Name
cai4p
Label
Central Apnea Index: (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Description

Calculated - Summary metric of sleep disordered breathing events

Calculation
cai4p = 60 * ( carbp4 + carop4 + canbp4 + canop4 ) / slpprdp
Units
events per hour
Type
numeric
Visit number vs Central Apnea Index: (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
N Mean StdDev Median Min Max Unknown Total
Visit 8 461 0.3 ± 2.9 0.0 0.0 59.0 - 461
Age (categorical) vs Central Apnea Index: (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Visit 8
N Mean StdDev Median Min Max Unknown Total
Total 455 0.3 ± 2.9 0.0 0.0 59.0 - 455
75-84 years 325 0.4 ± 3.4 0.0 0.0 59.0 - 325
85 years or older 130 0.1 ± 0.4 0.0 0.0 2.9 - 130
Gender vs Central Apnea Index: (Central apneas with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Visit 8
N Mean StdDev Median Min Max Unknown Total
Total 461 0.3 ± 2.9 0.0 0.0 59.0 - 461
Female 461 0.3 ± 2.9 0.0 0.0 59.0 - 461