Association between allergy and asthma from childhood to middle adulthood in an Australian cohort study

R Wolfe1, J B Carlin, H Oswald

  • 1Clinical Epidemiology and Biostatistics Unit, Murdoch Children's Research Institute, Melbourne, Victoria, Australia.

Insights

Childhood asthma and atopic conditions like eczema and hay fever are linked. Early atopic conditions increase the risk of severe asthma later in life, and childhood asthma severity correlates with later atopic conditions.

Area of Science:

  • Pediatric Allergy and Immunology
  • Respiratory Medicine
  • Epidemiology

Background:

  • Asthma and atopic conditions (eczema, hay fever) often coexist.
  • Longitudinal data on the association between childhood asthma and later atopic conditions are limited.

Purpose of the Study:

  • To investigate the long-term association between childhood asthma and the development/persistence of atopic conditions.
  • To quantify the relationship between childhood asthma severity and later atopic conditions.

Main Methods:

  • A cohort of 378 children with asthma was followed from age 7 to 35 years.
  • Data on asthma severity, eczema, hay fever, and skin test reactivity were collected every 7 years.
  • Statistical analysis, including odds ratios (OR) and 95% confidence intervals (CI), was used to assess associations.

Main Results:

  • Childhood atopic conditions were associated with increased odds of more severe asthma later in life (e.g., eczema OR=1.66, hay fever OR=1.39, skin test reactivity OR=2.25).
  • Childhood asthma severity correlated with increased odds of developing eczema and hay fever later in life.
  • Significant associations were observed between childhood asthma and later atopic conditions, with quantitative measures provided.

Conclusions:

  • Childhood asthma and atopic conditions exhibit a significant bidirectional association throughout development into adulthood.
  • Early identification and management of atopic conditions in asthmatic children may be crucial for long-term asthma outcomes.
  • This study provides novel quantitative insights into the complex interplay between asthma and atopy over time.

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