Risk factors associated with in-hospital mortality in hospitalized patients with acute exacerbation of chronic obstructive pulmonary disease: a multicenter retrospective study.

Advanced age (>80 years), prolonged bed rest, chronic pulmonary heart disease, pneumonia, invasive mechanical ventilation, noninvasive mechanical ventilation, anemia, and calcitoninogen>0.5 ng/ml were independent risk factors for in-hospital mortality in patients hospitalized with AECOPD.