This article is a correction to a study on the clinical characteristics and risk factors of overlapping COPD-OSA syndromes with the metabolic syndrome in mid- to high-altitude areas.[1] The prevalence of OSA in patients with COPD was 19.2%.[1] Patients with overlap syndrome had higher neck and waist circumferences compared to patients with COPD alone.[1] There were significant differences between groups in levels of blood pressure, lipid and glucose metabolism as well as inflammatory biomarkers.[1] The prevalence of metabolic syndrome was higher in the overlap group.[1] Multivariate logistic regression showed that BMI, sleep systolic blood pressure, and supine angiotensin levels were significant independent predictors of metabolic syndrome in the overlapping syndrome.[1] In the overlapping group, the prevalence of general obesity was up to 79.3%.[1] BMI has been shown to be a potential predictor of OSA independent of neck or waist circumference.[1]