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Acute effects of summer air pollution on respiratory symptom reporting in children

J Schwartz1, D W Dockery, L M Neas

  • 1U.S. Environmental Protection Agency, Washington, DC.

American Journal of Respiratory and Critical Care Medicine
|November 1, 1994
PubMed

Insights

This study found that inhalable particles (PM10) in air pollution are linked to increased coughing and lower respiratory symptoms in school children. PM10 was a better predictor than other pollution measures for respiratory illness.

Area of Science:

  • Environmental Health
  • Pediatric Respiratory Medicine
  • Air Quality Science

Background:

  • Ambient air pollution is a significant environmental exposure.
  • Respiratory illnesses are common among school-aged children.
  • Understanding pollution's impact on child respiratory health is crucial.

Purpose of the Study:

  • To investigate the association between specific ambient air pollutants and respiratory symptoms in school children.
  • To evaluate the predictive value of different particulate matter metrics for respiratory illness.

Main Methods:

  • A daily symptom diary was maintained by parents of 1,844 school children across six U.S. cities over one year.
  • Daily measurements of sulfur dioxide, nitrogen dioxide, ozone, PM10, PM2.5, light scattering, and aerosol acidity were collected.
  • Analysis focused on warm season months (April-August).

Main Results:

  • Significant associations were observed between inhalable particles (PM10) and the incidence of coughing and lower respiratory symptoms.
  • A marginally significant association was found between PM10 and upper respiratory symptoms.
  • Sulfur dioxide and ozone also showed significant associations with cough and lower respiratory symptoms in single-pollutant models.

Conclusions:

  • Inhalable particles (PM10) are significantly associated with increased respiratory symptoms in children.
  • PM10 appears to be a key indicator of air pollution's impact on pediatric respiratory health.
  • Further research may clarify the role of specific pollutants and refine exposure metrics.

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