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Average oxygen desaturation: Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with no oxygen desaturation used and with or without arousal from type I polysomnography

avgdsevent under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

Average oxygen desaturation for all respiratory events with > 0% desat and with or without arousal in NREM sleep in supine position: Apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 50% flow reduction and > 0% oxygen desaturation and with or without arousal from type I polysomnography

avdnbp under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

Average oxygen desaturation for all respiratory events with > 0% desat and with or without arousal in NREM sleep in non-supine position: Apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 50% flow reduction and > 0% oxygen desaturation and with or without arousal from type I polysomnography

avdnop under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

Average oxygen desaturation for all respiratory events with > 0% desat and with or without arousal in REM sleep in supine position: Apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 50% flow reduction and > 0% oxygen desaturation and with or without arousal from type I polysomnography

avdrbp under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

Average oxygen desaturation for all respiratory events with > 0% desat and with or without arousal in REM sleep in non-supine position: Apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 50% flow reduction and > 0% oxygen desaturation and with or without arousal from type I polysomnography

avdrop under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables