The hypothesis of this study is: sleep disordered breathing (SDB), specifically, obstructive sleep apnea, is associated with poorer glucose in the existing type 2 diabetic condition.

In an exploration of this hypothesis, the investigators hope to provide evidence linking SDB to increased severity of disease in the type 2 diabetic patient. By doing so, the investigators ultimately seek to support investigating the use of SDB interventions as an additional method of care in the treatment of type 2 diabetes.

Inclusion Criteria:

• adult female and male patients with type 2 diabetes who are followed by University of Chicago physicians

Exclusion Criteria:

• patients with the diagnosis of type 1 diabetes (DM); newly diagnosed Type 2 DM patients
• patients with the diagnosis of OSA using CPAP for either 4 or more hours per night or 5 nights per week

Adult female and male patients with type 2 diabetes who are followed by University of Chicago physicians in the endocrinology or primary care clinic will self-identify themselves for participation in response to flyers posted at the check-in desk.