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Asthma prevalence in 1973, 1988 and 2003.

M L Burr1, D Wat, C Evans

  • 1Department of Epidemiology, Statistics and Public Health, Wales College of Medicine, Cardiff University, Cardiff CF14 4XN, UK. burrml@cf.ac.uk

Thorax
|January 7, 2006
PubMed
Summary

The prevalence of childhood asthma symptoms continued to rise between 1988 and 2003. However, exercise-induced bronchoconstriction declined, likely due to increased use of inhaled corticosteroids for asthma management.

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Area of Science:

  • Pediatric respiratory health
  • Epidemiology of asthma
  • Public health surveillance

Background:

  • Previous surveys in 1973 and 1988 indicated a rising trend in childhood asthma prevalence.
  • The study aimed to determine if this increase continued beyond 1988.

Purpose of the Study:

  • To assess changes in asthma prevalence among 12-year-old children in South Wales since 1988.
  • To evaluate trends in exercise-induced symptoms and treatment patterns.

Main Methods:

  • A cross-sectional survey of 12-year-old children in South Wales was conducted in 2003.
  • Utilized parentally completed questionnaires and exercise challenge tests, consistent with prior surveys.
  • Bronchodilator use was restricted prior to testing.

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Main Results:

  • Reported wheeze and asthma prevalence continued to increase significantly between 1973, 1988, and 2003.
  • Wheeze related to running also showed a consistent rise.
  • Exercise-induced bronchoconstriction prevalence decreased by 2003, coinciding with a fourfold increase in inhaled corticosteroid use.

Conclusions:

  • The upward trend in childhood asthma symptoms has persisted.
  • The decline in exercise-induced bronchoconstriction suggests improved disease control through increased use of inhaled corticosteroids.
  • Asthma prevalence may have peaked in the 1990s, warranting further investigation.