Characteristics of patients with COPD who had Pseudomonas aeruginosa pneumonia and those patients with COPD with pneumonia non-caused by P. aeruginosa.

COPD, chronic obstructive pulmonary disease; IQR, interquartile range; PSI, pneumonia severity index.1Data available only for 345 patients. 2Data available for 740 patients. 3Patients were stratified into the following risk classes according to the PSI score: low risk (≤90 points, classes I, II, and III) and high risk (>90 points, classes IV and V).Characteristics of patients with COPD who had Pseudomonas aeruginosa pneumonia and those patients with COPD with pneumonia non-caused by P. aeruginosa.