Health care and social care costs of pneumonia in Denmark: a register-based study of all citizens and patients with COPD in three municipalities.

Background: Pneumonia is a frequent lung infection and a serious illness, which is often diagnosed among patients hospitalized with acute exacerbations of COPD. The aim of this study was to estimate the attributable costs due to pneumonia among patients hospitalized with pneumonia compared to a matched general population control group without pneumonia hospitalization.

Methods: This study includes citizens older than 18 years from three municipalities (n=142,344).