Related Variables
| nsrr_ttldursp_f1 |
Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from polysomnography
Conventionally, this would be called total sleep time (TST) (i.e. total time spent in stage 1 or greater). |
Harmonized/Polysomnography/Sleep Architecture | |
| ai_all |
Arousal Index
Total number of arousals per hour of sleep. Ratio of count of arousals to total sleep time in hours. |
Polysomnography (PSG)/Arousals | |
| ai_nrem |
Arousal index (Non-rapid eye movement sleep (NREM))
Total arousals in non-rapid eye movement sleep (NREM) per hours of non-rapid eye movement sleep (NREM) |
Polysomnography (PSG)/Arousals | |
| ahi_a0h3 | Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of 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 | 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 | 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 | Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_c0h3 | Central Apnea-Hypopnea Index (CAHI) >= 3% - number of [central apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep | Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_c0h3a | Central Apnea-Hypopnea Index (CAHI) >= 3% - number of [central apneas] and [hypopneas with >= 3% oxygen desaturation or arousal] per hour of sleep | Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_c0h4 | Central Apnea-Hypopnea Index (CAHI) >= 4% - number of [central apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep | Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_c0h4a | Central Apnea-Hypopnea Index (CAHI) >= 4% - number of [central apneas] and [hypopneas with >= 4% oxygen desaturation or arousal] per hour of sleep | Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_o0h3 | Obstructive Apnea-Hypopnea Index (OAHI) >= 3% - number of [obstructive apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep | Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_o0h3a | Obstructive Apnea-Hypopnea Index (OAHI) >= 3% - number of [obstructive apneas] and [hypopneas with >= 3% oxygen desaturation or arousal] per hour of sleep | Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_o0h4 | Obstructive Apnea-Hypopnea Index (OAHI) >= 4% - number of [obstructive apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep | Polysomnography (PSG)/Respiratory Events/Indexes | |
| ahi_o0h4a | Obstructive Apnea-Hypopnea Index (OAHI) >= 4% - number of [obstructive apneas] and [hypopneas with >= 4% oxygen desaturation or arousal] per hour of sleep | Polysomnography (PSG)/Respiratory Events/Indexes | |
| cai0p | Central Apnea Index (CAI) all oxygen desaturations | Polysomnography (PSG)/Respiratory Events/Indexes | |
| cai4p | Central Apnea Index (CAI) >= 4% oxygen desaturation | Polysomnography (PSG)/Respiratory Events/Indexes | |
| cai4pa | Central Apnea Index (CAI) >= 4% oxygen desaturation or arousal | Polysomnography (PSG)/Respiratory Events/Indexes | |
| oai0p | Obstructive Apnea Index (OAI) all oxygen desaturations | Polysomnography (PSG)/Respiratory Events/Indexes | |
| oai4p | Obstructive Apnea Index (OAI) >= 4% oxygen desaturation | Polysomnography (PSG)/Respiratory Events/Indexes | |
| oai4pa | Obstructive Apnea Index (OAI) >= 4% oxygen desaturation or arousal | Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdi0p | Overall Respiratory Disturbance Index (RDI) all oxygen desaturations | Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdi0pa | Overall Respiratory Disturbance Index (RDI) all oxygen desaturations or arousal | Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdi2p |
Overall Respiratory Disturbance Index (RDI) at >= 2% oxygen desaturation
[(total number of apneas and hypopneas associated with >= 2% oxygen desaturation) / (hours of sleep)] |
Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdi2pa |
Overall Respiratory Disturbance Index (RDI) at >= 2% oxygen desaturation or arousal
[(total number of apneas and hypopneas with >= 2% oxygen desaturation or arousal) / (hours of sleep)] |
Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdi3p |
Overall Respiratory Disturbance Index (RDI) at >= 3% oxygen desaturation
[(total number of apneas and hypopneas associated with >= 3% oxygen desaturation) / (hours of sleep)] |
Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdi3pa |
Overall Respiratory Disturbance Index (RDI) at >= 3% oxygen desaturation or arousal
[(total number of apneas and hypopneas with >= 3% oxygen desaturation or arousal) / (hours of sleep)] |
Polysomnography (PSG)/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 |
Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdi4pa |
Overall Respiratory Disturbance Index (RDI) at >= 4% oxygen desaturation or arousal
[(total number of apneas and hypopneas with >= 4% oxygen desaturation or arousal) / (hours of sleep)] |
Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdi5p |
Overall Respiratory Disturbance Index (RDI) at >= 5% oxygen desaturation
[(total number of apneas and hypopneas associated with >= 5% oxygen desaturation) / (hours of sleep)] |
Polysomnography (PSG)/Respiratory Events/Indexes | |
| rdi5pa |
Overall Respiratory Disturbance Index (RDI) at >= 5% oxygen desaturation or arousal
[(total number of apneas and hypopneas with >= 5% oxygen desaturation or arousal) / (hours of sleep)] |
Polysomnography (PSG)/Respiratory Events/Indexes | |
| 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 (PSG)/Sleep Architecture |