In the article titled, “Obstructive Sleep Apnea Syndrome is Associated with Metabolic Syndrome among Adolescents and Youth in Beijing: Data from Beijing Child and Adolescent Metabolic Syndrome Study” published in pages 2278-2283, issue 17, vol. 128 of Chinese Medical Journal[1], the affiliation of the authors “Xiao-Xue Qu”, “Xiu-Juan Zhang”, “Shu-Jun Liu”, “Lian-Xia Li” and “Shan Gao” is written incorrectly as “Department of Endocrinology, Chaoyang Hospital, Capital Medical University, Beijing 100043, China” instead of “Department of Endocrinology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100043, China”.This has now been corrected and reposted online.