Factors associated with mortality in patients with COPD and pneumonia: univariate analysis.

DM, diabetes mellitus; FEV1: Forced expiratory volume in the first second; ICU: Intensive care unit; IQR, interquartile range; PSI, pneumonia severity index.1Data available only for 52 patients and 790 patients respectively; 2Patients 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).Factors associated with mortality in patients with COPD and pneumonia: univariate analysis.