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Polysomnography (PSG) Quality Assessment: Arousals unreliable (Rapid eye movement sleep (REM))

remarunrel under Sleep Monitoring/Polysomnography/Signal Quality in SOF variables

Due to signal problems, scorer was unable to reliably assess arousals in stage rapid eye movement sleep (REM). The scoring of arousals in stage rapid eye movement sleep (REM) was determined to be unreliable.

REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake from type II polysomnography

remlaip under Sleep Monitoring/Polysomnography/Sleep Architecture in SOF variables

MSLT: Latency to REM (Nap 1)

nap1_rem under Sleep Monitoring/Other Sleep Tests/Multiple Sleep Latency Test (MSLT) in WSC variables

Variable from a Multiple Sleep Latency Test (MSLT), Roehrs & Roth 1992 (PubMed ID: 1552009).Search for all Multiple Sleep Latency Test variables within this dataset

MSLT: Latency to REM (Nap 2)

nap2_rem under Sleep Monitoring/Other Sleep Tests/Multiple Sleep Latency Test (MSLT) in WSC variables

Variable from a Multiple Sleep Latency Test (MSLT), Roehrs & Roth 1992 (PubMed ID: 1552009).Search for all Multiple Sleep Latency Test variables within this dataset

MSLT: Latency to REM (Nap 3)

nap3_rem under Sleep Monitoring/Other Sleep Tests/Multiple Sleep Latency Test (MSLT) in WSC variables

Variable from a Multiple Sleep Latency Test (MSLT), Roehrs & Roth 1992 (PubMed ID: 1552009).Search for all Multiple Sleep Latency Test variables within this dataset

MSLT: Latency to REM (Nap 4)

nap4_rem under Sleep Monitoring/Other Sleep Tests/Multiple Sleep Latency Test (MSLT) in WSC variables

Variable from a Multiple Sleep Latency Test (MSLT), Roehrs & Roth 1992 (PubMed ID: 1552009).Search for all Multiple Sleep Latency Test variables within this dataset

Apnea-Hypopnea Index (REM): (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 REM sleep from type I polysomnography

remahi under Sleep Monitoring/Polysomnography in WSC variables

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

Average ORP During REM

avg_orp_rem under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Average Odds Ratio Product (ORP) in all 30-s epochs during manually scored sleep stages. ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep, a value of 2.5 indicates full wakefulness. Search for all EEG variables within this dataset

Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Arousals unreliable (Rapid eye movement sleep (REM))

remarunrel under Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 in SHHS variables

Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): rapid eye movement sleep (REM)/non-rapid eye movement sleep (NREM) Scoring unreliable

remnrempr under Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 in SHHS variables

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

REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake from type II polysomnography

remlaip under Sleep Monitoring/Polysomnography/Sleep Architecture in SHHS variables

PSG Quality Assessment: Arousals unreliable (REM)

remarunrel under Sleep Monitoring/Polysomnography/Signal Quality in CCSHS variables

Due to signal problems, scorer was unable to reliably assess arousals in stage REM. The scoring of arousals in stage REM was determined to be unreliable.

REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake from type I polysomnography

remlaip under Sleep Monitoring/Polysomnography/Sleep Architecture in CCSHS variables

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

timerem under Sleep Monitoring/Polysomnography/Sleep Architecture in CCSHS variables

Total time scored as rapid eye movement sleep (REM) rounded to nearest minute

Minimum oxygen saturation in REM sleep from type I polysomnography

losao2r under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

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

Scoring arousals in rapid eye movement sleep (REM) (only) unreliable

remarunrel under Sleep Monitoring/Polysomnography/Signal Quality in CHAT variables

1=arousals in rapid eye movement sleep (REM) unreliable (when EMG is artifactual or absent during all or rapid eye movement sleep (REM) portion of the study)

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

minremp under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables

Total time scored as rapid eye movement sleep (REM), rounded to nearest minute (use calculated variable - sleep wake studies screened out)

REM Sleep Latency: the interval between the first sleep epoch and REM sleep excluding wake from type I polysomnography

remlaiip under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables

Total sleep time from beginning of sleep to first epoch of rapid eye movement sleep (REM) (excluding wake)

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

timerem under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables

Total time scored as rapid eye movement sleep (REM)

Percentage of REM sleep among total sleep duration from type I polysomnography

timeremp under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables

Conventionally, total sleep duration would be called total sleep time (TST).Percent of sleep time in rapid eye movement sleep (REM) [100*(number of minutes scored as rapid eye movement sleep (REM)) / (Total Sleep Time (TST))] * 100

Percentage of snore time in rapid eye movement sleep (REM) (decibel (dB) level 5)

prdb5slp under Sleep Monitoring/Polysomnography/Sound Events in CHAT variables

[(Total time snore at decibel (dB) level 5 in rapid eye movement sleep (REM)) / (total time rapid eye movement sleep (REM))] * 100

Percentage of REM sleep among total sleep duration from type I polysomnography

pct_rem under Sleep Monitoring/Polysomnography/Sleep Architecture in APOE variables

Conventionally, total sleep duration would be called total sleep time (TST).

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

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

Calculated - Summary metric of sleep disordered breathing events.

Central Apnea Index (REM, Supine) : (Central apneas with >= 2% oxygen desaturation or with arousal) / hour of REM sleep in supine position from type I polysomnography

cardrba2 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CFS variables

Calculated - Summary metric of sleep disordered breathing events.

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

cardrba3 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CFS variables

Calculated - Summary metric of sleep disordered breathing events.