Related Variables
| ai_all |
Overall Arousal Index
Arousal Index - total arousals per hour of sleep [(Total number of arousals) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Arousals | |
| ai_nrem |
Arousal Index non-rapid eye movement sleep (NREM)
Non-rapid eye movement sleep (NREM) Arousal Index - total arousals in non-rapid eye movement sleep (NREM) per hours of non-rapid eye movement sleep (NREM) [(Total number of arousals in non-rapid eye movement sleep (NREM)) / (hours of non-rapid eye movement sleep (NREM))] |
Sleep/Polysomnography (PSG)/Arousals | |
| ahi_a0h3 | Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >=3% oxygen desaturation] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_a0h3a | Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >=3% oxygen desaturation or arousal] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_a0h4 | Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >=4% oxygen desaturation] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_a0h4a | Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >=4% oxygen desaturation or arousal] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_c0h3 | Central Apnea-Hypopnea Index (AHI) >= 3% - number of [central apneas] and [hypopneas with >=3% oxygen desaturation] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_c0h3a | Central Apnea-Hypopnea Index (AHI) >= 3% - number of [central apneas] and [hypopneas with >=3% oxygen desaturation or arousal] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_c0h4 | Central Apnea-Hypopnea Index (AHI) >= 4% - number of [central apneas] and [hypopneas with >=4% oxygen desaturation] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_c0h4a | Central Apnea-Hypopnea Index (AHI) >= 4% - number of [central apneas] and [hypopneas with >=4% oxygen desaturation or arousal] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_o0h3 | Obstructive Apnea-Hypopnea Index (AHI) >= 3% - number of [obstructive apneas] and [hypopneas with >=3% oxygen desaturation] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_o0h3a | Obstructive Apnea-Hypopnea Index (AHI) >= 3% - number of [obstructive apneas] and [hypopneas with >=3% oxygen desaturation or arousal] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_o0h4 | Obstructive Apnea-Hypopnea Index (AHI) >= 4% - number of [obstructive apneas] and [hypopneas with >=4% oxygen desaturation] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_o0h4a | Obstructive Apnea-Hypopnea Index (AHI) >= 4% - number of [obstructive apneas] and [hypopneas with >=4% oxygen desaturation or arousal] per hour of sleep | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| cai0p |
Central apnea index all desaturations
[(Total number of central apneas associated with all desaturations) / (hours of sleep)]. Will be missing if Total Sleep Time (TST) is 0. |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| cai4p |
Central apnea index >=4% desaturations
[(Total number of central apneas associated with >= 4% desaturations) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| cai4pa |
Central apnea index >=4% or arousal
[(Total number of central apneas with >= 4% desaturation or arousal) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| hi | Hypopnea Index >= 3% desaturation or arousal | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| oahi3 |
Obstructive apnea hypopnea (>=3% desaturation) index
{[(total number of obstructive apneas) + (total number of hypopneas associated with >= 3% desaturation)] / (hours of sleep)} |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| oahi4 |
Obstructive apnea hypopnea (>=4% desaturation) index
{[(total number of obstructive apneas) + (total number of hypopneas associated with >= 4% desaturation)] / (hours of sleep)} |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| oai0p |
Obstructive apnea index (all obstructives with all desaturations)
[(total number of obstructive apneas associated with all desaturations) / (hours of sleep)]. will be missing if Total Sleep Time (TST) is 0. |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| oai4p |
Obstructive apnea index >=4% desaturations
[(total number of obstructive apneas associated with >= 4% desaturation) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| oai4pa |
Obstructive apnea index >=4% or arousal
[(total number of obstructive apneas with >= 4% desaturation or arousal) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| omahi3 |
Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal) no centrals
{[(total number of obstructive apneas) + (total number of mixed apneas) + (total number of hypopneas associated with >= 3% desaturation or arousal)] / (hours of sleep)}. will be missing if Total Sleep Time (TST) is 0. |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| omahi3b |
Supine Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)
{[(total number of obstructive apneas) + (total number of mixed apneas) + (total number of hypopneas associated with >= 3% desaturation or arousal)] / (hours of sleep)}. will be missing if Total Sleep Time (TST) is 0. |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| omahi3nr |
Non-rapid eye movement sleep (NREM) Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)
{[(total number of obstructive apneas) + (total number of mixed apneas) + (total number of hypopneas associated with >= 3% desaturation or arousal)] / (hours of sleep)}. will be missing if Total Sleep Time (TST) is 0. |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| omahi3o |
Non-supine Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)
{[(total number of obstructive apneas) + (total number of mixed apneas) + (total number of hypopneas associated with >= 3% desaturation or arousal)] / (hours of sleep)}. will be missing if Total Sleep Time (TST) is 0. |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| omahi3r |
Rapid eye movement sleep (REM) Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)
{[(total number of obstructive apneas) + (total number of mixed apneas) + (total number of hypopneas associated with >= 3% desaturation or arousal)] / (hours of sleep)}. will be missing if Total Sleep Time (TST) is 0. |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| omai0p | Childhood Adenotonsillectomy Trial (CHAT) OMAI (obstructive/mixed apnea index all desaturations) no centrals | Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| omai4p |
Obstructive/mixed apnea index >=4% desaturations
[(total number of obstructive apneas associated with >= 4% desaturation+ total number of mixed apneas associated with >= 4% desaturation) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| omai4pa |
Obstructive/mixed apnea index >=4% or arousal
[(total number of obstructive apneas with >= 4% desaturation or arousal + total number of mixed apneas with >= 4% desaturation or arousal) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdim0p |
Overall Respiratory Disturbance Index (RDI) at 0% desaturation
[(total number of apneas and hypopneas) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdim0pa |
Overall Respiratory Disturbance Index (RDI) at 0% desaturation with arousal
[(total number of apneas and hypopneas with arousal) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdim2p |
Overall Respiratory Disturbance Index (RDI) at >=2% desaturation
[(total number of apneas and hypopneas associated with >= 2% desaturation) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdim2pa |
Overall Respiratory Disturbance Index (RDI) at >=2% desaturation or arousal
Respiratory Disturbance Index (RDI) at >=2% desaturation or arousal [(total number of apneas and hypopneas with >=2% desaturation or arousal) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdim3p |
Overall Respiratory Disturbance Index (RDI) at >=3% desaturation
[(total number of apneas and hypopneas associated with >= 3% desaturation) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdim3pa |
Overall Respiratory Disturbance Index (RDI) at >=3% desaturation or arousal
[(total number of apneas and hypopneas with >= 3% desaturation or arousal) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdim4p |
Overall Respiratory Disturbance Index (RDI) at >=4% desaturation
[(total number of apneas and hypopneas associated with >= 4% desaturation) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdim4pa |
Overall Respiratory Disturbance Index (RDI) at >=4% desaturation or arousal
[(total number of apneas and hypopneas with >= 4% desaturation or arousal) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdim5p |
Overall Respiratory Disturbance Index (RDI) at >=5% desaturation
[(total number of apneas and hypopneas associated with >= 5% desaturation) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdim5pa |
Overall Respiratory Disturbance Index (RDI) at >=5% desaturation or arousal
[(total number of apneas and hypopneas with >= 5% desaturation or arousal) / (hours of sleep)] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdimnr0p |
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at 0% desaturation
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))] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdimnr2p |
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=2% desaturation
[(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))] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdimnr3p |
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=3% desaturation
[(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))] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdimnr4p |
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=4% desaturation
[(total number of apneas and hypopneas in non-rapid eye movement sleep associated with >= 4% desaturation) / (hours of non-rapid eye movement sleep (NREM))] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdimnr5p |
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=5% desaturation
[(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))] |
Sleep/Polysomnography (PSG)/Respiratory Events/Indexes | |
| nsupinep |
Percentage time non-supine
[100*(number of minutes of sleep in non-supine body position) / (Total Sleep Time (TST))] |
Sleep/Polysomnography (PSG)/Sleep Architecture | |
| slp_eff |
Sleep efficiency percentage
Percentage of time in bed that was spent sleeping [100*(Total Sleep Time (TST)) / (total time in bed)] |
Sleep/Polysomnography (PSG)/Sleep Architecture | |
| supinep |
Percentage of time supine
Percent of sleep time in supine body position [100*(number of minutes of sleep in supine body position) / (Total Sleep Time (TST))] |
Sleep/Polysomnography (PSG)/Sleep Architecture | |
| waso |
Wake after sleep onset
Total amount of time spent awake after going to sleep [(time in bed) - (sleep latency) - (Total Sleep Time (TST))] |
Sleep/Polysomnography (PSG)/Sleep Architecture |