Fig. 4From: Variable course of disease of rheumatoid arthritis-associated usual interstitial pneumonia compared to other subtypesThe most common comorbidities were hypertension, coronary artery disease (CAD), COPD, diabetes and heart failure, although asthma was also relatively common. COPD occurred more often in patients with UIP (13/37.1 % UIP vs. 4/16.7 % non-UIP, p = 0.088). CAD: coronary artery disease, COPD: chronic obstructive pulmonary disease, GER: gastroesophageal refluxBack to article page