The short-term goals of this study consider the abnormalities in biomarker levels associated with OSA and specific aspects of the disorder as well as whether the changes seen after surgical treatment of OSA mirror those demonstrated after efficacious non-surgical treatment. The long term goals are in two areas: 1) the development of measures to determine which patients require treatment for sleep-disordered breathing and to monitor the effectiveness of therapy, and 2) a deeper understanding of the connection between OSA and its adverse health consequences.