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Urgent referral - oxygen saturation (SaO2) <92% >2% sleep time = 1 Surgeon alert
sa02lt92 under Sleep Monitoring/Polysomnography/Signal Quality in CHAT variables
*Note studies that have oximetry problems here
Average end-tidal carbon dioxide (ETCO2) in non-rapid eye movement sleep (NREM)
co2avgnr under Sleep Monitoring/Polysomnography/Capnography in CHAT 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))]
Average thoraco-abdominal asynchrony during scored-event-free non-rapid eye movement sleep (NREM) Stage 2
taa_n2 under Sleep Monitoring/Polysomnography/Thoraco-abdominal Asynchrony in CHAT variables
Average thoraco-abdominal asynchrony during scored-event-free non-rapid eye movement sleep (NREM) Stage 3
taa_n3 under Sleep Monitoring/Polysomnography/Thoraco-abdominal Asynchrony in CHAT variables
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Wake/Sleep Scoring unreliable
wakslepr under Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 in SHHS variables
Scorer noted that there was a problem differentiating stage wake from stage sleep.
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Unusual Staging
unustgou under Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 in SHHS variables
Scorer observed unusual sleep staging. This is noted when there is no sleep in any particular stage (eg. no rapid eye movement sleep (REM)).
Percentage of sleep time oxygen saturation (SaO2) is <= 90% change between baseline and follow-up
chg_pctsa90 under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables
Percentage of sleep time oxygen saturation (SaO2) is <= 95% change between baseline and follow-up
chg_pctsa95 under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables
Baseline end-tidal carbon dioxide (ETCO2) asleep (normalized for capnograph type)
nova_est_co2blslp under Sleep Monitoring/Polysomnography/Capnography in CHAT variables
Amount of non-rapid eye movement sleep (NREM) Stage 2 included in the total thoraco-abdominal asynchrony analysis
taa_n2_st under Sleep Monitoring/Polysomnography/Thoraco-abdominal Asynchrony in CHAT variables
Amount of non-rapid eye movement sleep (NREM) Stage 3 included in the total thoraco-abdominal asynchrony analysis
taa_n3_st under Sleep Monitoring/Polysomnography/Thoraco-abdominal Asynchrony in CHAT variables
Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg) (normalized for capnograph type)
nova_est_pctco2g45 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables
Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg) (normalized for capnograph type)
nova_est_pctco2g50 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables
Peak end-tidal carbon dioxide (ETCO2) asleep (normalized for capnograph type)
nova_est_co2peak under Sleep Monitoring/Polysomnography/Capnography in CHAT variables
Percentage of non-rapid eye movement sleep (NREM) Stage 2 included in the total thoraco-abdominal asynchrony analysis
taa_n2_pctst under Sleep Monitoring/Polysomnography/Thoraco-abdominal Asynchrony in CHAT variables
Percentage of non-rapid eye movement sleep (NREM) Stage 3 included in the total thoraco-abdominal asynchrony analysis
taa_n3_pctst under Sleep Monitoring/Polysomnography/Thoraco-abdominal Asynchrony in CHAT variables
The Aging Slow Wave
Posted by michaelprerau on November 29, 2021 in Guest Blogger
Article Citation McConnell, B. V., Kronberg, E., Teale, P. D., ...
Study scored sleep wake = 1, all sleep scored stage 2
slewake under Sleep Monitoring/Polysomnography/Signal Quality in CHAT variables
1=Study scored sleep wake
Total duration of sleep in REM sleep in non-supine position from type I polysomnography
remepop under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables
Total time in rapid eye movement sleep (REM) with non-supine body position
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Stage1/Stage2 Scoring unreliable
stg1stg2pr under Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 in SHHS variables
Scorer noted that there was a problem differentiating stage 1 and stage 2 sleep.
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Stage2/Stage3-4 Scoring unreliable
stg2stg3pr under Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 in SHHS variables
Scorer noted that there was a problem differentiating stage 2 and stage 3/4 sleep.
Average oxygen saturation in NREM sleep from type I polysomnography
saonrem under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables
Mean oxygen saturation (SaO2) during non-rapid eye movement sleep (NREM)
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