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Fig. 4 | Respiratory Research

Fig. 4

From: Association of serum bilirubin level with lung function decline: a Korean community-based cohort study

Fig. 4

Average annual changes in FEV1/FVC ratio relative to the natural logarithm of serum bilirubin. Notes: Bilirubin is expressed in mg/dL in parentheses. a Univariate relationship (linear regression coefficienct = 2.64) and b relationship adjusted for age, sex, BMI, FEV1/FVC ratio at baseline, and smoking status (current smoker, former smoker, and never-smoker)(linear regression coefficienct = 1.69). Abbreviations: BMI, body mass index; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity

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