Comorbid conditions as predictors of mortality in severe COPD - an eight-year follow-up cohort study.

Purpose: Co-morbidities are common in chronic obstructive pulmonary disease (COPD) and are associated with increased morbidity and mortality. The aim of the present study was to explore the prevalence of several comorbid conditions in severe COPD, and to investigate and compare their associations with long-term mortality.

Methods: In May 2011 to March 2012, 241 patients with COPD stage 3 or 4 were included in the study.