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Observations on asthma

D V Bates1

  • 1Department of Health Care and Epidemiology, University of British Columbia, Vancouver, Canada.

Environmental Health Perspectives
|September 1, 1995
PubMed
Summary
This summary is machine-generated.

Elevated immunoglobulin E (IgE) is a key risk factor for childhood asthma. Environmental exposures and air pollutants like SO2, NO2, PM10, and ozone contribute to asthma

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Area of Science:

  • Pediatric Allergy and Immunology
  • Environmental Health
  • Pulmonology

Background:

  • Childhood asthma prevalence ranges from 4-8%, with higher rates in Black children, boys, and Puerto Rican children in the US.
  • Socioeconomic status influences healthcare access and morbidity, with low-income children relying more on emergency departments.
  • Adult nonatopic asthma is less understood, but viral infections and occupational exposures are implicated.

Purpose of the Study:

  • To review current understanding of asthma, focusing on risk factors, prevalence, and environmental influences.
  • To examine trends in asthma severity and healthcare utilization.
  • To explore the impact of air pollution on asthma exacerbations.

Main Methods:

  • Review of existing literature on asthma epidemiology, risk factors, and environmental triggers.

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  • Analysis of healthcare utilization patterns and morbidity data.
  • Examination of associations between air pollutants and asthma health effects.

    • Main Results:

    • Elevated IgE is the primary risk factor for childhood asthma; environmental exposures explain prevalence variations.
    • Hospital admissions for asthma have increased, suggesting worsening severity.
    • Air pollutants including SO2, NO2, PM10, ozone, and acid aerosols are linked to worsening asthma symptoms.

    Conclusions:

    • Childhood asthma is influenced by IgE levels and diverse environmental exposures.
    • Asthma severity appears to be increasing, potentially linked to air pollution.
    • Further research is needed on nonatopic asthma in adults and the precise role of environmental agents in prevalence.