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. |
Polysomnography/Arousals | |
| ai_nrem |
Arousal Index (NREM)
Non-REM Arousal Index - total arousals in non-REM sleep per hours of non-REM sleep |
Polysomnography/Arousals | |
| ahi_a0h3 | Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | Polysomnography/Respiratory Events/Indexes | |
| cai0p | Central Apnea Index - numer of [central apneas] per hour of sleep | Polysomnography/Respiratory Events/Indexes | |
| cai4p | Central Apnea Index >= 4% - number of [central apneas with >= 4% oxygen desaturation] per hour of sleep | Polysomnography/Respiratory Events/Indexes | |
| cai4pa | Central Apnea Index >= 4% - number of [central apneas with >= 4% oxygen desaturation or arousal] per hour of sleep | Polysomnography/Respiratory Events/Indexes | |
| oahi | Obstructive Apnea Hypopnea Index (OAHI) at 4% oxygen desaturation | Polysomnography/Respiratory Events/Indexes | |
| oai0p | Obstructive Apnea Index - number of [obstructive apneas] per hour of sleep | Polysomnography/Respiratory Events/Indexes | |
| oai4p | Obstructive Apnea Index >= 4% - number of [obstructive apneas with >= 4% oxygen desaturation] per hour of sleep | Polysomnography/Respiratory Events/Indexes | |
| oai4pa | Obstructive Apnea Index >= 4% - number of [obstructive apneas with >= 4% oxygen desaturation or arousal] per hour of sleep | Polysomnography/Respiratory Events/Indexes | |
| rdi0p | Overall RDI all oxygen desaturations | Polysomnography/Respiratory Events/Indexes | |
| rdi0pa | Overall RDI all oxygen desaturations or arousal | Polysomnography/Respiratory Events/Indexes | |
| rdi2p | Overall RDI at 2% oxygen desaturation | Polysomnography/Respiratory Events/Indexes | |
| rdi2pa | Overall RDI at 2% oxygen desaturation or arousal | Polysomnography/Respiratory Events/Indexes | |
| rdi3p | Overall RDI at 3% oxygen desaturation | Polysomnography/Respiratory Events/Indexes | |
| rdi3pa | Overall RDI at 3% oxygen desaturation or arousal | Polysomnography/Respiratory Events/Indexes | |
| rdi4p |
Overall 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 |
Polysomnography/Respiratory Events/Indexes | |
| rdi4pa | Overall RDI at 4% oxygen desaturation or arousal | Polysomnography/Respiratory Events/Indexes | |
| rdi5p | Overall RDI at 5% oxygen desaturation | Polysomnography/Respiratory Events/Indexes | |
| rdi5pa | Overall RDI at 5% oxygen desaturation or arousal | Polysomnography/Respiratory Events/Indexes | |
| rdinr0p | Overall RDI (NREM) all oxygen desaturations | Polysomnography/Respiratory Events/Indexes | |
| rdinr2p | Overall RDI (NREM) at 2% oxygen desaturation | Polysomnography/Respiratory Events/Indexes | |
| rdinr3p | Overall RDI (NREM) at 3% oxygen desaturation | Polysomnography/Respiratory Events/Indexes | |
| rdinr4p | Overall RDI (NREM) at 4% oxygen desaturation | Polysomnography/Respiratory Events/Indexes | |
| rdinr5p | Overall RDI (NREM) at 5% oxygen desaturation | Polysomnography/Respiratory Events/Indexes | |
| nsupinep |
Percent Time non-supine
Percent of sleep time in non-supine body position |
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. |
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 |
Polysomnography/Sleep Architecture | |
| supinep |
Percent Time supine
Percent of sleep time in supine body position |
Polysomnography/Sleep Architecture | |
| waso |
Wake After Sleep Onset
Total amount of time spent awake after going to sleep |
Polysomnography/Sleep Architecture |