Indoor Air Pollution and COPD Morbidity in Rural Appalachian Cohorts
Sheila E Enoh1, Mildred Maisonet2, Kirsten Koehler3
1Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD.
Annals of the American Thoracic Society
|March 26, 2026
Summary
Household air pollution, especially fine particulate matter (PM2.5), significantly worsens Chronic Obstructive Pulmonary Disease (COPD) symptoms in rural Appalachia. Reducing indoor PM2.5 may improve respiratory health for these vulnerable populations.
Area of Science:
- Environmental Health
- Pulmonology
- Epidemiology
Background:
- Rural US regions face a growing burden of Chronic Obstructive Pulmonary Disease (COPD).
- Indoor environmental factors are modifiable contributors to COPD morbidity, yet underserved rural communities are understudied.
- Unique environmental exposures in rural areas may drive COPD prevalence.
Purpose of the Study:
- To determine if household air pollution significantly contributes to COPD morbidity in rural Appalachian communities.
- To analyze the association between indoor pollutant concentrations and COPD health outcomes in vulnerable populations.
Main Methods:
- Longitudinal environmental cohorts were established in two rural Appalachian sites.
- 184 paired clinical and environmental assessments were conducted over 6 months among former smokers with COPD.
- Indoor concentrations of fine particulate matter (PM2.5) and Nitrogen Dioxide (NO2) were measured and associated with COPD health measures.
Main Results:
- Mean indoor PM2.5 concentrations were 9.7 mg/m3; NO2 was rarely detected.
- Increased indoor PM2.5 was significantly associated with greater COPD morbidity (St. George's Respiratory Questionnaire) and dyspnea.
- PM2.5 exposure also correlated with increased cough and sputum production.
Conclusions:
- Indoor air pollution, particularly PM2.5, significantly contributes to respiratory morbidity in rural COPD patients.
- Reducing indoor PM2.5 exposure presents a potential modifiable target for improving COPD outcomes in rural areas.
- Further research and public health initiatives are needed to address indoor air pollution in rural regions.
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