The primary objective of Aim 2 is to conduct a prospective observational study to evaluate the metabolomic changes in response to six months of positive airway pressure (PAP) treatment among OSA patients. Newly diagnosed OSA patients (AHI\>5) will undergo additional measurements including: accelerometer x one week (to inform the metabolomics), Type 2 home sleep test (to assist with OSA subtyping), next morning blood draw, 24-hour diet recall (to inform the metabolomics), questionnaires and PVT.
