CAT Score, mMRC score, the frequency of acute exacerbation in the past year, the frequency of hospitalization in the past year, body mass index (BMI), neck circumference, waist circumference, Epworth Score, STOP-BANG version Vietnam Score, pulmonary artery pressure, the prevalence of hypertension were all significantly higher in the COPD-OSA group compared with the COPD group (p<0.05).