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Total duration of sleep in stage 2 sleep from type I polysomnography
minstg2p under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables
Total time scored as stage 2, rounded to nearest minute (use calculated variable - sleep wake studies screened out)
Total duration of sleep in stage 3/4 sleep from type I polysomnography
mnstg34p under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables
Total time scored as stage 3/4, rounded to nearest minute (use calculated variable - sleep wake studies screened out)
Total duration of sleep in NREM sleep in supine position from type I polysomnography
nremepbp under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables
Total duration of sleep in NREM sleep in non-supine position from type I polysomnography
nremepop under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables
Total duration of sleep in REM sleep in supine position from type I polysomnography
remepbp under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables
Total time in rapid eye movement sleep (REM) with supine body position
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
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)
Total duration of sleep in stage 1 sleep from type I polysomnography
timest1 under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables
Total time scored as stage 1 rounded to nearest minute
Total duration of sleep in stage 2 sleep from type I polysomnography
timest2 under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables
Total time scored as stage 2 rounded to nearest minute
Total duration of sleep in stage 3/4 sleep from type I polysomnography
timest34 under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables
Total time scored as stage 3/4 rounded to nearest minute
Total duration of wake time during sleep period with oxygen saturation < 90% from type I polysomnography
sao90awk under Sleep Monitoring/Polysomnography/Oxygen Saturation in CFS variables
Total duration of wake time during sleep period with oxygen saturation > 92% from type I polysomnography
sao92awk under Sleep Monitoring/Polysomnography/Oxygen Saturation in CFS variables
Total time oxygen saturation above 92% during wake, in minutes
Total duration of sleep with oxygen saturation > 92% from type I polysomnography
sao92slp under Sleep Monitoring/Polysomnography/Oxygen Saturation in CFS variables
Total time oxygen saturation above 92% during sleep, in minutes
Total sleep duration in NREM sleep associated with oxygen saturation less than 85% from type I polysomnography
minspo2lt85nremduration under Sleep Monitoring/Polysomnography/Sleep Architecture in APPLES variables
Total sleep duration in REM sleep associated with oxygen saturation less than 85% from type I polysomnography
minspo2lt85remduration under Sleep Monitoring/Polysomnography/Sleep Architecture in APPLES variables
Total duration of wake time during sleep period with oxygen saturation < 90% from type I polysomnography
sao90awk under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables
Total time oxygen saturation (SaO2) < 90% in awake
Total duration of wake time during sleep period with oxygen saturation > 92% from type I polysomnography
sao92awk under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables
Total time oxygen saturation (SaO2) > 92 in awake
Total duration of sleep with oxygen saturation > 92% from type I polysomnography
sao92slp under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables
Total time oxygen saturation (SaO2) > 92 in sleep
Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography
oai_oa0u_f1t1 under Sleep Monitoring/Polysomnography in ABC variables
Calculated - Summary metric of sleep disordered breathing events.
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
oahi_oa0uhp3x3u_f1t1 under Sleep Monitoring/Polysomnography in ABC variables
Calculated - Summary metric of sleep disordered breathing events.
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
oahi_oa0uhp3x4r_f1t1 under Sleep Monitoring/Polysomnography in ABC variables
Calculated - Summary metric of sleep disordered breathing events.
Hypopnea Index: (hypopneas with > 30% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography
hi_hp3x0u_f1t1 under Sleep Monitoring/Polysomnography in ABC variables
Calculated - Summary metric of sleep disordered breathing events.
Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography
cai_ca0u_f1t1 under Sleep Monitoring/Polysomnography in ABC variables
Calculated - Summary metric of sleep disordered breathing events.
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
oahi_oa0uhp3x4u_f1t1 under Sleep Monitoring/Polysomnography in ABC variables
Calculated - Summary metric of sleep disordered breathing events. The definition of hypopnea events is consistent with the following clinical guidelines: (1) AASM 2012 update (alternative) Berry RB et al. 2012 (PubMed ID:23066376), and (2) AASM 2015 (acceptable) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.]. Search for all AHI variables consistent with the same clinical guidelines within this dataset
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