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Apnea Positive Pressure Long-term Efficacy Study

Name Label Folder
mwtmeansleeplatency
Maintenance of Wakefullness Test (MWT) Mean Sleep Latency (min)
Maintenance of Wakefullness Test (MWT) Mean Sleep Latency (min) Sleep Monitoring/Other Sleep Tests/Maintenance of Wakefulness Test (MWT)
mwtnumbertrials
Maintenance of Wakefullness Test (MWT) Number Trials
Maintenance of Wakefullness Test (MWT) Number Trials Sleep Monitoring/Other Sleep Tests/Maintenance of Wakefulness Test (MWT)
mwtsleeplatencyt1
Maintenance of Wakefullness Test (MWT) Sleep Latency Trial 1 (min)
Maintenance of Wakefullness Test (MWT) Sleep Latency Trial 1 (min) Sleep Monitoring/Other Sleep Tests/Maintenance of Wakefulness Test (MWT)
mwtsleeplatencyt2
Maintenance of Wakefullness Test (MWT) Sleep Latency Trial 2 (min)
Maintenance of Wakefullness Test (MWT) Sleep Latency Trial 2 (min) Sleep Monitoring/Other Sleep Tests/Maintenance of Wakefulness Test (MWT)
mwtsleeplatencyt3
Maintenance of Wakefullness Test (MWT) Sleep Latency Trial 3 (min)
Maintenance of Wakefullness Test (MWT) Sleep Latency Trial 3 (min) Sleep Monitoring/Other Sleep Tests/Maintenance of Wakefulness Test (MWT)
mwtsleeplatencyt4
Maintenance of Wakefullness Test (MWT) Sleep Latency Trial 4 (min)
Maintenance of Wakefullness Test (MWT) Sleep Latency Trial 4 (min) Sleep Monitoring/Other Sleep Tests/Maintenance of Wakefulness Test (MWT)
caindextstpsg
Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography
Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
hypindextstpsg
Hypopnea Index: (Hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
Hypopnea Index: (Hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events. The definition of hypopnea events is consistent with the following clinical guidelines: American Academy of Sleep Medicine (AASM) Chicago 1999 standard. Sleep 1999 (PubMed ID:10450601)

Search for all AHI variables consistent with the same clinical guidelines within this dataset

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
maindextstpsg
Mixed Apnea Index: (Mixed apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography
Mixed Apnea Index: (Mixed apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oaindextstpsg
Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography
Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdirempsgnum
Total number of respiratory events in REM from type I polysomnography
Total number of respiratory events in REM from type I polysomnography Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rditstpsg
Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography

Hypopneas are defined using two criteria: a > 50%, but <= 90% amplitude decrease from baseline of the nasal pressure signal; or if there was a clear amplitude reduction of the nasal pressure signal that did not reach the above criterion but it was associated with either an oxygen desaturation > 3% or an arousal, and the event duration was >= 10 seconds.

The definition of hypopnea events is consistent with the following clinical guidelines: American Academy of Sleep Medicine (AASM) Chicago 1999 standard. Sleep 1999 (PubMed ID:10450601)

Search for all AHI variables consistent with the same clinical guidelines within this dataset

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
arousalindexcalc
Arousal Index: Number of arousals per hour of sleep from type I polysomnography
Arousal Index: Number of arousals per hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Arousal
arousalnrem
Total number of arousals during NREM sleep from type I polysomnography
Total number of arousals during NREM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Arousal
arousalrem
Total number of arousals during REM sleep from type I polysomnography
Total number of arousals during REM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Arousal
plmcriteriaindex
PLM Index: number of periodic limb movements (PLM) per hour of sleep from type I polysomnography
PLM Index: number of periodic limb movements (PLM) per hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Limb Movements
avgspo2nrem
Average oxygen saturation in NREM sleep from type I polysomnography
Average oxygen saturation in NREM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
avgspo2rem
Average oxygen saturation in REM sleep from type I polysomnography
Average oxygen saturation in REM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
avgspo2wake
Average oxygen saturation while awake from type I polysomnography
Average oxygen saturation while awake from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
desatindexnrem
Oxygen Desaturation Index (NREM): Oxygen desaturation associated with respiratory events per hour of NREM sleep from type I polysomnography
Oxygen Desaturation Index (NREM): Oxygen desaturation associated with respiratory events per hour of NREM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
desatindexrem
Oxygen Desaturation Index (REM): Oxygen desaturation associated with respiratory events per hour of REM sleep from type I polysomnography
Oxygen Desaturation Index (REM): Oxygen desaturation associated with respiratory events per hour of REM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
desatindextot
Oxygen Desaturation Index: Oxygen desaturation associated with respiratory events per hour of sleep from type I polysomnography
Oxygen Desaturation Index: Oxygen desaturation associated with respiratory events per hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
minimumspo2qc
Minimum oxygen saturation nadir associated with respiratory events with NADIR QC as designated by the steering committee from type I polysomnography
Minimum oxygen saturation nadir associated with respiratory events with NADIR QC as designated by the steering committee from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
minimumspo2withoutscqc
Minimum oxygen saturation nadir associated with respiratory events without NADIR QC as designated by the steering committee from type I polysomnography
Minimum oxygen saturation nadir associated with respiratory events without NADIR QC as designated by the steering committee from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
rdinrempsg
Apnea-Hypopnea Index (NREM): (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep from type I polysomnography
Apnea-Hypopnea Index (NREM): (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
rdirempsg
Apnea-Hypopnea Index (REM): (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of REM sleep from type I polysomnography
Apnea-Hypopnea Index (REM): (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of REM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
rdirempsgden
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
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

PSG Total Minutes of REM sleep - REM RDI Denominator

Sleep Monitoring/Polysomnography/Respiratory Event Counts
remnumcapsg
Total number of central apneas with no oxygen desaturation threshold used and with or without arousal in REM sleep from type I polysomnography
Total number of central apneas with no oxygen desaturation threshold used and with or without arousal in REM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
remnumhyppsg
Total number of hypopneas in REM sleep: (hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) from type I polysomnography
Total number of hypopneas in REM sleep: (hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
remnummapsg
Total number of mixed apneas with no oxygen desaturation threshold used and with or without arousal in REM sleep from type I polysomnography
Total number of mixed apneas with no oxygen desaturation threshold used and with or without arousal in REM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
remnumoapsg
Total number of obstructive apneas with no oxygen desaturation threshold used and with or without arousal in REM sleep from type I polysomnography
Total number of obstructive apneas with no oxygen desaturation threshold used and with or without arousal in REM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
respnumcapsg
Total number of central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Total number of central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
respnumhyppsg
Total number of hypopneas: (hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) from type I polysomnography
Total number of hypopneas: (hypopneas with > 50% flow reduction and without oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
respnummapsg
Total number of mixed apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Total number of mixed apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
respnumoapsg
Total number of obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography
Total number of obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
minspo2lt85nremduration
Total sleep duration in NREM sleep associated with oxygen saturation less than 85% from type I polysomnography
Total sleep duration in NREM sleep associated with oxygen saturation less than 85% from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
minspo2lt85remduration
Total sleep duration in REM sleep associated with oxygen saturation less than 85% from type I polysomnography
Total sleep duration in REM sleep associated with oxygen saturation less than 85% from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
minspo2lt85totduration
Total sleep duration associated with oxygen saturation less than 85% from type I polysomnography
Total sleep duration associated with oxygen saturation less than 85% from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
minspo2lt85wakeduration
Total duration of wake in bed associated with oxygen saturation less than 85% from type I polysomnography
Total duration of wake in bed associated with oxygen saturation less than 85% from type I polysomnography

PSG Duration (min) of Wake where Oxygen Saturation Less than 85%

Sleep Monitoring/Polysomnography/Sleep Architecture
perspo2lt85tst
Percentage of sleep duration associated with oxygen saturation less than 85% from type I polysomnography
Percentage of sleep duration associated with oxygen saturation less than 85% from type I polysomnography

PSG Percent of Total Sleep Time Oxygen Saturation During Sleep Less than 85%

Sleep Monitoring/Polysomnography/Sleep Architecture
perspo2lt85tstnrem
Percentage of sleep duration in NREM sleep associated with oxygen saturation less than 85% from type I polysomnography
Percentage of sleep duration in NREM sleep associated with oxygen saturation less than 85% from type I polysomnography

PSG Percent of NREM Total Sleep Time Oxygen Saturation Less than 85%

Sleep Monitoring/Polysomnography/Sleep Architecture
perspo2lt85tstrem
Percentage of sleep duration in REM sleep associated with oxygen saturation less than 85% from type I polysomnography
Percentage of sleep duration in REM sleep associated with oxygen saturation less than 85% from type I polysomnography

PSG Percent of REM Total Sleep Time Oxygen Saturation Less than 85%

Sleep Monitoring/Polysomnography/Sleep Architecture
pertstrempsg
Percentage of REM sleep among total sleep duration from type I polysomnography
Percentage of REM sleep among total sleep duration from type I polysomnography

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

Sleep Monitoring/Polysomnography/Sleep Architecture
pertsts1psg
Percentage of stage 1 sleep among total sleep duration from type I polysomnography
Percentage of stage 1 sleep among total sleep duration from type I polysomnography

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

Sleep Monitoring/Polysomnography/Sleep Architecture
pertsts2psg
Percentage of stage 2 sleep among total sleep duration from type I polysomnography
Percentage of stage 2 sleep among total sleep duration from type I polysomnography

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

Sleep Monitoring/Polysomnography/Sleep Architecture
pertsts3psg
Percentage of stage 3 sleep among total sleep duration from type I polysomnography
Percentage of stage 3 sleep among total sleep duration from type I polysomnography

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

Sleep Monitoring/Polysomnography/Sleep Architecture
pertsts4psg
Percentage of stage 4 sleep among total sleep duration from type I polysomnography
Percentage of stage 4 sleep among total sleep duration from type I polysomnography

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

Sleep Monitoring/Polysomnography/Sleep Architecture
recordingdurpsg
Total period of recording from type I polysomnography
Total period of recording from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
sleepeffpsg
Sleep Efficiency: the ratio of total sleep duration (i.e., total sleep time) to in-bed period (i.e., time in bed) from type I polysomnography
Sleep Efficiency: the ratio of total sleep duration (i.e., total sleep time) to in-bed period (i.e., time in bed) from type I polysomnography

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep (i.e. total sleep time, TST), while in-bed period is the interval between lights off/in-bed time and lights on/out-bed time (i.e. time in bed, TIB). [100*(total sleep time) / (total time in bed)]

Sleep Monitoring/Polysomnography/Sleep Architecture
soflopsg
Sleep Latency: the interval between lights-out/in-bed time and sleep onset time from type I polysomnography
Sleep Latency: the interval between lights-out/in-bed time and sleep onset time from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
soremfsopsg
REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake from type I polysomnography
REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake from type I polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
tibpsg
Total In-bed Period: the interval between lights out/in-bed time and lights off/out-bed time from type I polysomnography
Total In-bed Period: the interval between lights out/in-bed time and lights off/out-bed time from type I polysomnography

Calculated. Conventionally this variable would be called time in bed (TIB).

Sleep Monitoring/Polysomnography/Sleep Architecture
tstpsg
Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from type I polysomnography
Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from type I polysomnography

Conventionally, this would be called total sleep time (TST) (i.e. total time spent in stage 1 or greater).

Sleep Monitoring/Polysomnography/Sleep Architecture
wasoqcpsg
Wake After Sleep Onset: the total duration between sleep onset and lights-on/out-bed time while being awake from type I polysomnography
Wake After Sleep Onset: the total duration between sleep onset and lights-on/out-bed time while being awake from type I polysomnography

Total amount of time spent awake after going to sleep [(time in bed) - (sleep latency) - (Total Sleep Time (TST))]

Sleep Monitoring/Polysomnography/Sleep Architecture