tst - Search - Sleep Data - National Sleep Research Resource

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.

LOG % Total Sleep Time (TST) with carbon dioxide (CO2) > 50 millimeters (mm) mercury (Hg)

lgpctco2g50 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Original source: MS 003

LOG % Total Sleep Time (TST) with carbon dioxide (CO2) > 50 millimeters (mm) mercury (Hg) (0 replaced with 0.0001)

lgpctco2g50_0 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Original source: MS 003

Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg) (normalized for capnograph type)

nova_est_pctco2g45 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Percentage Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg) (normalized for capnograph type)

nova_est_pctco2g50 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg)

pctco2g45 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Percentage of Total Sleep Time (TST) end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg)

pctco2g50 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 45 millimeters (mm) mercury (Hg)

rpctco2g45 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Percentage of Total Sleep Time (TST) where end-tidal carbon dioxide (ETCO2) > 50 millimeters (mm) mercury (Hg)

rpctco2g50 under Sleep Monitoring/Polysomnography/Capnography in CHAT variables

Percentage duration of sleep with oxygen saturation <= 70% from type I polysomnography

pctsa70 under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

[(total time oxygen saturation (SaO2) is <= 70%) / (Total Sleep Time (TST))] * 100

Percentage duration of sleep with oxygen saturation < 70% from type I polysomnography

pctsa70h under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

[(total time oxygen saturation (SaO2) is < 70%) / (Total Sleep Time (TST))] * 100

Percentage duration of sleep with oxygen saturation <= 75% from type I polysomnography

pctsa75 under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

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

Percentage duration of sleep with oxygen saturation < 75% from type I polysomnography

pctsa75h under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

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

Percentage duration of sleep with oxygen saturation <= 80% from type I polysomnography

pctsa80 under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

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

Percentage duration of sleep with oxygen saturation < 80% from type I polysomnography

pctsa80h under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

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

Percentage duration of sleep with oxygen saturation <= 85% from type I polysomnography

pctsa85 under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

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

Percentage duration of sleep with oxygen saturation < 85% from type I polysomnography

pctsa85h under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

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

Percentage duration of sleep with oxygen saturation <= 90% from type I polysomnography

pctsa90 under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

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

Percentage duration of sleep with oxygen saturation <= 92% from type I polysomnography

pctsa92 under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

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

Percentage duration of sleep with oxygen saturation <= 95% from type I polysomnography

pctsa95 under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

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

Percentage duration of sleep with oxygen saturation < 95% from type I polysomnography

pctsa95h under Sleep Monitoring/Polysomnography/Oxygen Saturation in CHAT variables

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

Percentage duration of sleep in non-supine position from type I polysomnography

nsupinep under Sleep Monitoring/Polysomnography/Sleep Architecture in CHAT variables

[100*(number of minutes of sleep in non-supine body position) / (Total Sleep Time (TST))]