Skip to main content
Fig. 3 | BMC Pulmonary Medicine

Fig. 3

From: Association between elevated serum bilirubin levels with preserved lung function under conditions of exposure to air pollution

Fig. 3

a Assessment of FEV1 according to different levels of serum bilirubin under different NOx levels. FEV1 forced expiratory volume in 1 s, Nox nitrogen oxide. Y axis—mean level of FEV1 percent of predictive values. X axis—NOx level (low, medium and high; 0.4–14.0 ppm; 14.1–22.1 ppm and 22.2–33.5 ppm, respectively). Bilirubin level (mg/dL) divided according to low, moderate, and high serum bilirubin; 0.1–0.59 mg/dL, 0.6–0.8 mg/dL and 0.81–1.47 mg/dL, respectively. b Assessment of FEV1 according to different levels of serum bilirubin under different CO levels. FEV1 forced expiratory volume in 1 s, CO carbon monoxide. Y axis—mean level of FEV1 percent of predictive values. X axis—CO level (low 0.1–0.7 ppm; medium and high 8–0.9 ppm and 1–1.2 ppm). Bilirubin level (mg/dL) divided according to low, moderate, and high serum bilirubin; 0.1–0.59 mg/dL, 0.6–0.8 mg/dL and 0.81–1.47 mg/dL, respectively

Back to article page