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-…

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

Background Asthma is a common chronic airway disease worldwide. Despite its large
population size, China has had no comprehensive study of the national prevalence, risk factors, …

Background Small airway dysfunction is a common but neglected respiratory abnormality.
Little is known about its prevalence, risk factors, and prognostic factors in China or anywhere …

Airway mucus hypersecretion is one of the most important characteristics of chronic airway
inflammatory diseases. Evaluating and managing airway mucus hypersecretion is of great …

The associations of long-term exposure to various constituents of fine particulate matter (≤2.5
μm in aerodynamic diameter, PM 2.5 ) air pollution with lung function were not clearly …

Background: Numerous studies have reported variable associations between ambient
particulate matter (PM) and chronic obstructive pulmonary disease (COPD) hospitalizations and …

Rationale: It remains unknown whether long-term ozone exposure can impair lung function.
Objectives: To investigate the associations between long-term ozone exposure and adult …

Objectives: COPD is characterized by progressive airway obstruction. Recent studies showed
that besides nitric oxide (NO) and carbon monoxide (CO), endogenous hydrogen sulfide (…

Background Increased oxidative stress and inflammation has a role in the pathogenesis of
chronic obstructive pulmonary disease (COPD). Drugs with antioxidant and anti-inflammatory …