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Apnea-Hypopnea Index (NREM): (Apneas with >= 5% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 5% oxygen desaturation used and with or without arousal) / hours of NREM sleep from type I polysomnography
rdimnr5p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables
[(total number of apneas and hypopneas in non-rapid eye movement sleep (NREM) associated with >= 5% desaturation) / (hours of non-rapid eye movement sleep (NREM))]
Apnea-Hypopnea Index (REM): (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with no oxygen desaturation used and with or without arousal) / hours of REM sleep from type I polysomnography
rdimrem0p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables
[(total number of apneas and hypopneas in rapid eye movement sleep (REM)) / (hours of rapid eye movement sleep (REM))]
Apnea-Hypopnea Index (REM): (Apneas with >= 2% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 2% oxygen desaturation used and with or without arousal) / hours of REM sleep from type I polysomnography
rdimrem2p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables
[(total number of apneas and hypopneas in rapid eye movement sleep (REM) associated with >= 2% desaturation) / (hours of rapid eye movement sleep (REM))]
Apnea-Hypopnea Index (REM): (Apneas with >= 3% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used and with or without arousal) / hours of REM sleep from type I polysomnography
rdimrem3p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables
[(total number of apneas and hypopneas in rapid eye movement sleep (REM) associated with >= 3% desaturation) / (hours of rapid eye movement sleep (REM))]
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 (REM): (Apneas with >= 5% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 5% oxygen desaturation used and with or without arousal) / hours of REM sleep from type I polysomnography
rdimrem5p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables
[(total number of apneas and hypopneas in rapid eye movement sleep (REM) associated with >= 5% desaturation) / (hours of rapid eye movement sleep (REM))]
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 I polysomnography
cent_obs_ratio under Sleep Monitoring/Polysomnography/Respiratory Event Counts in CHAT 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 I polysomnography
cent_obs_ratioa under Sleep Monitoring/Polysomnography/Respiratory Event Counts in CHAT variables
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 MESA variables
Calculated
Ratio of the number of central apneas with no oxygen desaturation threshold used or without 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 MESA variables
Calculated
polysomnography-introduction.md
Nulliparous Pregnancy Outcomes Study Monitoring Mothers-to-be
... waveform, needed for detecting apneas and hypopneas and airflow ... distinguishing central from obstructive apneas and as a back-up ...
3-02-condensed-data-dictionary.md
Childhood Adenotonsillectomy Trial
... the sleep period. Since apneas require a good thermistry ... is unreliable. Since central apneas require visualization of effort ...
README.md
Apnea Positive Pressure Long-term Efficacy Study
... are provided below: * Apneas - defined by a ... cigarettes nsrr_ahi_chicago1999Apnea-Hypopnea Index: (All apneas + hypopneas with >50% ...
Matt Butler - Researcher Showcase
Posted by remomueller on June 11, 2015 in Showcase
... in the duration of apneas and hypopneas. This largely ... whether long or short apneas are bad for health. ...
Supporting Education with Public Datasets and Tutorials
Posted by remomueller on February 6, 2017 in News
... Tutorial 5 - Count Apneas in EDF Annotations ...
Heart Rate Variability as a Potential Biomarker of Pediatric Obstructive Sleep Apnea Resolution
Posted by michaelprerau on August 1, 2022 in Guest Blogger
... and then adding central apneas to the resolution criteria). ... first, and adding central apneas later) and changes in ...
Way to check sleep stage
Reply by mrueschman on April 28, 2015 on Forum
... to distinguish between obstructive apneas, central apneas, and other types of ...
CHAT Dataset v0.2.0 released!
Reply by mrueschman on September 12, 2016 on Forum
... happened is that Mixed Apneas were scored in Compumedics ... guessing all the Mixed Apneas have been output as ...
Definition of OAHI in the SHHS variable
Reply by windang on April 5, 2017 on Forum
... 4% desaturation index and apneas at any level of ... am confused, should the apneas be at 4% as ...
Definition of OAHI in the SHHS variable
Reply by mrueschman on April 10, 2017 on Forum
"oahi" only contains obstructive apneas, while "ahi_a0h4" contains both obstructive and central apneas. These two variables are ...
AHI to resemble AASM 2012 rules
Reply by margotdeviaene on April 21, 2017 on Forum
... all (central and obstructive) apneas, together with hypopneas that ... this index only counts apneas with an arousal. Furthermore, ...
AHI definition in SHHS
Reply by jbehar on August 13, 2019 on Forum
... guidelines used in defining apneas and hypopneas in the ... rules used to score apneas and hypopneas: https://sleepdata.org/datasets/shhs/pages/mop/6-627-mop-scoring-respiratory-events.md In ...
AHI definition in SHHS
Reply by mrueschman on August 13, 2019 on Forum
... from the counts of apneas and hypopneas from the ... we normally use "all apneas" and "hypopneas with >=X% ...
AHI definition in SHHS
Reply by mrueschman on August 14, 2019 on Forum
... this variable required that apneas also have an associated ... its approach for including apneas had become a bit ...
Respiratory events screening
Reply by mrueschman on October 14, 2022 on Forum
... total number of central apneas. There is another set ... of variables for obstructive apneas, and another for hypopneas ...
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