Name
ahi_a0h4
Label
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II 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_a0h4 = 60 * (hrembp4 + hrop4 + hnrbp4 + hnrop4 + urbp4 + urop4 + unrbp4 + unrop4 + carbp + carop + canbp + canop + oarbp + oarop + oanbp + oanop ) / slpprdp
Units
number of events per hour
Type
numeric
MESA exam number vs Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
N Mean StdDev Median Min Max Unknown Total
Exam 5 2,057 14.8 ± 16.7 9.1 0.0 102.9 180 2,237
Participant Age at MESA Sleep Visit vs Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Exam 5
N Mean StdDev Median Min Max Unknown Total
Total 2,057 14.8 ± 16.7 9.1 0.0 102.9 180 2,237
54.0 to 62.0 years 525 13.1 ± 16.5 6.5 0.0 102.9 35 560
62.0 to 69.0 years 532 15.4 ± 17.6 9.3 0.0 95.5 27 559
69.0 to 77.0 years 510 14.9 ± 15.8 9.5 0.0 75.7 49 559
77.0 to 95.0 years 490 16.1 ± 16.7 10.4 0.0 101.3 69 559
Gender of the participant vs Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Exam 5
N Mean StdDev Median Min Max Unknown Total
Total 2,057 14.8 ± 16.7 9.1 0.0 102.9 180 2,237
Female 1,103 11.1 ± 13.7 6.3 0.0 95.5 95 1,198
Male 954 19.1 ± 18.8 13.1 0.0 102.9 85 1,039
Race/ethnicity of the participant vs Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Exam 5
N Mean StdDev Median Min Max Unknown Total
Total 2,057 14.8 ± 16.7 9.1 0.0 102.9 180 2,237
White, Caucasian 743 13.4 ± 15.5 7.5 0.0 95.5 87 830
Chinese American 250 15.7 ± 16.4 10.2 0.0 74.6 15 265
Black, African-American 573 14.8 ± 17.7 8.5 0.0 102.9 43 616
Hispanic 491 16.6 ± 17.2 11.1 0.0 101.3 35 526