Adv Clin Exp Med
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Chronic obstructive pulmonary disease (COPD) is associated with various comorbidities, which influence the course of COPD and worsen prognosis. ⋯ In a cohort of Polish COPD patients, the most frequent comorbidities were CVDs. The number of comorbidities affected the BODE index, but not airflow limitation. The BODE index is better than forced expiratory volume in 1 s (FEV1) in the rating of COPD patients' condition. The BMI correlated with the number of comorbidities as well as the number of hospitalizations for extra-pulmonary causes.