Short-Term Air Pollution and Incident Pneumonia. A Case-Crossover Study
Cheryl S Pirozzi1, Barbara E Jones1,2, James A VanDerslice3
11 Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine.
Annals of the American Thoracic Society
|December 29, 2017
Summary
Short-term exposure to air pollution, particularly fine particulate matter, significantly increases pneumonia risk and severity in older adults. Reducing pollution could prevent cases and lower healthcare costs.
Area of Science:
- Environmental Health
- Pulmonology
- Epidemiology
Background:
- The link between air pollution and pneumonia remains unclear.
- Utah's Wasatch Front experiences periodic high air pollution levels.
Purpose of the Study:
- To investigate the association between short-term air pollution exposure and pneumonia incidence and severity.
- To assess the impact of air pollution on pneumonia-related mortality and healthcare costs.
Main Methods:
- Case-crossover analysis of 4,336 pneumonia patients over two years.
- Examined exposure to PM2.5, NO2, and ozone against pneumonia cases, hospitalizations, severity, and mortality.
- Calculated cost impacts of reducing PM2.5 levels.
Main Results:
- Fine particulate matter (PM2.5) exposure was linked to increased pneumonia, severe cases, and mortality in adults aged 65+.
- Nitrogen dioxide (NO2) showed smaller associations with pneumonia and mortality.
- Ozone (O3) was associated with increased pneumonia incidence and severity in younger adults.
Conclusions:
- Short-term PM2.5 exposure is associated with increased pneumonia hospitalizations, severity, mortality, and healthcare costs in older adults.
- NO2 and O3 also modestly increase pneumonia risk and severity.
- Reducing PM2.5 could prevent pneumonia cases and associated medical costs.
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