Figure 1
From: Low alanine aminotransferase as a risk factor for chronic obstructive pulmonary disease in males
Prevalence and incidence of COPD development over 13 years. Prevalence of COPD development over 13 years according to sex (A) and smoking status (B). Kaplan–Meier curves for the cumulative incidence of COPD development over 13 years according to the ALT group in all participants (C), males (D), females (E), never smokers (F), ex-smokers (G), and current smokers (H). ALT alanine aminotransferase, COPD chronic obstructive pulmonary disease. Adobe Illustrator version Creative Cloud was used to arrange the graphs and to add legends. (http://www.adobe.com/au/products/illustrator.html).
