ahi_c0h3 ahi_c0h4
Name
ahi_c0h3a
Label
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Description

Calculated - Summary metric of sleep disordered breathing events. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). Berry RB et al. 2012 (PubMed ID:23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [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_c0h3a = 60 * (hremba3 + hroa3 + hnrba3 + hnroa3 + carbp + carop + canbp + canop) / slpprdp
Units
events per hour
Type
numeric
Tags
aasm15_recommended cahi_ca0uhp3x3r_f1t2
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 >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
N Mean StdDev Median Min Max Unknown Total
Visit 8 461 14.6 ± 12.2 11.2 0.0 73.8 - 461
Age (categorical) vs Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Visit 8
N Mean StdDev Median Min Max Unknown Total
Total 455 14.5 ± 11.8 11.2 0.0 73.1 - 455
75-84 years 325 13.5 ± 11.0 10.7 0.2 73.1 - 325
85 years or older 130 16.8 ± 13.4 12.9 0.0 59.6 - 130
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 >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Visit 8
N Mean StdDev Median Min Max Unknown Total
Total 461 14.6 ± 12.2 11.2 0.0 73.8 - 461
Female 461 14.6 ± 12.2 11.2 0.0 73.8 - 461