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

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))]

Is the sleep latency reliability?

sleep_latency under Sleep Monitoring/Polysomnography/Signal Quality/SHHS1 in SHHS variables

0: Unreliable 1:Reliable

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)

Baseline end-tidal carbon dioxide (ETCO2) asleep

co2blslp under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Baseline end-tidal carbon dioxide (ETCO2) asleep

rco2blslp under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

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

remnrempr under Sleep Monitoring/Polysomnography/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).

Polysomnography (PSG) Scoring Notes (Sleep Heart Health Study Visit One (SHHS1)): Scored Wake, non-rapid eye movement sleep (NREM), rapid eye movement sleep (REM) only

staging3 under Sleep Monitoring/Polysomnography/Signal Quality/SHHS1 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).

Peak end-tidal carbon dioxide (ETCO2) asleep

co2peak under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

LOG % Total Sleep Time (TST) with carbon dioxide (CO2) > 50 millimeters (mm) mercury (Hg)

lgpctco2g50 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Original source: MS 003

LOG % Total Sleep Time (TST) with carbon dioxide (CO2) > 50 millimeters (mm) mercury (Hg) (0 replaced with 0.0001)

lgpctco2g50_0 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Original source: MS 003

Peak end-tidal carbon dioxide (ETCO2) asleep

rco2peak under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Scoring stage wake/sleep unreliable

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

1=Sleep staging problem - scoring wake/sleep unreliable (when the clarity of the EEG makes distinguishing the transition unreliable)

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))]

Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg)

rpctco2g45 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg)

rpctco2g50 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Polysomnography (PSG) Quality Assessment: Stage 1/Stage 2 scoring unreliable

stg1stg2pr under Sleep Monitoring/Polysomnography/Signal Quality in SOF variables

Scorer noted that there was a problem differentiating stage 1 and stage 2 sleep.

Polysomnography (PSG) Quality Assessment: Stage 2/Stage 3-4 scoring unreliable

stg2stg3pr under Sleep Monitoring/Polysomnography/Signal Quality in SOF variables

Scorer noted that there was a problem differentiating stage 2 and stage 3/4 sleep.

Polysomnography (PSG) Quality Assessment: Wake/Sleep scoring unreliable

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

Scorer noted that there was a problem differentiating stage wake from stage sleep.

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))]

Average end-tidal carbon dioxide (ETCO2) in non-rapid eye movement sleep (NREM)

rco2avgnr under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg)

pctco2g45 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Percentage of Total Sleep Time (TST) end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg)

pctco2g50 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Urgent referral - oxygen saturation (SaO2) <90% >2% sleep time = 1 urgent ineligible

sa02lt90 under Sleep Monitoring/Polysomnography/Signal Quality in CHAT variables

*Note studies that have oximetry problems here