ahi_c0h4 ahi_o0h3
Name
ahi_c0h4a
Label
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Description

Calculated - Summary metric of sleep disordered breathing events.

Calculation
ahi_c0h4a = 60 * (hremba4 + hroa4 + hnrba4 + hnroa4 + carbp + carop + canbp + canop) / slpprdp
Units
events per hour
Type
numeric
Tags
cahi_ca0uhp3x4r_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 >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
N Mean StdDev Median Min Max Unknown Total
Visit 8 461 10.6 ± 10.1 7.7 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 >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Visit 8
N Mean StdDev Median Min Max Unknown Total
Total 455 10.5 ± 9.6 7.7 0.0 65.5 - 455
75-84 years 325 9.7 ± 8.9 7.4 0.1 65.5 - 325
85 years or older 130 12.4 ± 10.9 8.8 0.0 54.7 - 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 >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Visit 8
N Mean StdDev Median Min Max Unknown Total
Total 461 10.6 ± 10.1 7.7 0.0 73.8 - 461
Female 461 10.6 ± 10.1 7.7 0.0 73.8 - 461