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.

Childhood Adenotonsillectomy Trial

Name Label Folder
oxitype
Oximeter type
Oximeter type

1 = Masimo, 2 = Nonin, 3 = Nonin Biologic

Sleep Monitoring/Polysomnography/Administrative
unittype
Polysomnography (PSG) unit type
Polysomnography (PSG) unit type Sleep Monitoring/Polysomnography/Administrative
ahi_a0h3
Apnea-Hypopnea Index : (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index : (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography 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 > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index : (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography

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

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 > 50% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
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

Calculated - Summary metric of sleep disordered breathing events.

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 > 50% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index : (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type I 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 > 50% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
Central Apnea-Hypopnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I 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 > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
Central Apnea-Hypopnea Index : (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography

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

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 > 50% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
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

Calculated - Summary metric of sleep disordered breathing events.

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 > 50% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
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 or with arousal) / hour of sleep from type I 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 > 50% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
Obstructive Apnea-Hypopnea Index : (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I 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 > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
Obstructive Apnea-Hypopnea Index : (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography

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

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 > 50% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
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

Calculated - Summary metric of sleep disordered breathing events.

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

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cardnba
Total number of central apnea in NREM sleep in supine position: Central apneas with no oxygen desaturation threshold used only with arousal from type I polysomnography
Total number of central apnea in NREM sleep in supine position: Central apneas with no oxygen desaturation threshold used only with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
hmanrop
Mixed Apnea Index (NREM, Non-Supine): (Mixed apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography
Mixed Apnea Index (NREM, Non-Supine): (Mixed apneas with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
omahi3
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
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

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
omahi3b
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
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

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
omahi3_change
Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) change between Baseline and End
Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) change between Baseline and End Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
omahi3nr
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
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

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
omahi3o
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
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

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
omahi3r
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
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

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
omai0p
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
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

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdim3p
Apnea-Hypopnea Index: (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) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index: (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) / hour of sleep from type I polysomnography

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdim3pa
Apnea-Hypopnea Index: (Apneas with >= 3% oxygen desaturation threshold used or with arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used or with arousal) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index: (Apneas with >= 3% oxygen desaturation threshold used or with arousal+ hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation used or with arousal) / hour of sleep from type I polysomnography

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdim3pns
Apnea-Hypopnea Index (Non-Supine): (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) / hour of sleep in non-supine from type I polysomnography
Apnea-Hypopnea Index (Non-Supine): (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) / hour of sleep in non-supine from type I polysomnography

[(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.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdim3ps
Apnea-Hypopnea Index (Supine): (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) / hour of sleep in supine from type I polysomnography
Apnea-Hypopnea Index (Supine): (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) / hour of sleep in supine from type I polysomnography

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdim4p
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
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

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdim4pa
Apnea-Hypopnea Index: (Apneas with >= 4% oxygen desaturation threshold used or with arousal+ hypopneas with > 50% flow reduction and with >= 4% oxygen desaturation used or with arousal) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index: (Apneas with >= 4% oxygen desaturation threshold used or with arousal+ hypopneas with > 50% flow reduction and with >= 4% oxygen desaturation used or with arousal) / hour of sleep from type I polysomnography

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

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdinba
Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in supine position from type I polysomnography
Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used only with arousal) / hour of NREM sleep in supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdinba2
Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 2% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type I polysomnography
Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 2% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdinba3
Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type I polysomnography
Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdinbp
Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography
Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdinbp3
Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography
Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdinoa3
Hypopnea Index (NREM, Non-Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type I polysomnography
Hypopnea Index (NREM, Non-Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of NREM sleep in non-supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdinop
Hypopnea Index (NREM, Non-Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography
Hypopnea Index (NREM, Non-Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdinop3
Hypopnea Index (NREM, Non-Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography
Hypopnea Index (NREM, Non-Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdirba3
Hypopnea Index (REM, Supine): (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of REM sleep in supine position from type I polysomnography
Hypopnea Index (REM, Supine): (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of REM sleep in supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdirbp
Hypopnea Index (REM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in supine position from type I polysomnography
Hypopnea Index (REM, Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdirbp3
Hypopnea Index (REM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography
Hypopnea Index (REM, Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdiroa
Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used only with arousal) / hour of REM sleep in non-supine position from type I polysomnography
Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used only with arousal) / hour of REM sleep in non-supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdiroa3
Hypopnea Index (REM, Non-Supine): (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of REM sleep in non-supine position from type I polysomnography
Hypopnea Index (REM, Non-Supine): (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of REM sleep in non-supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdirop
Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in non-supine position from type I polysomnography
Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 50% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of REM sleep in non-supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdirop3
Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography
Hypopnea Index (REM, Non-Supine) : (Hypopneas with > 50% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of NREM sleep in non-supine position from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ai_all
Arousal Index: Number of arousals per hour of sleep from type I polysomnography
Arousal Index: Number of arousals per hour of sleep from type I polysomnography

All arousals were scored but only arousals that started in epoch of sleep are included in the arousal index calculations.

[(Total number of arousals) / (hours of sleep)]

Sleep Monitoring/Polysomnography/Arousals
ai_nrem
Arousal Index (NREM): number of arousals per hour of NREM sleep from type I polysomnography
Arousal Index (NREM): number of arousals per hour of NREM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Arousals
ai_rem
Arousal Index (REM): number of arousals per hour of REM sleep from type I polysomnography
Arousal Index (REM): number of arousals per hour of REM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Arousals
capnotype
Capnograph type
Capnograph type Sleep Monitoring/Polysomnography/Capnography
co2dur
Hours of usable carbon dioxide (CO2)
Hours of usable carbon dioxide (CO2)

Hours of usable carbon dioxide (CO2) signal - requires use of calibrated channel type with upper and lower limits for valid signal

Sleep Monitoring/Polysomnography/Capnography
nova_est_co2avgnr
Average end-tidal carbon dioxide (ETCO2) in non-rapid eye movement sleep (NREM) (normalized for capnograph type)
Average end-tidal carbon dioxide (ETCO2) in non-rapid eye movement sleep (NREM) (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_co2avgr
Average end-tidal carbon dioxide (ETCO2) in rapid eye movement sleep (REM) (normalized for capnograph type)
Average end-tidal carbon dioxide (ETCO2) in rapid eye movement sleep (REM) (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_co2blslp
Baseline end-tidal carbon dioxide (ETCO2) asleep (normalized for capnograph type)
Baseline end-tidal carbon dioxide (ETCO2) asleep (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_co2blwake
Baseline end-tidal carbon dioxide (ETCO2) awake (normalized for capnograph type)
Baseline end-tidal carbon dioxide (ETCO2) awake (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_co2peak
Peak end-tidal carbon dioxide (ETCO2) asleep (normalized for capnograph type)
Peak end-tidal carbon dioxide (ETCO2) asleep (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_pctco2g45
Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg) (normalized for capnograph type)
Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg) (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
nova_est_pctco2g50
Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg) (normalized for capnograph type)
Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg) (normalized for capnograph type) Sleep Monitoring/Polysomnography/Capnography
rco2avgnr
Average end-tidal carbon dioxide (ETCO2) in non-rapid eye movement sleep (NREM)
Average end-tidal carbon dioxide (ETCO2) in non-rapid eye movement sleep (NREM) Sleep Monitoring/Polysomnography/Capnography
rco2avgr
Average end-tidal carbon dioxide (ETCO2) in rapid eye movement sleep (REM)
Average end-tidal carbon dioxide (ETCO2) in rapid eye movement sleep (REM) Sleep Monitoring/Polysomnography/Capnography
rco2blslp
Baseline end-tidal carbon dioxide (ETCO2) asleep
Baseline end-tidal carbon dioxide (ETCO2) asleep Sleep Monitoring/Polysomnography/Capnography
rco2blwake
Baseline end-tidal carbon dioxide (ETCO2) awake
Baseline end-tidal carbon dioxide (ETCO2) awake Sleep Monitoring/Polysomnography/Capnography
rco2peak
Peak end-tidal carbon dioxide (ETCO2) asleep
Peak end-tidal carbon dioxide (ETCO2) asleep Sleep Monitoring/Polysomnography/Capnography
rpctco2g45
Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg)
Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg) Sleep Monitoring/Polysomnography/Capnography
rpctco2g50
Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg)
Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg) Sleep Monitoring/Polysomnography/Capnography
bpmavg
Average level of heart rate from type I polysomnography
Average level of heart rate from type I polysomnography

entire recording

Sleep Monitoring/Polysomnography/Heart Rate
bpmmax
Maximum level of heart rate from type I polysomnography
Maximum level of heart rate from type I polysomnography

entire recording

Sleep Monitoring/Polysomnography/Heart Rate
bpmmin
Minimum level of heart rate from type I polysomnography
Minimum level of heart rate from type I polysomnography

entire recording

Sleep Monitoring/Polysomnography/Heart Rate
avgrplm
Number of periodic limb movements per hour of REM sleep from type I polysomnography
Number of periodic limb movements per hour of REM sleep from type I polysomnography

Number of PLM per hour of REM sleep

Sleep Monitoring/Polysomnography/Limb Movements
lmar
Total number of limb movements with arousal and respiratory event from type I polysomnography
Total number of limb movements with arousal and respiratory event from type I polysomnography

Total limb movements with arousal and respiratory events

Sleep Monitoring/Polysomnography/Limb Movements
noplm
Total number of periodic limb movements in sleep from type I polysomnography
Total number of periodic limb movements in sleep from type I polysomnography

Number of PLM during sleep

Sleep Monitoring/Polysomnography/Limb Movements
plmaslp
Total number of periodic limb movements with arousal from type I polysomnography
Total number of periodic limb movements with arousal from type I polysomnography Sleep Monitoring/Polysomnography/Limb Movements
avsao2nh
Average oxygen saturation in NREM sleep from type I polysomnography
Average oxygen saturation in NREM sleep from type I polysomnography

The mean of all oxygen saturation values in epochs scored as stages other than REM (i.e., 1,2,3/4).

Sleep Monitoring/Polysomnography/Oxygen Saturation
avsao2rh
Average oxygen saturation in REM sleep from type I polysomnography
Average oxygen saturation in REM sleep from type I polysomnography

The mean of all oxygen saturation values in epochs scored as stage REM.

Sleep Monitoring/Polysomnography/Oxygen Saturation
mnsao2nh
Minimum oxygen saturation in NREM sleep from type I polysomnography
Minimum oxygen saturation in NREM sleep from type I polysomnography

The minimum of all oxygen saturation values in epochs scored as stages other than REM (i.e., 1,2,3/4).

Sleep Monitoring/Polysomnography/Oxygen Saturation
mnsao2rh
Minimum oxygen saturation in REM sleep from type I polysomnography
Minimum oxygen saturation in REM sleep from type I polysomnography

The minimum of all oxygen saturation values in epochs scored as stage REM.

Sleep Monitoring/Polysomnography/Oxygen Saturation
mxsao2nh
Maximum oxygen saturation in NREM sleep from type I polysomnography
Maximum oxygen saturation in NREM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
mxsao2rh
Maximum oxygen saturation in REM sleep from type I polysomnography
Maximum oxygen saturation in REM sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
ndes2ph
Total number of oxygen desaturation with oxygen desaturation >= 2% from type I polysomnography
Total number of oxygen desaturation with oxygen desaturation >= 2% from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
ndes3ph
Total number of oxygen desaturation with oxygen desaturation >= 3% from type I polysomnography
Total number of oxygen desaturation with oxygen desaturation >= 3% from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
ndes4ph
Total number of oxygen desaturation with oxygen desaturation >= 4% from type I polysomnography
Total number of oxygen desaturation with oxygen desaturation >= 4% from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
ndes5ph
Total number of oxygen desaturation with oxygen desaturation >= 5% from type I polysomnography
Total number of oxygen desaturation with oxygen desaturation >= 5% from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
odi3
Oxygen Desaturation Index: Oxygen desaturation with >= 3% desat per hour of sleep from type I polysomnography
Oxygen Desaturation Index: Oxygen desaturation with >= 3% desat per hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
odi4
Oxygen Desaturation Index: Oxygen desaturation with >= 4% desat per hour of sleep from type I polysomnography
Oxygen Desaturation Index: Oxygen desaturation with >= 4% desat per hour of sleep from type I polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa75
Percentage duration of sleep with oxygen saturation <= 75% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 75% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 75%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa80
Percentage duration of sleep with oxygen saturation <= 80% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 80% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 80%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa80h
Percentage duration of sleep with oxygen saturation < 80% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 80% from type I polysomnography

[(total time oxygen saturation (SaO2) is < 80%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa85
Percentage duration of sleep with oxygen saturation <= 85% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 85% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 85%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa85h
Percentage duration of sleep with oxygen saturation < 85% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 85% from type I polysomnography

[(total time oxygen saturation (SaO2) is < 85%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa90
Percentage duration of sleep with oxygen saturation <= 90% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 90% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 90%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa90h
Percent of the total sleep duration with oxygen saturation below 90% from type I polysomnography
Percent of the total sleep duration with oxygen saturation below 90% from type I polysomnography

Conventionally, total sleep duration would be called total sleep time (TST).

[(total time oxygen saturation (SaO2) is < 90%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa92
Percentage duration of sleep with oxygen saturation <= 92% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 92% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 92%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa95
Percentage duration of sleep with oxygen saturation <= 95% from type I polysomnography
Percentage duration of sleep with oxygen saturation <= 95% from type I polysomnography

[(total time oxygen saturation (SaO2) is <= 95%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
pctsa95h
Percentage duration of sleep with oxygen saturation < 95% from type I polysomnography
Percentage duration of sleep with oxygen saturation < 95% from type I polysomnography

[(total time oxygen saturation (SaO2) is < 95%) / (Total Sleep Time (TST))] * 100

Sleep Monitoring/Polysomnography/Oxygen Saturation
sao2nrem
Average oxygen saturation in NREM sleep from type I polysomnography
Average oxygen saturation in NREM sleep from type I polysomnography

[mean(all oxygen saturation (SaO2) values in non-rapid eye movement sleep (NREM))]. will be missing if study scored as sleep/wake only.

Sleep Monitoring/Polysomnography/Oxygen Saturation
sao2rem
Average oxygen saturation in REM sleep from type I polysomnography
Average oxygen saturation in REM sleep from type I polysomnography

[mean(all oxygen saturation (SaO2) values in rapid eye movement sleep (REM))]. will be missing if study scored as sleep/wake only.

Sleep Monitoring/Polysomnography/Oxygen Saturation
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 I 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 I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
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 I 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 I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
cavgdur
Average duration of central apnea from type I polysomnography
Average duration of central apnea from type I polysomnography

duration (entire recording)

Sleep Monitoring/Polysomnography/Respiratory Event Lengths
havgdur
Average duration of hypopnea from type I polysomnography
Average duration of hypopnea from type I polysomnography

duration (entire recording)

Sleep Monitoring/Polysomnography/Respiratory Event Lengths
longap
Maximum duration of apnea from type I polysomnography
Maximum duration of apnea from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Lengths