2019 JAMA Air Pollution Study
• Association Between Long-term Exposure to Ambient
• Air Pollution and Change in Quantitatively Assessed
• Emphysema and Lung Function
IMPORTANCE While air pollutants at historical levels have been associated with cardiovascular
and respiratory diseases, it is not known whether exposure to contemporary air pollutant
concentrations is associated with progression of emphysema.
OBJECTIVE To assess the longitudinal association of ambient ozone (O3), fine particulate
matter (PM2.5), oxides of nitrogen (NOx), and black carbon exposure with change in percent
emphysema assessed via computed tomographic (CT) imaging and lung function.