We use cookies and other tools to enhance your experience on our website and to analyze our web traffic.
For more information about these cookies and the data collected, please refer to our Privacy Policy.

Sleep Heart Health Study

Name Label Folder
ahi_a0h3
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_a0h3a
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). Berry RB et al. 2012 (PubMed ID:23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_a0h4
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_a0h4a
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_c0h3
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_c0h3a
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). Berry RB et al. 2012 (PubMed ID:23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_c0h4
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_c0h4a
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_o0h3
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_o0h3a
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). Berry RB et al. 2012 (PubMed ID:23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_o0h4
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_o0h4a
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cai0p
Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type II polysomnography
Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oai0p
Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type II polysomnography
Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdi0p
Apnea-Hypopnea Index: Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and with no oxygen desaturation used and with or without arousal / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and with no oxygen desaturation used and with or without arousal / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdi3p
Apnea-Hypopnea Index: Apneas with >=3% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and >=3% oxygen desaturation and with or without arousal / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: Apneas with >=3% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and >=3% oxygen desaturation and with or without arousal / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdi3pa
Apnea-Hypopnea Index: Apneas with >=3% oxygen desaturation or with arousal+ hypopneas with > 30% flow reduction and >=3% oxygen desaturation or with arousal / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: Apneas with >=3% oxygen desaturation or with arousal+ hypopneas with > 30% flow reduction and >=3% oxygen desaturation or with arousal / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdi4p
Apnea-Hypopnea Index: Apneas with >=4% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and >=4% oxygen desaturation and with or without arousal / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: Apneas with >=4% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and >=4% oxygen desaturation and with or without arousal / hour of sleep from type II polysomnography

Ratio of the count of all apneas (central and obstructive) and hypopneas associated with at least a >=4% oxygen desaturation to the total sleep time

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdinr3p
Apnea-Hypopnea Index (NREM): Apneas with >= 3% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal / hour of NREM sleep from type II polysomnography
Apnea-Hypopnea Index (NREM): Apneas with >= 3% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal / hour of NREM sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdirem3p
Apnea-Hypopnea Index (REM): Apneas with >= 3% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal / hour of REM sleep from type II polysomnography
Apnea-Hypopnea Index (REM): Apneas with >= 3% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal / hour of REM sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ai_all
Arousal Index: Arousals per hour of sleep from type II polysomnography
Arousal Index: Arousals per hour of sleep from type II polysomnography

Total number of arousals per hour of sleep. Ratio of count of arousals to total sleep time in hours.

Sleep Monitoring/Polysomnography/Arousals
avgsat
Average oxygen saturation during total sleep duration from type II polysomnography
Average oxygen saturation during total sleep duration from type II polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
minsat
Minimum oxygen saturation during total sleep duration from type II polysomnography
Minimum oxygen saturation during total sleep duration from type II polysomnography

Lowest oxygen saturation (SaO2)% during sleep

Sleep Monitoring/Polysomnography/Oxygen Saturation
overall_shhs2
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Overall signal quality
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Overall signal quality

Overall study grade as assigned by scorer. These codes reflected the total duration of useable (artifact free, scorable) signals during sleep time across channels, weighing those signals most critical for accurate scoring of respiratory events and staging during sleep time. The Quality Assessment Form for SHHS2 was modified so that the overall quality grade and the signal quality codes were based on signals during sleep time. Since events were only scored during sleep time this provided a more accurate assessment of signal quality during the actual time or scoring. This change would only have affected the quality grade of a small number of studies in SHHS1 where there was a significant amount of time awake with very good signals combined with very poor signals that occurred during sleep. The overall and signal quality grades are comparable between SHHS1 and SHHS2.

Sleep Monitoring/Polysomnography/Signal Quality/SHHS2
nsupinep
Percentage of total sleep duration in non-supine position from type II polysomnography
Percentage of total sleep duration in non-supine position from type II polysomnography

Percent of sleep time in non-supine body position

Sleep Monitoring/Polysomnography/Sleep Architecture
slpeffp
Sleep Maintenance Efficiency: the proportion of sleep duration in sleep period from type II polysomnography
Sleep Maintenance Efficiency: the proportion of sleep duration in sleep period from type II polysomnography

Sleep duration (i.e. total sleep time, TST) is the interval between sleep onset and sleep offset time while asleep. Sleep period is just the interval between sleep onset and sleep offset time.

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

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

Sleep Monitoring/Polysomnography/Sleep Architecture
supinep
Percentage of total sleep duration in supine position from type II polysomnography
Percentage of total sleep duration in supine position from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
timeremp
Percentage of total sleep duration in REM from type II polysomnography
Percentage of total sleep duration in REM from type II polysomnography

The ratio of time in rapid eye movement sleep (REM) to total sleep time, expressed as a percentage.

Sleep Monitoring/Polysomnography/Sleep Architecture
times34p
Percentage of total sleep duration in stage 3 and 4 from type II polysomnography
Percentage of total sleep duration in stage 3 and 4 from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
timest1p
Percentage of total sleep duration in stage 1 from type II polysomnography
Percentage of total sleep duration in stage 1 from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
timest2p
Percentage of total sleep duration in stage 2 from type II polysomnography
Percentage of total sleep duration in stage 2 from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
waso
Wake after Sleep Onset: the total duration between sleep onset and sleep offset time while being awake from type II polysomnography
Wake after Sleep Onset: the total duration between sleep onset and sleep offset time while being awake from type II polysomnography

Total amount of time spent awake after going to sleep

Sleep Monitoring/Polysomnography/Sleep Architecture
ahiov50
Polysomnography (PSG) Quality Assessment: Medical Alert - Apnea-Hypopnea Index (AHI) > 50
Polysomnography (PSG) Quality Assessment: Medical Alert - Apnea-Hypopnea Index (AHI) > 50

Medical Alert for Apnea-Hypopnea Index (AHI) over 50.

Sleep Monitoring/Polysomnography/Administrative
headbox_id
PSG Headbox ID
PSG Headbox ID Sleep Monitoring/Polysomnography/Administrative
hrov150
Polysomnography (PSG) Quality Assessment: Medical Alert - heart rate > 150 for >= 2 minutes
Polysomnography (PSG) Quality Assessment: Medical Alert - heart rate > 150 for >= 2 minutes

Medical Alert for heart rate over 150.

Sleep Monitoring/Polysomnography/Administrative
hrund30
Polysomnography (PSG) Quality Assessment: Medical Alert - heart rate < 30 for >=2 minutes
Polysomnography (PSG) Quality Assessment: Medical Alert - heart rate < 30 for >=2 minutes

Medical Alert for heart rate under 30.

Sleep Monitoring/Polysomnography/Administrative
monitor_id
PSG Monitor ID
PSG Monitor ID Sleep Monitoring/Polysomnography/Administrative
oximet51
PSG Signal Verification (SHHS1): Value of Oximeter (SaO2%)
PSG Signal Verification (SHHS1): Value of Oximeter (SaO2%) Sleep Monitoring/Polysomnography/Administrative
oxyund70
Polysomnography (PSG) Quality Assessment: Medical Alert - oxygen saturation (SaO2) < 70 for >10% total sleep time
Polysomnography (PSG) Quality Assessment: Medical Alert - oxygen saturation (SaO2) < 70 for >10% total sleep time

Medical Alert for oxygen saturation (SaO2) under 70.

Sleep Monitoring/Polysomnography/Administrative
psg_month
Month of PSG recording start date
Month of PSG recording start date Sleep Monitoring/Polysomnography/Administrative
rdisn
Polysomnogram (PSG) Scoring Notes (Sleep Heart Health Study Visit One (SHHS1)): Respiratory Disturbance Index (RDI) as assessed by scorer - total number of apnea and hypopneas associated with a >=3% desat per hour of sleep.
Polysomnogram (PSG) Scoring Notes (Sleep Heart Health Study Visit One (SHHS1)): Respiratory Disturbance Index (RDI) as assessed by scorer - total number of apnea and hypopneas associated with a >=3% desat per hour of sleep.

The Quality Assessment forms were completed by the scorer during preliminary review of the study, finalized after final scoring

Sleep Monitoring/Polysomnography/Administrative
scorer_id
PSG Scorer ID
PSG Scorer ID Sleep Monitoring/Polysomnography/Administrative
stdatep
Polysomnogram (PSG) Start Date (Sleep Heart Health Study Visit Two (SHHS2))
Polysomnogram (PSG) Start Date (Sleep Heart Health Study Visit Two (SHHS2)) Sleep Monitoring/Polysomnography/Administrative
stdydtqa
Polysomnogram (PSG) Quality Assessment (Sleep Heart Health Study Visit One (SHHS1)): Date of Study
Polysomnogram (PSG) Quality Assessment (Sleep Heart Health Study Visit One (SHHS1)): Date of Study Sleep Monitoring/Polysomnography/Administrative
cai4p
Central Apnea Index: (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Central Apnea Index: (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cai4pa
Central Apnea Index: (Central apneas with >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Central Apnea Index: (Central apneas with >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnba
Central Apnea Index (NREM, Supine): (Central apneas with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in supine position from type II polysomnography
Central Apnea Index (NREM, Supine): (Central apneas with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnba2
Central Apnea Index (NREM, Supine): (Central apneas with >=2% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography
Central Apnea Index (NREM, Supine): (Central apneas with >=2% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnba3
Central Apnea Index (NREM, Supine): (Central apneas with >=3% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography
Central Apnea Index (NREM, Supine): (Central apneas with >=3% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnba4
Central Apnea Index (NREM, Supine): (Central apneas with >=4% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography
Central Apnea Index (NREM, Supine): (Central apneas with >=4% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnba5
Central Apnea Index (NREM, Supine): (Central apneas with >=5% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography
Central Apnea Index (NREM, Supine): (Central apneas with >=5% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnbp
Central Apnea Index (NREM, Supine): (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography
Central Apnea Index (NREM, Supine): (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnbp2
Central Apnea Index (NREM, Supine): (Central apneas with >=2% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography
Central Apnea Index (NREM, Supine): (Central apneas with >=2% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnbp3
Central Apnea Index (NREM, Supine): (Central apneas with >=3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography
Central Apnea Index (NREM, Supine): (Central apneas with >=3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnbp4
Central Apnea Index (NREM, Supine): (Central apneas with >=4% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography
Central Apnea Index (NREM, Supine): (Central apneas with >=4% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnbp5
Central Apnea Index (NREM, Supine): (Central apneas with >=5% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography
Central Apnea Index (NREM, Supine): (Central apneas with >=5% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnoa
Central Apnea Index (NREM, Non-Supine): (Central apneas with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in non-supine position from type II polysomnography
Central Apnea Index (NREM, Non-Supine): (Central apneas with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnoa2
Central Apnea Index (NREM, Non-Supine): (Central apneas with >= 2% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type II polysomnography
Central Apnea Index (NREM, Non-Supine): (Central apneas with >= 2% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnoa3
Central Apnea Index (NREM, Non-Supine): (Central apneas with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type II polysomnography
Central Apnea Index (NREM, Non-Supine): (Central apneas with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnoa4
Central Apnea Index (NREM, Non-Supine): (Central apneas with >= 4% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type II polysomnography
Central Apnea Index (NREM, Non-Supine): (Central apneas with >= 4% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnoa5
Central Apnea Index (NREM, Non-Supine): (Central apneas with >= 5% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type II polysomnography
Central Apnea Index (NREM, Non-Supine): (Central apneas with >= 5% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnop
Central Apnea Index (NREM, Non-Supine): (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in non-supine position from type II polysomnography
Central Apnea Index (NREM, Non-Supine): (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnop2
Central Apnea Index (NREM): (Central apneas with >= 2% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Central Apnea Index (NREM): (Central apneas with >= 2% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnop3
Central Apnea Index (NREM): (Central apneas with >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Central Apnea Index (NREM): (Central apneas with >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnop4
Central Apnea Index (NREM): (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Central Apnea Index (NREM): (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnop5
Central Apnea Index (NREM): (Central apneas with >= 5% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Central Apnea Index (NREM): (Central apneas with >= 5% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrba
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 II polysomnography
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 II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrba2
Central Apnea Index (REM, Supine): (Central apneas with >= 2% oxygen desaturation or with arousal) / hour of REM sleep in supine position from type II polysomnography
Central Apnea Index (REM, Supine): (Central apneas with >= 2% oxygen desaturation or with arousal) / hour of REM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrba3
Central Apnea Index (REM, Supine): (Central apneas with >= 3% oxygen desaturation or with arousal) / hour of REM sleep in supine position from type II polysomnography
Central Apnea Index (REM, Supine): (Central apneas with >= 3% oxygen desaturation or with arousal) / hour of REM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrba4
Central Apnea Index (REM, Supine): (Central apneas with >= 4% oxygen desaturation or with arousal) / hour of REM sleep in supine position from type II polysomnography
Central Apnea Index (REM, Supine): (Central apneas with >= 4% oxygen desaturation or with arousal) / hour of REM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrba5
Central Apnea Index (REM, Supine): (Central apneas with >= 5% oxygen desaturation with arousal) / hour of REM sleep in supine position from type II polysomnography
Central Apnea Index (REM, Supine): (Central apneas with >= 5% oxygen desaturation with arousal) / hour of REM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrbp
Central Apnea Index (REM, Supine): (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in supine position from type II polysomnography
Central Apnea Index (REM, Supine): (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrbp2
Central Apnea Index (REM, Supine): (Central apneas with >= 2% oxygen desaturation and with or without arousal) / hour of REM sleep in supine position from type II polysomnography
Central Apnea Index (REM, Supine): (Central apneas with >= 2% oxygen desaturation and with or without arousal) / hour of REM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrbp3
Central Apnea Index (REM, Supine): (Central apneas with >= 3% oxygen desaturation and with or without arousal) / hour of REM sleep in supine position from type II polysomnography
Central Apnea Index (REM, Supine): (Central apneas with >= 3% oxygen desaturation and with or without arousal) / hour of REM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrbp4
Central Apnea Index (REM, Supine): (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of REM sleep in supine position from type II polysomnography
Central Apnea Index (REM, Supine): (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of REM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrbp5
Central Apnea Index (REM, Supine): (Central apneas with >= 5% oxygen desaturation and with or without arousal) / hour of REM sleep in supine position from type II polysomnography
Central Apnea Index (REM, Supine): (Central apneas with >= 5% oxygen desaturation and with or without arousal) / hour of REM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardroa
Central Apnea Index (REM, Non-Supine): (Central apneas with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in non-supine position from type II polysomnography
Central Apnea Index (REM, Non-Supine): (Central apneas with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardroa2
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 2% oxygen desaturation or with arousal) / hour of REM sleep in non-supine position from type II polysomnography
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 2% oxygen desaturation or with arousal) / hour of REM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardroa3
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 3% oxygen desaturation or with arousal) / hour of REM sleep in non-supine position from type II polysomnography
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 3% oxygen desaturation or with arousal) / hour of REM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardroa4
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 4% oxygen desaturation or with arousal) / hour of REM sleep in non-supine position from type II polysomnography
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 4% oxygen desaturation or with arousal) / hour of REM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardroa5
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 5% oxygen desaturation or with arousal) / hour of REM sleep in non-supine position from type II polysomnography
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 5% oxygen desaturation or with arousal) / hour of REM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrop
Central Apnea Index (REM, Non-Supine): (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in non-supine position from type II polysomnography
Central Apnea Index (REM, Non-Supine): (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrop2
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 2% oxygen desaturation and with or without arousal) / hour of REM sleep in non-supine position from type II polysomnography
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 2% oxygen desaturation and with or without arousal) / hour of REM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrop3
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 3% oxygen desaturation and with or without arousal) / hour of REM sleep in non-supine position from type II polysomnography
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 3% oxygen desaturation and with or without arousal) / hour of REM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrop4
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of REM sleep in non-supine position from type II polysomnography
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of REM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardrop5
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 5% oxygen desaturation and with or without arousal) / hour of REM sleep in non-supine position from type II polysomnography
Central Apnea Index (REM, Non-Supine): (Central apneas with >= 5% oxygen desaturation and with or without arousal) / hour of REM sleep in non-supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cent_obs_ratio
Ratio of the number of central apneas with no oxygen desaturation threshold used and with or without arousal to the number of obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type II polysomnography
Ratio of the number of central apneas with no oxygen desaturation threshold used and with or without arousal to the number of obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type II polysomnography Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cent_obs_ratioa
Ratio of the number of central apneas with no oxygen desaturation threshold used or with arousal to the number of obstructive apneas with no oxygen desaturation threshold used or with arousal from type II polysomnography
Ratio of the number of central apneas with no oxygen desaturation threshold used or with arousal to the number of obstructive apneas with no oxygen desaturation threshold used or with arousal from type II polysomnography Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oai4p
Obstructive Apnea Index: (Obstructive apneas with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Obstructive Apnea Index: (Obstructive apneas with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oai4pa
Obstructive Apnea Index: (Obstructive apneas with >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Obstructive Apnea Index: (Obstructive apneas with >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oardnba
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in supine position from type II polysomnography
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oardnba2
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 2% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 2% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oardnba3
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oardnba4
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 4% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 4% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oardnba5
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 5% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 5% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oardnbp
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oardnbp2
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 2% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 2% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oardnbp3
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oardnbp4
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 4% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography
Obstructive Apnea Index (NREM, Supine): (Obstructive apneas with >= 4% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices