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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 I polysomnography

ahi_o0h4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CFS 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 (recommended) 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

Hypopnea Index (NREM, Supine) : (Hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography

rdinbp4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CFS 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

Hypopnea Index (NREM, Non-Supine) : (Hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography

rdinop4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CFS variables

Hypopnea Index (REM, Supine) : (Hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography

rdirbp4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CFS 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

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

rdirem4p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CFS 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 (recommended) 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

Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography

rdirop4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CFS 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 (recommended) 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

Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction with >= 4% oxygen desaturation) / hour of sleep

nsrr_ahi_hp4u_aasm15 under Harmonized/Polysomnography/Apnea-Hypopnea Indices in MROS variables

Harmonized by the NSRR team.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.]. Refer to the source for detailed definition for respiratory events: :poahi4: at Visit 1

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 II polysomnography

poahi4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MROS 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 II polysomnography

pocahi4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MROS 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

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 II polysomnography

pooahi4 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in MROS 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

Apnea-Hypopnea Index: (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction with >= 4% oxygen desaturation) / hour of sleep

nsrr_ahi_hp4u_aasm15 under Harmonized/Polysomnography/Apnea-Hypopnea Indices in HOMEPAP variables

Apnea-Hypopnea Index (AHI): (All apneas with no oxygen desaturation threshold used + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation ) / hour of estimated sleep from type III home sleep test

aphypi under Sleep Monitoring/Home Sleep Test in HOMEPAP variables

Calculated - Summary metric of sleep disordered breathing events. Estimated sleep duration, providing an approximation of total sleep duration (i.e. total sleep time) inferred from analysis of non-EEG channels Zhao et al., 2017 (PMID:27707441)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

Apnea-Hypopnea Index (AHI): (All apneas with no oxygen desaturation threshold used + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation ) / hour of sleep from type I polysomnography or type III home sleep test

ahi under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in HOMEPAP variables

Composite AHI based on the diagnostic sleep study and home sleep study.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

Apnea-Hypopnea Index (AHI) (split-night, diagnostic): (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_d under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in HOMEPAP 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

Apnea-Hypopnea Index (AHI) (full-night): (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_full under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in HOMEPAP 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

Apnea-Hypopnea Index (AHI) (split-night, treatment): (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_t under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in HOMEPAP 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

Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction with >= 4% oxygen desaturation) / hour of estimated sleep

nsrr_ahi_hp4u_aasm15 under Harmonized/Polysomnography/Apnea-Hypopnea Indices in BESTAIR variables

Harmonized by the NSRR team.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.]. Data collected with no EEGs. Refer to the source for detailed definition for respiratory events: :ahi_primary:

Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation) / hour of estimated sleep from type III home sleep apnea test

ahi_primary under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in BESTAIR 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.].

Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction with >= 4% oxygen desaturation) / hour of estimated sleep

nsrr_ahi_hp4u_aasm15 under Harmonized/Polysomnography/Apnea-Hypopnea Indices in NUMOM2B variables

Harmonized by the NSRR team.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.]. Data collected with no EEGs. Refer to the source for detailed definition for respiratory events: :ahi_ap0nhp3x4n_f1t3:

ahi_ap0nhp3x4n_f1t3 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in NUMOM2B 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

Apnea-Hypopnea Index: (All apneas with >= 4% oxygen desaturation + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation) / hour of estimated sleep from type III home sleep apnea test

ahi_ap4nhp3x4n_f1t3 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in NUMOM2B 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

Hypopnea Index: (Hypopneas with > 50% flow reduction and no oxygen desaturation threshold used) / hour of estimated sleep from type III home sleep apnea test

hi_hp5x0n_f1t3 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in NUMOM2B variables

Calculated - Summary metric of sleep disordered breathing events. Hypopneas are defined based on 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

Hypopnea Index (Supine): (Hypopneas with > 30% flow reduction and >= 4% oxygen desaturation) / hour of estimated sleep from type III home sleep apnea test

hi_pb_hp3x4n_f1t3 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in NUMOM2B 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

Hypopnea Index (Supine): (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or witout arousal) / hour of estimated sleep from type III home sleep apnea test

hi_pb_hp5x0n_f1t3 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in NUMOM2B variables

Hypopnea Index (Non-Supine): (Hypopneas with > 30% flow reduction and >= 4% oxygen desaturation) / hour of estimated sleep from type III home sleep apnea test

hi_po_hp3x4n_f1t3 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in NUMOM2B 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