ahi_c0h3a ahi_c0h4a
Name
ahi_c0h4
Label
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 4% desaturation and with or without arousal) / hour of sleep from type I polysomnography
Description

Calculated - Summary metric of sleep disordered breathing events. 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.].

Search for all AHI variables consistent with the same clinical guidelines within this dataset

Calculation
ahi_c0h4 = 60 * (hrembp4 + hrop4 + hnrbp4 + hnrop4 + carbp + carop + canbp + canop) / slpprdp
Units
number of events per hour
Type
numeric
Tags
aasm15_acceptable cahi_ca0uhp3x4u_f1t1
Visit vs Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 4% desaturation and with or without arousal) / hour of sleep from type I polysomnography
N Mean StdDev Median Min Max Unknown Total
Peds - - - - - - - -
Teenz - - - - - - - -
TREC 515 0.7 ± 3.3 0.3 0.0 71.9 2 517
Age at time of visit vs Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 4% desaturation and with or without arousal) / hour of sleep from type I polysomnography
TREC
N Mean StdDev Median Min Max Unknown Total
Total 515 0.7 ± 3.3 0.3 0.0 71.9 2 517
16.14 to 17.41 years 130 0.6 ± 1.1 0.3 0.0 9.6 - 130
17.41 to 17.69 years 128 0.5 ± 0.6 0.3 0.0 4.2 1 129
17.69 to 17.91 years 129 1.3 ± 6.4 0.3 0.0 71.9 - 129
17.91 to 19.56 years 128 0.7 ± 1.1 0.4 0.0 10.5 1 129
Male gender vs Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 4% desaturation and with or without arousal) / hour of sleep from type I polysomnography
TREC
N Mean StdDev Median Min Max Unknown Total
Total 515 0.7 ± 3.3 0.3 0.0 71.9 2 517
No 255 0.4 ± 0.8 0.2 0.0 10.5 1 256
Yes 260 1.1 ± 4.6 0.5 0.0 71.9 1 261
Race vs Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 4% desaturation and with or without arousal) / hour of sleep from type I polysomnography
TREC
N Mean StdDev Median Min Max Unknown Total
Total 515 0.7 ± 3.3 0.3 0.0 71.9 2 517
White 307 0.9 ± 4.2 0.3 0.0 71.9 2 309
Black 185 0.6 ± 1.0 0.3 0.0 8.3 - 185
Other 23 0.5 ± 0.7 0.3 0.0 2.7 - 23