Fig. 1From: Severity distribution and treatment of chronic obstructive pulmonary disease in China: baseline results of an observational studySeverity distribution of COPD across six geographical regions in China. A Distribution of airway limitation stages. B Distribution of Group A‒D assessed as per GOLD 2016. Percentages of patients in each group are indicated. COPD chronic obstructive pulmonary disease, GOLD global initiative for chronic obstructive lung diseaseBack to article page