Solid Fuel Exposure and Chronic Obstructive Pulmonary Disease in Never-Smokers

Area of Science:

• Pulmonary Medicine
• Epidemiology
• Environmental Health

Background:

• Chronic obstructive pulmonary disease (COPD) presents a global public health challenge.
• COPD disproportionately impacts never-smokers, yet its specific causes in this group remain under-researched.
• Understanding COPD drivers in never-smokers is crucial for targeted public health interventions.

Purpose of the Study:

• To determine the prevalence of COPD among never-smokers in Western China.
• To identify key risk factors associated with COPD in never-smokers, with a focus on solid fuel exposure.
• To investigate the relationship between solid fuel exposure and small airway dysfunction.

Main Methods:

• A cross-sectional study involving 6,271 participants in Western China.
• COPD diagnosis based on spirometry: forced expiratory volume in 1 second/forced vital capacity < lower limits of normal (LLN).
• Statistical analyses included descriptive statistics and multivariable logistic regression.

Main Results:

• The prevalence of COPD among never-smokers was 15.0%.
• Significant independent predictors of COPD included advanced age (≥60 years), solid fuel exposure, rural living, and a history of tuberculosis.
• Solid fuel exposure was associated with a 69% increased likelihood of COPD (aOR 1.69) and a 35% increased likelihood of small airway dysfunction (aOR 1.35).

Conclusions:

• COPD poses a substantial health burden on never-smokers.
• Solid fuel exposure is a significant, modifiable risk factor for COPD and small airway dysfunction in never-smokers.
• Public health strategies should address solid fuel use to mitigate COPD risk in non-smoking populations.