Related Variables
| ahi_a0h3 | Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep | Measurements/Polysomnography (PSG) | |
| 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 (PSG) | |
| ahi_a0h4 | Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep | Measurements/Polysomnography (PSG) | |
| 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 (PSG) | |
| ahi_c0h3 | Central Apnea-Hypopnea Index (AHI) >= 3% - number of [central apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep | Measurements/Polysomnography (PSG) | |
| 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 (PSG) | |
| ahi_c0h4 | Central Apnea-Hypopnea Index (AHI) >= 4% - number of [central apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep | Measurements/Polysomnography (PSG) | |
| 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 (PSG) | |
| ahi_o0h3 | Obstructive Apnea-Hypopnea Index (OAHI) >= 3% - number of [obstructive apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep | Measurements/Polysomnography (PSG) | |
| ahi_o0h3a | Obstructive Apnea-Hypopnea Index (OAHI) >= 3% - number of [obstructive apneas] and [hypopneas with >= 3% oxygen desaturation or arousal] per hour of sleep | Measurements/Polysomnography (PSG) | |
| ahi_o0h4 | Obstructive Apnea-Hypopnea Index (OAHI) >= 4% - number of [obstructive apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep | Measurements/Polysomnography (PSG) | |
| ahi_o0h4a | Obstructive Apnea-Hypopnea Index (OAHI) >= 4% - number of [obstructive apneas] and [hypopneas with >= 4% oxygen desaturation or arousal] per hour of sleep | Measurements/Polysomnography (PSG) | |
| ai_all |
Overall arousal index
Total number of arousals per hour of sleep. Ratio of count of arousals to total sleep time in hours. [(Total number of arousals) / (hours of sleep)] |
Measurements/Polysomnography (PSG) | |
| oahi3 |
Obstructive apnea (all oxygen desaturations) hypopnea (>= 3% oxygen desaturation) index
Ratio of the count of all obstructive apneas (all desaturations) plus the count of hypopneas associated with at least a >=3% oxygen desaturation to the total sleep time expressed in hours. |
Measurements/Polysomnography (PSG) | |
| oai0p |
Obstructive Apnea Index all oxygen desaturations
Obstructive Apnea Index at all desaturations [(Total number of obstructive apneas associated with all desaturations) / (hours of sleep)] |
Measurements/Polysomnography (PSG) | |
| rdi3p |
Overall Respiratory Disturbance Index (RDI) at >=3% oxygen desaturation
[(total number of apneas and hypopneas associated with >= 3% oxygen desaturation) / (hours of sleep)] |
Measurements/Polysomnography (PSG) | |
| 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. [100*(total sleep time) / (total time in bed)] |
Measurements/Polysomnography (PSG) |