The prevalence of chronic obstructive pulmonary disease in Uppsala, Sweden - the Burden of Obstructive Lung Disease (BOLD) study: Cross-sectional population-based study

Abstract

Objectives: To estimate chronic obstructive pulmonary disease (COPD) prevalence in Uppsala and the impact of risk factors on disease prevalence using the standardised methods of the Burden of Obstructive Lung Disease (BOLD) study initiative. Methods: Randomly selected participants, aged 40years or more (n=548) responded to a questionnaire regarding smoking habits, respiratory symptoms, medical history, and exposure to airway irritants. Spirometry, with a post-bronchodilator test, was performed and COPD defined as post-bronchodilatory forced expiratory volume in 1s (FEV 1)/forced vital capacity (FVC)<0.70 or FEV 1/FVC