Air Pollution and Asthma in Children
Author Information
Author(s): Delfino Ralph J., Staimer Norbert, Gillen Dan, Tjoa Thomas, Sioutas Constantinos, Fung Kochy, George Steven C., Kleinman Michael T.
Primary Institution: University of California, Irvine
Hypothesis
Airway inflammation in asthmatic children as measured by FeNO would be positively associated with personal exposure to PM2.5, elemental and organic carbon fractions of PM2.5 (EC and OC), and NO2.
Conclusion
Air pollution increases inflammation in children with asthma, and using only ambient mass-based methods may miss important pollutant components.
Supporting Evidence
- FeNO is a noninvasive biomarker of airway inflammation and is higher in subjects with poorly controlled asthma.
- Personal and ambient exposures to air pollutants were positively associated with FeNO levels.
- Children not taking anti-inflammatory medications had higher mean FeNO levels.
Takeaway
Breathing in dirty air can make kids with asthma feel worse, and we need to look at specific types of air pollution to understand how it affects them.
Methodology
The study followed 45 schoolchildren with asthma over 10 days, measuring their exhaled nitric oxide and personal exposure to various air pollutants.
Potential Biases
Potential misclassification of personal exposure may have affected the results.
Limitations
The study relied on surrogate markers of pollutant components and had limited information on sources.
Participant Demographics
Participants were schoolchildren aged 9-18 years with persistent asthma, including 31 males and 14 females.
Statistical Information
P-Value
0.024
Confidence Interval
95% CI, 0.1–1.9
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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