Fig. 2From: Prevalence of different comorbidities in COPD patients by gender and GOLD stage% prevalence of different respiratory disorders by gender: PNE, pneumonia; CRF, chronic respiratory failure; ACOS, asthma-Chronic obstructive pulmonary disease overlap syndrome; OSAS, obstructive sleep apnoea syndrome; B.Ect., bronchiectasys; PL, pleural effusion; otherBack to article page