Fig. 2
From: Association of air pollution exposure with exercise-induced oxygen desaturation in COPD
Exposure–response plots (left) and charts (right) showing the probability of exercise-induced desaturation in our study cohort (n = 141) upon exposure to varying concentration of A PM10, B PM2.5, C NO2, or D O3 over a period of 10 years. PM10 particulate matter of < 10 μm in aerodynamic diameter, PM2.5 particulate matter of < 2.5 μm in aerodynamic diameter, NO2 nitrogen dioxide, O3 ozone