Risk factors for severe COPD exacerbation in Chinese adults.

Area of Science:

• Respiratory Medicine
• Epidemiology
• Public Health

Background:

• Severe exacerbations are the primary driver of hospitalizations for Chronic Obstructive Pulmonary Disease (COPD).
• Identifying sex-specific risk factors is crucial for effective COPD management and prevention strategies.

Purpose of the Study:

• To investigate sex-specific risk factors associated with severe COPD exacerbations requiring hospitalization.
• To explore potential interactions between geographic region, smoking status, and age in relation to COPD exacerbations.

Main Methods:

• A cohort study utilizing data from 13,641 males and 13,051 females with spirometry-defined COPD from the China Kadoorie Biobank.
• Cox proportional hazards models were employed to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) for risk factors predicting severe exacerbations.

Main Results:

• Over 11.5 years, 5,967 COPD hospitalizations occurred. GOLD stage, smoking, and underweight were linked to hospitalization in both sexes.
• Females exhibited stronger associations for risk factors like a history of respiratory diseases (HR 2.47 vs. 1.87) and persistent morning cough/sputum (HR 1.65 vs. 1.46).
• Higher risks were observed in urban residents, non-current smokers, and individuals under 60 years old.

Conclusions:

• Findings highlight significant sex differences in COPD exacerbation risk factors.
• This research aids in identifying high-risk COPD patients for targeted interventions and timely management to reduce hospitalizations.