nrem - Search - Sleep Data - National Sleep Research Resource

Arousal index (Non-rapid eye movement sleep (NREM))

ai_nrem under Polysomnography (PSG)/Arousals in SOF variables

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

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))]

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

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/Arousal in CHAT variables

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

ai_nrem under Sleep Monitoring/Polysomnography/Arousals in SHHS variables

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

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))]

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

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

Polysomnography (PSG) Quality Assessment: Rapid eye movement sleep (REM)/Non-rapid eye movement sleep (NREM) scoring unreliable

remnrempr under Polysomnography (PSG)/Signal Quality in SOF variables

Scorer noted that there was a problem differentiating rapid eye movement sleep (REM) and non-rapid eye movement sleep (NREM).

Apnea-Hypopnea Index (NREM): (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of NREM sleep from type II polysomnography

ahi4p_nrem5 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

Apnea-Hypopnea Index (NREM): (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of NREM sleep from type II polysomnography

ahi4pa_nrem5 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

Central Apnea Index (NREM): (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep from type II polysomnography

cai0p_nrem5 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

Central Apnea Index (NREM, Supine): (Central apneas with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography

cardnba35 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

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 II polysomnography

cardnba5 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

Central Apnea Index (NREM, Supine): (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography

cardnbp5 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

Central Apnea Index (NREM, Non-Supine): (Central apneas with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type II polysomnography

cardnoa35 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

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

cardnoa5 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

Central Apnea Index (NREM, Non-Supine): (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in non-supine position from type II polysomnography

cardnop5 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

Hypopnea Index (NREM, Supine): (Hypopneas with > 50% flow reduction and no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography

hunrbp5 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

Hypopnea Index (NREM, Supine): (Hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography

hunrbpa35 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables