Acute respiratory health effects of air pollution on children with asthma in US inner cities

George T. O'Connor, Lucas Neas, Benjamin Vaughn, Meyer Kattan, Herman Mitchell, Ellen F. Crain, Richard Evans, Rebecca Gruchalla, Wayne Morgan, James Stout, G. Kenneth Adams, Morton Lippmann

Research output: Contribution to journalArticle

165 Scopus citations

Abstract

Background: Children with asthma in inner-city communities may be particularly vulnerable to adverse effects of air pollution because of their airways disease and exposure to relatively high levels of motor vehicle emissions. Objective: To investigate the association between fluctuations in outdoor air pollution and asthma morbidity among inner-city children with asthma. Methods: We analyzed data from 861 children with persistent asthma in 7 US urban communities who performed 2-week periods of twice-daily pulmonary function testing every 6 months for 2 years. Asthma symptom data were collected every 2 months. Daily pollution measurements were obtained from the Aerometric Information Retrieval System. The relationship of lung function and symptoms to fluctuations in pollutant concentrations was examined by using mixed models. Results: Almost all pollutant concentrations measured were below the National Ambient Air Quality Standards. In single-pollutant models, higher 5-day average concentrations of NO2, sulfur dioxide, and particles smaller than 2.5 μm were associated with significantly lower pulmonary function. Higher pollutant levels were independently associated with reduced lung function in a 3-pollutant model. Higher concentrations of NO2 and particles smaller than 2.5 μm were associated with asthma-related missed school days, and higher NO2 concentrations were associated with asthma symptoms. Conclusion: Among inner-city children with asthma, short-term increases in air pollutant concentrations below the National Ambient Air Quality Standards were associated with adverse respiratory health effects. The associations with NO2 suggest that motor vehicle emissions may be causing excess morbidity in this population.

Original languageEnglish (US)
Pages (from-to)1133-1139.e1
JournalJournal of Allergy and Clinical Immunology
Volume121
Issue number5
DOIs
StatePublished - May 2008

Keywords

  • Nitrogen dioxide
  • asthma in children
  • carbon monoxide
  • fine particle emissions
  • ozone
  • sulfur dioxide

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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