Related Variables
| ai_all |
Arousal Index
Total number of arousals per hour of sleep. Ratio of count of arousals to total sleep time in hours. |
Measurements/Polysomnography/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) |
Measurements/Polysomnography/Arousals | |
| ahi_a0h3 | Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep | Measurements/Polysomnography/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 | Measurements/Polysomnography/Respiratory Events/Indexes | |
| ahi_a0h4 | Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep | Measurements/Polysomnography/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 | Measurements/Polysomnography/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 | Measurements/Polysomnography/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 | Measurements/Polysomnography/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 | Measurements/Polysomnography/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 | Measurements/Polysomnography/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 | Measurements/Polysomnography/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 | Measurements/Polysomnography/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 | Measurements/Polysomnography/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 | Measurements/Polysomnography/Respiratory Events/Indexes | |
| cai0p | Central Apnea Index - numer of [central apneas] per hour of sleep | Measurements/Polysomnography/Respiratory Events/Indexes | |
| cai4p | Central Apnea Index >= 4% - number of [central apneas with >= 4% oxygen desaturation] per hour of sleep | Measurements/Polysomnography/Respiratory Events/Indexes | |
| cai4pa | Central Apnea Index >= 4% - number of [central apneas with >= 4% oxygen desaturation or arousal] per hour of sleep | Measurements/Polysomnography/Respiratory Events/Indexes | |
| oahi |
Obstructive Apnea-Hypopnea Index (OAHI) at >=4% oxygen desaturation
Obstructive apnea (all desaturations) hypopnea (>=4% desaturation) index |
Measurements/Polysomnography/Respiratory Events/Indexes | |
| oai0p | Obstructive Apnea Index - number of [obstructive apneas] per hour of sleep | Measurements/Polysomnography/Respiratory Events/Indexes | |
| oai4p | Obstructive Apnea Index >= 4% - number of [obstructive apneas with >= 4% oxygen desaturation] per hour of sleep | Measurements/Polysomnography/Respiratory Events/Indexes | |
| oai4pa | Obstructive Apnea Index >= 4% - number of [obstructive apneas with >= 4% oxygen desaturation or arousal] per hour of sleep | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi0p | Overall Respiratory Disturbance Index (RDI) all oxygen desaturations | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi0pa | Overall Respiratory Disturbance Index (RDI) all oxygen desaturations with an arousal | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi2p | Overall Respiratory Disturbance Index (RDI) at >=2% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi2pa | Overall Respiratory Disturbance Index (RDI) at >=2% oxygen desaturation or arousal | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi3p | Overall Respiratory Disturbance Index (RDI) at >=3% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi3pa | Overall Respiratory Disturbance Index (RDI) at >=3% oxygen desaturation or arousal | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi4p |
Overall Respiratory Disturbance Index (RDI) at >=4% oxygen desaturation
Ratio of the count of all apneas (central and obstructive) and hypopneas associated with at least a >=4% oxygen desaturation to the total sleep time expressed in hours |
Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi4pa | Overall Respiratory Disturbance Index (RDI) at >=4% oxygen desaturation or arousal | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi5p | Overall Respiratory Disturbance Index (RDI) at >=5% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdi5pa | Overall Respiratory Disturbance Index (RDI) at >=5% oxygen desaturation or arousal | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdinr0p | Overall Respiratory Disturbance Index (RDI) (Non-rapid eye movement sleep (NREM)) all oxygen desaturations | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdinr2p | Overall Respiratory Disturbance Index (RDI) (Non-rapid eye movement sleep (NREM)) at >=2% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdinr3p | Overall Respiratory Disturbance Index (RDI) (Non-rapid eye movement sleep (NREM)) at >=3% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdinr4p | Overall Respiratory Disturbance Index (RDI) (Non-rapid eye movement sleep (NREM)) at >=4% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes | |
| rdinr5p | Overall Respiratory Disturbance Index (RDI) (Non-rapid eye movement sleep (NREM)) at >=5% oxygen desaturation | Measurements/Polysomnography/Respiratory Events/Indexes | |
| nsupinep |
Percent Time non-supine
Percent of sleep time in non-supine body position |
Measurements/Polysomnography/Sleep Architecture | |
| slp_eff |
Sleep Efficiency
Percentage of time in bed that was spent sleeping, or the ratio of total sleep time to total time in bed, expressed as a percentage. |
Measurements/Polysomnography/Sleep Architecture | |
| slp_rdi |
Sleep time used in calculations
Total time from lights out to lights on that is scored as sleep, rounded to nearest minute |
Measurements/Polysomnography/Sleep Architecture | |
| supinep | Percent Time supine | Measurements/Polysomnography/Sleep Architecture | |
| waso |
Wake After Sleep Onset
Total amount of time spent awake after going to sleep |
Measurements/Polysomnography/Sleep Architecture |