Overnight, in-lab 14-channel polysomnography was performed using the Compumedics E-Series System (Abbotsford, Australia). Briefly, 14-channel polysomnography included monitoring the electroencephalogram, electrooculogram, electromyogram, oronasal flow by thermocouples and nasal pressure, thoracic and abdominal movement by inductance plethysmography, and oxyhemoglobin saturation by pulse oximetry. In addition to connection of sensors and electrodes, trained staff members completed signal calibrations and checked impedance. Nocturnal recordings were transmitted to the centralized reading center at Brigham and Women's Hospital and data were scored by trained technicians using current guidelines.
Raw polysomnography data are available for 735 Cleveland Family Study participants. Each recording has a signal file (.EDF) and two versions of the event scoring and epoch staging annotations (.XML).
NSRR XML files can be overlaid onto EDF signal files using the EDF Viewer tool. For more information about the XML translation (mapping) process, review the files available on the EDF Editor and Translator Releases page.