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Updated: May 1, 2026

Effects of Exposure of Formaldehyde to a Rat Model of Atopic Dermatitis Induced by Neonatal Capsaicin Treatment
Published on: September 27, 2017
Persistence of mild to moderate atopic dermatitis
Jacob S Margolis1, Katrina Abuabara2, Warren Bilker1
1Department of Biostatistics and Epidemiology, University of Pennsylvania Perelman School of Medicine, Philadelphia.
Importance:
Atopic dermatitis (AD) is a common illness of childhood.
Objective:
To evaluate the natural history of AD and determine the persistence of symptoms over time.
Design, Setting, And Participants:
A cross-sectional and cohort study of a nation-wide long-term registry of children with AD enrolled in the Pediatric Eczema Elective Registry (PEER).
Main Outcomes And Measures:
Self-reported outcome of whether a child's skin was AD symptom-free for 6 months at 6-month intervals.
Results:
A total of 7157 patients were enrolled in the PEER study for a total of 22,550 person-years. At least 2 years of follow-up were observed for 4248 children and at least 5 years of follow-up were observed for 2416 children. Multiple demographic and exposure variables were associated with more persistent AD. At every age (ie, 2-26 years), more than 80% of PEER participants had symptoms of AD and/or were using medication to treat their AD. It was not until age 20 years that 50% of patients had at least 1 lifetime 6-month symptom- and treatment-free period.
Conclusions And Relevance:
Based on this large longitudinal cohort study, symptoms associated with AD seem to persist well into the second decade of a child's life and likely longer. Atopic dermatitis is probably a life-long illness.
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