Little is known about chronic obstructive pulmonary disease (COPD) in Chinese
nonsmokers. The present study aimed to investigate the profiles of COPD among …

Rationale: The prevalence of chronic obstructive pulmonary disease (COPD) in China is
largely unknown. Objectives: To obtain the COPD prevalence in China through a large …

Objectives: Despite high smoking rates, few prevalence studies of COPD have been
performed in Asia. The Nippon COPD Epidemiology (NICE) Study used spirometry to …

Chronic obstructive pulmonary disease (COPD) is an increasing cause of morbidity and
mortality worldwide, and it has been strongly correlated to tobacco smoking. While a number …

Objectives To investigate the prevalence of physician-diagnosed COPD and to explore the
relationship between the total amount of cigarettes smoked (TACS) and COPD among urban …

Background and objective: COPD has a variable natural history and not all individuals follow
the same course. The aim of this study was to assess the prevalence of COPD in the …

Background Although exposure to cigarette smoking and air pollution is common, the
current prevalence of chronic obstructive pulmonary disease (COPD) is unknown in the …

Background There is limited data on the risk factors and phenotypical characteristics
associated with spirometrically confirmed COPD in never-smokers in the general population …

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 …