slpa56 slpa64
Name
slpa63
Label
Respiratory Event Index: (Apneas with >= 4% oxygen desaturation + hypopneas with > 50% flow reduction and >= 4% oxygen desaturation) / hours of artifact-free estimated sleep from type IV home sleep apnea test
Description

Estimated sleep duration, providing an approximation of total sleep duration (i.e. total sleep time) inferred from analysis of non-EEG channels Zhao et al., 2017 (PMID:27707441) Any continuous periods of >=20 min with loss of respiratory channel was marked as wake and not included in the estimates. Please refer to slpa30 for the valid estimated sleep duration used to calculate this index.

Units
events per hour
Type
numeric
Tags
rei_ap4nhp5x4n_f1t4
Visit Number vs Respiratory Event Index: (Apneas with >= 4% oxygen desaturation + hypopneas with > 50% flow reduction and >= 4% oxygen desaturation) / hours of artifact-free estimated sleep from type IV home sleep apnea test
N Mean StdDev Median Min Max Unknown Total
Baseline 12,442 4.5 ± 10.3 0.9 0.0 128.3 3,973 16,415
Sueño Ancillary - - - - - - - -
Gender vs Respiratory Event Index: (Apneas with >= 4% oxygen desaturation + hypopneas with > 50% flow reduction and >= 4% oxygen desaturation) / hours of artifact-free estimated sleep from type IV home sleep apnea test
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 12,442 4.5 ± 10.3 0.9 0.0 128.3 1,713 14,155
Female 7,370 3.2 ± 7.7 0.6 0.0 104.1 988 8,358
Male 5,072 6.3 ± 13.0 1.5 0.0 128.3 725 5,797