ArticleJournal der Deutschen Dermatologischen Gesellschaft = Journal of the German Society of Dermatology : JDDG2026
Epidemiology of nummular eczema - methodological approaches and outcomes from nationwide claims data analyses.
Article in Journal der Deutschen Dermatologischen Gesellschaft = Journal of the German Society of Dermatology : JDDG, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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6 authors.
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Abstract
BACKGROUND AND
objectivesNummular eczema (NE) is a chronic skin condition with limited epidemiologic data. This study estimates its prevalence, incidence and severity in Germany.
methodsA cross-sectional analysis (2016-2022) used German insurance claims data to identify NE cases (ICD-10 L30.0) and assess severity (hospitalization, work disability, systemic treatment) and comorbid skin conditions, including atopic dermatitis (AD).
resultsIn 2022, the prevalence of NE ranged from 0.07% to 0.26%. The incidence was 0.16%-0.17%. 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 years (0.56%-0.57%), were more affected. Severe NE was found in 14.8% of the patients. AD co-occurred 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).
conclusionsDespite 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.
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