Data collection for PSG was standardized among various manufactured instruments by use of standardized collection and display montages. Each unit used for collection was certified before use to maximize signal quality integrity throughout the EDF conversion and import into Compumedics Profusion software used for scoring.
Raw polysomnography data are available for 5,793 subjects at SHHS Visit 1 and 2,651 subjects at SHHS Visit 2. 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.