hrop4 - Search - Sleep Data - National Sleep Research Resource

Apnea-Hypopnea Index: (All 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

ahi_a0h4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CCSHS 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

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

ahi_c0h4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CCSHS variables

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

ahi_o0h4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CCSHS variables

Apnea-Hypopnea Index : (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography

ahi_a0h4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Calculated - Summary metric of sleep disordered breathing events.

Central Apnea-Hypopnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography

ahi_c0h4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT 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 > 50% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography

ahi_o0h4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Calculated - Summary metric of sleep disordered breathing events.

Apnea-Hypopnea Index: (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) / hour of sleep from type I polysomnography

rdim4p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas associated with >= 3% desaturation) / (hours of sleep)]

Apnea-Hypopnea Index (Non-Supine): (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) / hour of sleep in non-supine from type I polysomnography

rdim4pns under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas in non-supine body position associated with >= 3% desaturation) / (hours of sleep)]. will be missing if no time non-supine or low position sensor quality.

Apnea-Hypopnea Index (REM): (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 REM sleep from type I polysomnography

rdimrem4p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas in rapid eye movement sleep (REM) associated with >= 4% desaturation) / (hours of rapid eye movement sleep (REM))]

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

ahi_a0h4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

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

ahi_c0h4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MESA variables

Calculated - Summary metric of sleep disordered breathing events.