To follow up the progress of chronic complications in T2DM patients who had undergone anthropometric measurements, laboratory testing and standard overnight polysomnography monitor from 2013 to 2018.

Obstructive sleep apnea (OSA) is a common chronic sleep disorder and a frequent comorbidity in patients with type 2 diabetes. There has been increasing recognition that OSA is highly prevalent in persons with type 2 diabetes. This study is to explore the relationship between OSA and the progress of chronic diabetes-related complications in type 2 diabetes who had undergone anthropometric measurements, laboratory testing and standard overnight polysomnography monitor from 2013 to 2018 in the Department of Endocrinology and Diabetes, The First Affiliated Hospital of Xiamen University, Xiamen, China.

Inclusion Criteria:

• Type 2 diabetes
• Age：18-80

Exclusion Criteria:

• Patients with non type 2 diabetes mellitus
• Preparation for pregnancy
• Lactation patients
• Patients with uncontrolled thyroid disease
• Patients with severe cardiovascular disease
• Patients with severe hepatic and renal insufficiency
• Patients with oral and maxillofacial malformations and upper respiratory tract malformations
• Patients with pulmonary infection or COPD
• Patients who are not willing to accept the questionnaire survey
• Unable to sign informed consent

Patients with Type 2 diabetes

The datasets used and/or analyzed in this cohort are available from the corresponding author on reasonable request.