{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,7]],"date-time":"2026-09-07T21:55:21Z","timestamp":1788818121699,"version":"build-2803163510"},"reference-count":21,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2025,11,16]],"date-time":"2025-11-16T00:00:00Z","timestamp":1763251200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,11,16]],"date-time":"2025-11-16T00:00:00Z","timestamp":1763251200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Deutsche Derma Gesell"],"published-print":{"date-parts":[[2026,7]]},"abstract":"<jats:title>Summary<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background and Objectives<\/jats:title>\n                    <jats:p>Nummular eczema (NE) is a chronic skin condition with limited epidemiologic data. This study estimates its prevalence, incidence and severity in Germany.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A cross\u2010sectional analysis (2016\u20132022) used German insurance claims data to identify NE cases (ICD\u201010 L30.0) and assess severity (hospitalization, work disability, systemic treatment) and comorbid skin conditions, including atopic dermatitis (AD).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>In 2022, the prevalence of NE ranged from 0.07% to 0.26%. The incidence was 0.16%\u20130.17%. The mean age was 47.5 years, and 57.4% of the patients were male. Older males had a higher prevalence, while children younger than six years (0.34%), especially those younger than 2\u00a0years (0.56%\u20130.57%), were more affected. Severe NE was found in 14.8% of the patients. AD co\u2010occurred in 18% of NE cases. NE patients had an increased risk of lichen simplex chronicus (RR 9.71), irritant contact dermatitis (RR 9.60), pruritus (RR 5.71), allergic rhinitis (RR 1.78), and allergic asthma (RR 1.49).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Despite differences in methodological approaches leading to some variation, the prevalence of NE in the German population can be reasonably estimated at approximately 0.26%. Overlaps and miscoding may have occurred, particularly with other forms of eczema, underscoring the need for reliable diagnostics and standardized coding.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/ddg.15932","type":"journal-article","created":{"date-parts":[[2025,11,17]],"date-time":"2025-11-17T07:30:32Z","timestamp":1763364632000},"page":"886-893","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Epidemiology of nummular eczema \u2013 methodological approaches and outcomes from nationwide claims data analyses"],"prefix":"10.1111","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2676-1479","authenticated-orcid":false,"given":"Kristina","family":"Hagenstr\u00f6m","sequence":"first","affiliation":[{"name":"German Center for Health Services Research in Dermatology (CVderm) Institute for Health Services Research in Dermatology and Nursing (IVDP) University Medical Center Hamburg\u2010Eppendorf (UKE)  Hamburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Katharina","family":"M\u00fcller","sequence":"additional","affiliation":[{"name":"German Center for Health Services Research in Dermatology (CVderm) Institute for Health Services Research in Dermatology and Nursing (IVDP) University Medical Center Hamburg\u2010Eppendorf (UKE)  Hamburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-0760-3103","authenticated-orcid":false,"given":"Theresa","family":"Klinger","sequence":"additional","affiliation":[{"name":"German Center for Health Services Research in Dermatology (CVderm) Institute for Health Services Research in Dermatology and Nursing (IVDP) University Medical Center Hamburg\u2010Eppendorf (UKE)  Hamburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charlotte","family":"Willers","sequence":"additional","affiliation":[{"name":"German Center for Health Services Research in Dermatology (CVderm) Institute for Health Services Research in Dermatology and Nursing (IVDP) University Medical Center Hamburg\u2010Eppendorf (UKE)  Hamburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kilian","family":"Eyerich","sequence":"additional","affiliation":[{"name":"Dept. of Dermatology and Venereology University Medical Center of Freiburg  Freiburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4026-8728","authenticated-orcid":false,"given":"Matthias","family":"Augustin","sequence":"additional","affiliation":[{"name":"German Center for Health Services Research in Dermatology (CVderm) Institute for Health Services Research in Dermatology and Nursing (IVDP) University Medical Center Hamburg\u2010Eppendorf (UKE)  Hamburg 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