apneas - Search - Sleep Data - National Sleep Research Resource

Total Number of Apneas and Hypopneas (Supine): Apneas with >= 4% oxygen desaturation + hypopneas with > 50% flow reduction and >= 4% oxygen desaturation during artifact-free estimated sleep in supine position from type IV home sleep apnea test

slpa68 under Sleep Monitoring/Polysomnography/Respiratory Event Counts in HCHS variables

Apnea and hypopnea events were not distinguished as separate event types during scoring. Both were classified as a respiratory event that required a 50% reduction in Nasal Flow signal for at least 10 seconds.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) Any continuous periods of >=20 min with loss of respiratory channel was marked as wake and not included in the estimates.

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

cent_obs_ratio under Sleep Monitoring/Polysomnography/Respiratory Event Counts in SOF variables

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

cent_obs_ratioa under Sleep Monitoring/Polysomnography/Respiratory Event Counts in SOF variables

Total Duration of Apneas and Hypopneas (NREM): Apneas with no oxygen desaturation threshold used and hypopneas with > 30% flow reduction and no oxygen desaturation threshold used during NREM sleep from type II polysomnography

ahntdur under Sleep Monitoring/Polysomnography/Respiratory Event Lengths in SOF variables

Total Duration of Apneas and Hypopneas (NREM, Supine): Apneas with no oxygen desaturation threshold used and hypopneas with > 30% flow reduction and no oxygen desaturation threshold used during NREM sleep in supine position from type II polysomnography

ahntdurbp under Sleep Monitoring/Polysomnography/Respiratory Event Lengths in SOF variables

Total Duration of Apneas and Hypopneas (NREM, Non-Supine): Apneas with no oxygen desaturation threshold used and hypopneas with > 30% flow reduction and no oxygen desaturation threshold used during NREM sleep in non-supine position from type II polysomnography

ahntdurop under Sleep Monitoring/Polysomnography/Respiratory Event Lengths in SOF variables

Total Duration of Apneas and Hypopneas (REM, Supine): Apneas with no oxygen desaturation threshold used and hypopneas with > 30% flow reduction and no oxygen desaturation threshold used during REM sleep in supine position from type II polysomnography

ahrtdurbp under Sleep Monitoring/Polysomnography/Respiratory Event Lengths in SOF variables

Total Duration of Apneas and Hypopneas (REM, Non-Supine): Apneas with no oxygen desaturation threshold used and hypopneas with > 30% flow reduction and no oxygen desaturation threshold used during NREM sleep in non-supine position from type II polysomnography

ahtdurop under Sleep Monitoring/Polysomnography/Respiratory Event Lengths in SOF variables

Total Duration of Apneas and Hypopneas (REM): Apneas with no oxygen desaturation threshold used and hypopneas with > 30% flow reduction and no oxygen desaturation threshold used during REM sleep from type II polysomnography

hrtdur under Sleep Monitoring/Polysomnography/Respiratory Event Lengths in SOF variables

cent_obs_ratio under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in SHHS variables

cent_obs_ratioa under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in SHHS variables

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

rdi4p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in SHHS variables

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

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 I polysomnography

oahi3 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CCSHS variables

Ratio of the count of all obstructive apneas (all desaturations) plus the count of hypopneas associated with at least a >=3% oxygen desaturation to the total sleep time expressed in hours.

Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography

oai0p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CCSHS variables

Obstructive Apnea Index at all desaturations [(Total number of obstructive apneas associated with all desaturations) / (hours of sleep)]

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 I polysomnography

rdi3p under Sleep Monitoring/Polysomnography/Sleep Architecture in CCSHS variables

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

Central Apnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography

cai0p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(Total number of central apneas associated with all desaturations) / (hours of sleep)]. Will be missing if Total Sleep Time (TST) is 0.

Central Apnea Index : (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography

cai4p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(Total number of central apneas associated with >= 4% desaturations) / (hours of sleep)]

Central Apnea Index : (Central apneas with >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography

cai4pa under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(Total number of central apneas with >= 4% desaturation or arousal) / (hours of sleep)]

Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography

omahi3 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Calculated - Summary metric of sleep disordered breathing events. The definition of hypopnea events is consistent with the American Academy of Sleep Medicine (AASM) 2007 Manual (pediatric). [Iber C et al. The AASM manual for the scoring of sleep and associated events: rules, terminology and technical specifications. Vol. 1. Westchester, IL: American Academy of Sleep Medicine, 2007] Search for all AHI variables consistent with the clinical guidelines within this dataset

Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (Supine): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep in supine position from type I polysomnography

omahi3b under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Calculated - Summary metric of sleep disordered breathing events. Will be missing if Total Sleep Time (TST) is 0.

Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (NREM): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of NREM sleep from type I polysomnography

omahi3nr under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Calculated - Summary metric of sleep disordered breathing events. Will be missing if Total Sleep Time (TST) is 0.

Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (Non-Supine): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep in non-supine position from type I polysomnography

omahi3o under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Calculated - Summary metric of sleep disordered breathing events. Will be missing if Total Sleep Time (TST) is 0.

Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index (REM): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of REM sleep from type I polysomnography

omahi3r under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Calculated - Summary metric of sleep disordered breathing events. Will be missing if Total Sleep Time (TST) is 0.

Childhood Adenotonsillectomy Trial (CHAT) Obstructive and Mixed Apnea Index (AHI): (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography

omai0p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Calculated - Summary metric of sleep disordered breathing events.

Childhood Adenotonsillectomy Trial (CHAT) Obstructive and Mixed Apnea Index (AHI): (Obstructive apneas with >= 4% oxygen desaturation threshold used and with or without arousal+ mixed apneas with >= 4% oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography

omai4p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Calculated - Summary metric of sleep disordered breathing events.