ahi_a0h3a ahi_a0h4a

Related Variables

nsrr_ahi_hp4u_aasm15 Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction with >= 4% oxygen desaturation) / hour of sleep

Harmonized by the NSRR team.

The definition of hypopnea events is consistent with the following clinical guidelines: (1) AASM 2012 update (alternative) Berry RB et al. 2012 (PubMed ID:23066376), and (2) AASM 2015 (acceptable) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.].

Refer to the source for detailed definition for respiratory events: :ahi_a0h4: at Visit 3

 		Harmonized/Polysomnography/Apnea-Hypopnea Indices
canbp Total number of central apnea in NREM sleep in supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
canop Total number of central apnea in NREM sleep in non-supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
carbp Total number of central apnea in REM sleep in supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
carop Total number of central apnea in REM sleep in non-supine position: Central apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hnrbp4 Total number of hypopnea in NREM sleep in supine position : Hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hnrop4 Total number of hypopnea in NREM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hrembp4 Total number of hypopnea in REM sleep in supine position : Hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
hrop4 Total number of hypopnea in REM sleep in non-supine position : hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
oanbp Total number of obstructive apnea in NREM sleep in supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
oanop Total number of obstructive apnea in NREM sleep in non-supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
oarbp Total number of obstructive apnea in REM sleep in supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
oarop Total number of obstructive apnea in REM sleep in non-supine position: Obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type I polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Counts
slpprdp Total Sleep Duration: the interval between sleep onset time and lights on/out-bed time while the participant is asleep from type I polysomnography

Conventionally, this would be called total sleep time (TST) (i.e. total time spent in stage 1 or greater).

Total time from lights out to lights on that is scored as sleep (rounded to nearest minute)

 		Sleep Monitoring/Polysomnography/Sleep Architecture