Association between allergen component sensitisation and clinical allergic disease in children
Main Article Content
Keywords
allergen component sensitisation, children, allergy, component-resolved diagnostics, IgE, sensitisation, specific IgE
Abstract
Background: Allergen component sensitisation testing is becoming increasingly important in the diagnosis of peanut allergy. The aim of the present study was to evaluate the relationship between sensitisation and symptoms of allergic disease in children by testing a large panel of inhalants, food allergens, and allergen components.
Methods: For 287 children visiting our laboratory for allergy testing, symptoms of allergic disease were recorded by standardised validated questionnaires. Specific IgE to 11 whole allergens was assessed by ImmunoCAP, and to 112 allergen components by ISAC ImmunoCAP assay. We used latent class analysis (LCA) to distinguish clinical phenotypes.
Results: Inhalant and food allergen sensitisation was common, irrespective of the children’s allergic symptom type. Less than 10% of the variance in symptom scores was explained by variations in the number of allergens (components) that the child was sensitised to. In LCA, 135 children (50.2%) had mild allergy, with few symptoms and sensitisation to no or few allergens, 74 children (27.5%) had more symptoms and sensitisation to inhalant allergens (respiratory allergy) and 60 children (22.3%) showed polysensitisation to a median of six allergens and had more severe symptoms of different organ systems. Adding allergen component test results to LCA failed to result in identifiable classes of allergic disease in children.
Conclusions: In this group of children with allergic symptoms, referred for allergy testing by their physician, broad screening for allergen component sensitisation did not contribute to distinguishing phenotypes of allergic disease.
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