nrem - Search - Sleep Data - National Sleep Research Resource

Arousal Index (NREM): Number of arousals per hour of NREM sleep from type II polysomnography

ai_nrem under Sleep Monitoring/Polysomnography/Arousals in SOF variables

Total arousals in non-rapid eye movement sleep (NREM) per hours of non-rapid eye movement sleep (NREM)

Total Sleep Duration (NREM): the interval between sleep onset time and lights on/out-bed time while the participant is in NREM sleep from type I polysomnography

tst_nrem under Sleep Monitoring/Polysomnography in WSC variables

Total time spent in NREM sleep

Avg ORP Last 120 min NREM

avg_orp_last120m_nrem under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Used (along with :min_orp_firsthalf_nrem:) to calculate :diff_orp:. Search for all EEG variables within this dataset

Min ORP First Half NREM

min_orp_firsthalf_nrem under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Used (along with :avg_orp_last120m_nrem:) to calculate :diff_orp:. Search for all EEG variables within this dataset

Apnea-Hypopnea Index (NREM): (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) / hours of NREM sleep from type I polysomnography

rdimnr0p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at all desaturations [(total number of apneas and hypopneas in non-rapid eye movement sleep (NREM)) / (hours of non-rapid eye movement sleep (NREM))]

Arousal Index (NREM): number of arousals per hour of NREM sleep from type I polysomnography

ai_nrem under Sleep Monitoring/Polysomnography/Arousal in CFS variables

Arousal Index (NREM): Arousals per hour of NREM sleep from type II polysomnography

ai_nrem under Sleep Monitoring/Polysomnography/Arousals in SHHS variables

Apnea-Hypopnea Index (NREM): (Apneas with >= 2% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 2% oxygen desaturation used and with or without arousal) / hours of NREM sleep from type I polysomnography

rdimnr2p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas in non-rapid eye movement sleep (NREM) associated with >= 2% desaturation) / (hours of non-rapid eye movement sleep (NREM))]

Apnea-Hypopnea Index (NREM): (Apneas with >= 3% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used and with or without arousal) / hours of NREM sleep from type I polysomnography

rdimnr3p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas in non-rapid eye movement sleep (NREM) associated with >= 3% desaturation) / (hours of non-rapid eye movement sleep (NREM))]

Apnea-Hypopnea Index (NREM): (Apneas with >= 5% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 5% oxygen desaturation used and with or without arousal) / hours of NREM sleep from type I polysomnography

rdimnr5p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas in non-rapid eye movement sleep (NREM) associated with >= 5% desaturation) / (hours of non-rapid eye movement sleep (NREM))]

Arousal Index (NREM): number of arousals per hour of NREM sleep from type I polysomnography

ai_nrem under Sleep Monitoring/Polysomnography/Arousals in CHAT variables

Apnea-Hypopnea Index (NREM): (Apneas with no oxygen desaturation threshold used and with or without arousal and hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal)/ hours of NREM sleep from type I polysomnography

rdinr3p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CFS variables

Calculated - Summary metric of sleep disordered breathing events during NREM sleep

Apnea-Hypopnea Index (NREM): (Apneas with no oxygen desaturation threshold used and with or without arousal and hypopneas with discernible flow reduction and with >= 3% oxygen desaturation and with or without arousal)/ hours of NREM sleep from type I polysomnography

nremahi under Sleep Monitoring/Polysomnography in WSC variables

Calculated - Summary metric of sleep disordered breathing events during NREM sleep

Change in ORP across the night

diff_orp under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Change in Odds Ratio Product (ORP) across the night, a greater increase in ORP from the beginning of to end of the night suggests more restorative sleep. Younes et al. 2020 (PubMed ID: 32729619). Source: :avg_orp_last120m_nrem: and :min_orp_firsthalf_nrem:. Search for all EEG variables within this dataset

Apnea-Hypopnea Index (NREM): (Apneas with >= 4% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 4% oxygen desaturation used and with or without arousal) / hours of NREM sleep from type I polysomnography

rdimnr4p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas in non-rapid eye movement sleep associated with >= 4% desaturation) / (hours of non-rapid eye movement sleep (NREM))]

Minimum oxygen saturation in NREM sleep from type I polysomnography

losao2nr under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

Lowest oxygen saturation (SaO2) in non-rapid eye movement sleep (NREM) [minimum (all oxygen saturation (SaO2) values in non-rapid eye movement sleep (NREM))]

Central Apnea Index (NREM, Supine) : (Central apneas with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in supine position from type I polysomnography

cardnba under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CFS variables