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Schmidt, F.* ; Hose, A.J. ; Mueller-Rompa, S.* ; Brick, T.* ; Hämäläinen, A.M.* ; Peet, A.* ; Tillmann, V.* ; Niemelä, O.* ; Siljander, H.* ; Knip, M.* ; Weber, J.* ; Von Mutius, E.* ; Ege, M.J.*

Development of atopic sensitization in Finnish and Estonian children: A latent class analysis in a multicenter cohort.

J. Allergy Clin. Immunol. 143, 1904-1913.e9 (2019)
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Background: The prevalence of atopy is associated with a Western lifestyle, as shown by studies comparing neighboring regions with different socioeconomic backgrounds. Atopy might reflect various conditions differing in their susceptibility to environmental factors.Objective: We sought to define phenotypes of atopic sensitization in early childhood and examine their association with allergic diseases and hereditary background in Finland and Estonia.Methods: The analysis included 1603 Finnish and 1657 Estonian children from the DIABIMMUNE multicenter young children cohort. Specific IgE levels were measured at age 3, 4, and 5 years, respectively, and categorized into 3 CAP classes. Latent class analysis was performed with the statistical software package poLCA in R software.Results: Both populations differed in terms of socioeconomic status and environmental determinants, such as pet ownership, farm-related exposure, time spent playing outdoors, and prevalence of allergic diseases (all P <.001). Nevertheless, we found similar latent classes in both populations: an unsensitized class, a food class, 2 inhalant classes differentiating between seasonal and perennial aeroallergens, and a severe atopy class. The latter was characterized by high total and specific IgE levels and strongly associated with wheeze (odds ratio [OR], 5.64 [95% CI, 3.07-10.52] and 4.56 [95% CI, 2.35-8.52]), allergic rhinitis (OR, 22.4 [95% CI, 11.67-44.54] and 13.97 [95% CI, 7.33-26.4]), and atopic eczema (OR, 9.39 [95% CI, 4.9-19.3] and 9.5 [95% CI, 5.2-17.5] for Finland and Estonia, respectively). Environmental differences were reflected in the larger seasonal inhalant atopy class in Finland, although composition of classes was comparable between countries.Conclusion: Despite profound differences in environmental exposures, there might exist genuine patterns of atopic sensitization. The distribution of these patterns might determine the contribution of atopic sensitization to disease onset.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Latent Class Analysis ; Unsupervised Clustering ; Ige ; Atopy ; Allergy ; Diabetes Type 1 Risk ; Wheezing ; Finland ; Estonia ; Severe Atopy; Beta-cell Autoimmunity; Serum Ige Levels; Allergic Sensitization; Environmental-factors; Inhalant Allergens; Russian Karelia; Asthma; Childhood; Association; Phenotypes
ISSN (print) / ISBN 0091-6749
e-ISSN 1097-6825
Quellenangaben Volume: 143, Issue: 5, Pages: 1904-1913.e9 Article Number: , Supplement: ,
Publisher Elsevier
Publishing Place Amsterdam [u.a.]
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Asthma and Allergy Prevention (IAP)