[Relation between asthma and atopy markers in children and young adults]

A Pereira Vega1, J L Sánchez Ramos, J A Maldonado Pérez

  • 1Sección de Neumología, Hospital Juan Ramón Jiménez, Huelva.

Insights

Atopy markers, total IgE level and skin tests, relate differently to childhood and adult asthma. Skin tests are more indicative in children, while IgE levels are more relevant in adults.

Area of Science:

  • Allergy and Immunology
  • Respiratory Medicine
  • Pediatric Pulmonology

Background:

  • Atopy is a key factor in allergic diseases, including bronchial asthma.
  • Understanding age-specific relationships between atopy markers and asthma is crucial for diagnosis and management.
  • Previous research suggests potential differences in atopy's role across age groups.

Purpose of the Study:

  • To investigate whether atopy, assessed by total IgE level and skin test reactivity, is associated with bronchial asthma similarly in children and young adults.
  • To determine the differential utility of IgE levels and skin tests in diagnosing asthma across different age demographics.

Main Methods:

  • A cross-sectional study involving 353 children (11-15 years) and 208 adults (20-44 years) from Huelva, Spain.
  • Subjects completed respiratory symptom questionnaires (ECRHS) and underwent methacholine challenge tests (MT).
  • Atopy was measured via total IgE levels (IgEt) and skin tests (ST); bronchial asthma was defined by recent wheezing and positive ST.

Main Results:

  • Asthma prevalence was 4.5% in children and 5.3% in adults.
  • Multiple regression analysis revealed skin tests (ST) were significantly related to asthma in children (p=0.023), while IgE levels (IgEt) were significant in adults (p=0.0005).
  • IgE levels showed better discrimination in adults (sensitivity 90.9%), whereas ST was more useful in children.

Conclusions:

  • The relationship between atopy markers and bronchial asthma differs significantly between children and adults.
  • Skin test reactivity is a more relevant indicator of asthma in children.
  • Total IgE levels are more indicative of asthma in adults, suggesting age-specific diagnostic approaches.

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