. K. B. receives or has received research grants from the German Research Foundation (DFG), German Federal Ministry for Education and Research (BMBF), Philipps-University Marburg, Federal Joint Committee (G-BA), German Ministry for Health, University Hospital Giessen and Marburg and Rh\u00f6n Klinikum AG. Further, K. B. receives royalties and honorary from Georg Thieme Publisher. T. L. received funding from the Federal Ministry of Education and Research (BMBF) as well as the Swiss Anorexia Nervosa Foundation for research projects and royalities for text books and treatment manuals from Hogrefe, Kohlhammer, Springer and DeGrutyter. V. R. has received payment for consulting and writing activities from Eli Lilly and Co., Novartis and Shire Pharmaceuticals\/Takeda, lecture honoraria from Eli Lilly and Co., Novartis, Shire Pharmaceuticals\/Takeda, and Medice Pharma, and support for research from Shire Pharmaceuticals\/Takeda and Novartis. V. R. has carried out (and is currently carrying out) clinical trials in cooperation with Novartis, Shire Pharmaceuticals\/Takeda and Otsuka. V. R. has no financial relationship with the organizations that sponsored the research. All other authors declare no competing interests.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}]}}