cahi_ca0uhp3x4r_f1t1 cai_ca0u_f1t1
Name
cahi_ca0uhp3x4u_f1t1
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
cahi_ca0uhp3x4u_f1t1 = 60 * (hrembp4 + hrop4 + hnrbp4 + hnrop4 + urbp4 + urop4 + unrbp4 + unrop4 + carbp + carop + canbp + canop) / ttldursp
Units
events per hour
Type
numeric
Tags
aasm15_acceptable ahi_c0h4 cahi_c0uh3x4u cahi_ca0uhp3x4u
Visit number 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
Baseline 49 28.4 ± 15.0 25.8 0.4 58.2 - 49
9-Month Followup 43 19.8 ± 15.8 15.5 1.7 74.0 - 43
18-Month Followup 40 21.9 ± 17.7 18.3 1.6 72.7 - 40
Randomized treatment arm 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
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 49 28.4 ± 15.0 25.8 0.4 58.2 - 49
Laparoscopic Gastric Banding (LGB) 28 30.6 ± 14.4 28.7 6.4 58.2 - 28
Continuous Positive Airway Pressure (CPAP) 21 25.3 ± 15.6 20.9 0.4 54.0 - 21
Randomized treatment arm 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
9-Month Followup
N Mean StdDev Median Min Max Unknown Total
Total 43 19.8 ± 15.8 15.5 1.7 74.0 - 43
Laparoscopic Gastric Banding (LGB) 25 22.1 ± 17.6 15.7 1.8 74.0 - 25
Continuous Positive Airway Pressure (CPAP) 18 16.6 ± 12.8 13.0 1.7 39.0 - 18
Randomized treatment arm 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
18-Month Followup
N Mean StdDev Median Min Max Unknown Total
Total 40 21.9 ± 17.7 18.3 1.6 72.7 - 40
Laparoscopic Gastric Banding (LGB) 24 20.7 ± 18.0 16.6 1.6 72.7 - 24
Continuous Positive Airway Pressure (CPAP) 16 23.7 ± 17.7 23.0 3.5 60.3 - 16
Age of the participant 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
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 49 28.4 ± 15.0 25.8 0.4 58.2 - 49
27.0 to 45.0 years 13 25.5 ± 15.8 23.8 0.4 52.1 - 13
46.0 to 50.0 years 12 27.1 ± 13.2 25.5 6.4 52.4 - 12
51.0 to 56.0 years 12 27.7 ± 16.3 21.5 10.6 56.7 - 12
57.0 to 65.0 years 12 33.3 ± 15.0 29.0 14.4 58.2 - 12
Age of the participant 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
9-Month Followup
N Mean StdDev Median Min Max Unknown Total
Total 43 19.8 ± 15.8 15.5 1.7 74.0 - 43
28.0 to 47.0 years 11 15.7 ± 12.5 15.5 1.9 33.4 - 11
47.0 to 52.0 years 11 17.4 ± 13.9 14.6 1.7 39.0 - 11
52.0 to 58.0 years 11 18.9 ± 14.9 13.6 1.8 46.0 - 11
58.0 to 65.0 years 10 27.8 ± 20.8 27.6 4.2 74.0 - 10
Age of the participant 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
18-Month Followup
N Mean StdDev Median Min Max Unknown Total
Total 40 21.9 ± 17.7 18.3 1.6 72.7 - 40
29.0 to 46.0 years 10 25.8 ± 17.1 26.1 4.5 60.3 - 10
47.0 to 52.0 years 10 20.4 ± 16.7 18.1 1.6 51.8 - 10
53.0 to 58.0 years 10 19.2 ± 17.6 13.7 3.9 59.9 - 10
58.0 to 65.0 years 10 22.3 ± 21.2 15.5 2.1 72.7 - 10
Gender of the participant 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
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 49 28.4 ± 15.0 25.8 0.4 58.2 - 49
Male 28 30.3 ± 14.9 28.7 7.9 58.2 - 28
Female 21 25.7 ± 15.0 21.7 0.4 57.5 - 21
Gender of the participant 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
9-Month Followup
N Mean StdDev Median Min Max Unknown Total
Total 43 19.8 ± 15.8 15.5 1.7 74.0 - 43
Male 25 22.5 ± 17.6 19.2 1.9 74.0 - 25
Female 18 16.0 ± 12.5 13.5 1.7 39.0 - 18
Gender of the participant 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
18-Month Followup
N Mean StdDev Median Min Max Unknown Total
Total 40 21.9 ± 17.7 18.3 1.6 72.7 - 40
Male 25 23.2 ± 15.7 23.7 3.9 72.7 - 25
Female 15 19.9 ± 21.1 10.8 1.6 60.3 - 15
Race of the participant 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
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 46 29.0 ± 15.1 25.9 0.4 58.2 - 46
white 35 26.9 ± 15.4 23.1 0.4 58.2 - 35
american indian or alaska native - - - - - - - -
black or african american 9 35.2 ± 12.7 38.2 14.1 54.0 - 9
asian 2 37.7 ± 16.6 37.7 26.0 49.4 - 2
native hawaiian or other pacific islander - - - - - - - -
other - - - - - - - -
multiple - - - - - - - -
Race of the participant 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
9-Month Followup
N Mean StdDev Median Min Max Unknown Total
Total 40 20.1 ± 16.0 15.6 1.7 74.0 - 40
white 31 17.7 ± 12.7 15.5 1.7 46.0 - 31
american indian or alaska native - - - - - - - -
black or african american 8 31.4 ± 22.8 36.7 3.5 74.0 - 8
asian 1 2.8 - 2.8 2.8 2.8 - 1
native hawaiian or other pacific islander - - - - - - - -
other - - - - - - - -
multiple - - - - - - - -
Race of the participant 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
18-Month Followup
N Mean StdDev Median Min Max Unknown Total
Total 37 22.8 ± 18.1 19.8 1.6 72.7 - 37
white 29 19.7 ± 14.5 19.8 1.6 60.3 - 29
american indian or alaska native - - - - - - - -
black or african american 7 38.2 ± 24.8 41.2 10.5 72.7 - 7
asian 1 4.5 - 4.5 4.5 4.5 - 1
native hawaiian or other pacific islander - - - - - - - -
other - - - - - - - -
multiple - - - - - - - -