Figure 1.

Associations of previous-day pollutant exposures and lung function. Associations are scaled per interquartile range difference in previous-day pollutant exposure. All models are adjusted for previous-day temperature, relative humidity, age, sex, race, height, weight, total pack-year smoking history, season, income, and education. FEV₁ = forced expiratory volume in 1 second; FVC = forced vital capacity; NO₂ = nitrogen dioxide; O₃ = ozone; PM_2.5 = particulate matter ⩽2.5 μm in aerodynamic diameter.