Rationale: Little is known about the long-term outcomes of individuals with mild/moderate
chronic obstructive pulmonary disease (COPD) according to spirometric criteria. Objectives …

Background Never smokers comprise a substantial proportion of patients with COPD. Their
characteristics and possible risk factors in this population are not yet well defined. Methods …

Background: The Global Initiative on Obstructive Lung Disease stages for chronic
obstructive pulmonary disease (COPD) uses a fixed ratio of the post-bronchodilator forced …

Rationale: Few studies have investigated the factors associated with the early inception of
chronic obstructive pulmonary disease (COPD). Objectives: We investigated COPD risk …

Background Prevalence of COPD is increasing worldwide, and there is need for regularly
updated estimates of COPD prevalence and risk factors. Methods In the Norwegian …

Rationale: Randomized controlled trials only include a subset of patients with chronic
obstructive pulmonary disease (COPD) fulfilling strict inclusion criteria. Thus, most patients …

Background and objective The global burden of chronic obstructive pulmonary disease
(COPD) is increasing and COPD patients are at higher risk for all‐cause mortality. We aimed …

INTRODUCTION: No recent Canadian studies with physician‐and spirometry‐confirmed
diagnosis of chronic obstructive pulmonary disease (COPD) that assessed the burden of …

Background: Chronic obstructive pulmonary disease is a chronic, often progressive disease,
which in most patients is caused by tobacco smoking. Our study focuses on differences in …

Background It is unclear whether patients with Global Initiative for Chronic Obstructive Lung
Disease stage 1 (mild) chronic obstructive pulmonary disease (COPD) have worse …