Prevalence of Chronic Obstructive Pulmonary Disease and Its Associated Risk Factors in Yunnan Province, China: A Population Based Cross-Sectional Study.

35 Both domestic and international studies 36–38 have shown a significant trend of higher COPD prevalence in males compared to females, and smoking, as the main risk factor for COPD, 39 has a significantly higher prevalence and smoking intensity in males compared to females, 4 which may be the main reason for the significant difference in COPD incidence between genders.

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