COPD, chronic obstructive pulmonary disease; 72 (7.3%) patients with COPD and 118 (3.7%) patients without COPD had more than one cause of community-acquired pneumonia. Etiology of pneumonia by study g
CCP: cyclic citrullinated protein/peptide antibodies; CI: confidence interval; HR: hazard ratios; RA: rheumatoid arthritis. *Adjusted for sex, age at RA diagnosis and traditional CV risk factors (hype
