apneas - Search - Sleep Data - National Sleep Research Resource

Childhood Adenotonsillectomy Trial (CHAT) Obstructive and Mixed Apnea Index (AHI): (Obstructive apneas with >= 4% oxygen desaturation threshold used or with arousal+ mixed apneas with >= 4% oxygen desaturation threshold used or with arousal) / hour of sleep from type I polysomnography

omai4pa under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Calculated - Summary metric of sleep disordered breathing events.

Apnea-Hypopnea Index : (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) / hour of sleep from type I polysomnography

rdim0p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas) / (hours of sleep)]

Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used only with arousal + hypopneas with > 50% flow reduction and with no oxygen desaturation used only with arousal) / hour of sleep from type I polysomnography

rdim0pa under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas with arousal) / (hours of sleep)]

Apnea-Hypopnea Index (Non-Supine): (Apneas with no oxygen desaturation threshold used only with arousal + hypopneas with > 50% flow reduction and with no oxygen desaturation used only with arousal) / hour of sleep in non-supine position from type I polysomnography

rdim0pns under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Non-supine Respiratory Disturbance Index (RDI) at all desaturations [(total number of apneas and hypopneas in non-supine body position) / (hours of sleep)]

Apnea-Hypopnea Index (Supine): (Apneas with no oxygen desaturation threshold used only with arousal + hypopneas with > 50% flow reduction and with no oxygen desaturation used only with arousal) / hour of sleep in supine position from type I polysomnography

rdim0ps under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Supine Respiratory Disturbance Index (RDI) at all desaturations [(total number of apneas and hypopneas in supine body position) / (hours of sleep)]

Apnea-Hypopnea Index: (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) / hour of sleep from type I polysomnography

rdim2p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas associated with >= 2% desaturation) / (hours of sleep)]

Apnea-Hypopnea Index: (Apneas with >= 2% oxygen desaturation threshold used or with arousal+ hypopneas with > 50% flow reduction and with >= 2% oxygen desaturation used or with arousal) / hour of sleep from type I polysomnography

rdim2pa under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Respiratory Disturbance Index (RDI) at >=2% desaturation or arousal [(total number of apneas and hypopneas with >=2% desaturation or arousal) / (hours of sleep)]

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

rdim2pns under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas in non-supine body position associated with >= 2% desaturation) / (hours of sleep)]

Apnea-Hypopnea Index (Supine): (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) / hour of sleep in supine from type I polysomnography

rdim2ps under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas in supine body position associated with >= 2% desaturation) / (hours of sleep)]

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

rdim3p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

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

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

rdim3pa under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

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

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

rdim3pns under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(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.

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

rdim3ps under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(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.

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

rdim4p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

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

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

rdim4pa under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

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

Apnea-Hypopnea Index (Non-Supine): (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 in non-supine from type I polysomnography

rdim4pns under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(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.

Apnea-Hypopnea Index (Supine): (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 in supine from type I polysomnography

rdim4ps under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(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.

Apnea-Hypopnea Index: (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) / hour of sleep from type I polysomnography

rdim5p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas associated with >= 5% desaturation) / (hours of sleep)]

Apnea-Hypopnea Index: (Apneas with >= 5% oxygen desaturation threshold used or with arousal+ hypopneas with > 50% flow reduction and with >= 5% oxygen desaturation used or with arousal) / hour of sleep from type I polysomnography

rdim5pa under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas with >= 5% desaturation or arousal) / (hours of sleep)]

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

rdim5pns under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas in non-supine body position associated with >= 5% desaturation) / (hours of sleep)]

Apnea-Hypopnea Index (Supine): (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) / hour of sleep in supine from type I polysomnography

rdim5ps under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Supine Respiratory Disturbance Index (RDI) at >=5% desaturation [(total number of apneas and hypopneas in supine body position associated with >=5% desaturation) / (hours of sleep)]

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

rdimnr0p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

Non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at all desaturations [(total number of apneas and hypopneas in non-rapid eye movement sleep (NREM)) / (hours of non-rapid eye movement sleep (NREM))]

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

rdimnr2p 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 >= 2% desaturation) / (hours of non-rapid eye movement sleep (NREM))]

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

rdimnr3p 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 >= 3% desaturation) / (hours of non-rapid eye movement sleep (NREM))]

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

rdimnr4p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas in non-rapid eye movement sleep associated with >= 4% desaturation) / (hours of non-rapid eye movement sleep (NREM))]