Name
omahi3
Label
Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography
Description

Calculated - Summary metric of sleep disordered breathing events. The definition of hypopnea events is consistent with the American Academy of Sleep Medicine (AASM) 2007 Manual (pediatric). [Iber C et al. The AASM manual for the scoring of sleep and associated events: rules, terminology and technical specifications. Vol. 1. Westchester, IL: American Academy of Sleep Medicine, 2007]

Search for all AHI variables consistent with the clinical guidelines within this dataset

Calculation
omahi3 = 60*(oarbp + oarop + oanbp + oanop + marbp + marop + manrbp + manrop + hremba3 +hroa3 + hnrba3 + hnroa3) / slpprdp
Units
events per hour
Type
numeric
Visit Number vs Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography
N Mean StdDev Median Min Max Unknown Total
Baseline 453 6.8 ± 5.6 4.7 1.1 29.3 - 453
Follow-up 407 3.8 ± 7.8 1.3 0.0 69.7 46 453
Treatment Arm vs Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 453 6.8 ± 5.6 4.7 1.1 29.3 - 453
Early adenotonsillectomy (EAT) 226 6.9 ± 5.7 4.8 1.2 27.7 - 226
Watchful waiting with supportive care (WWSC) 227 6.7 ± 5.7 4.5 1.1 29.3 - 227
Treatment Arm vs Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 407 3.8 ± 7.8 1.3 0.0 69.7 46 453
Early adenotonsillectomy (EAT) 199 1.6 ± 3.0 0.8 0.0 29.3 27 226
Watchful waiting with supportive care (WWSC) 208 5.9 ± 10.1 2.2 0.0 69.7 19 227
Child's age vs Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 453 6.8 ± 5.6 4.7 1.1 29.3 - 453
5 - 7 years old 329 6.6 ± 5.5 4.6 1.1 29.3 - 329
8 - 10 years old 124 7.2 ± 6.0 5.2 1.4 27.7 - 124
Child's age vs Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 397 3.8 ± 7.9 1.3 0.0 69.7 2 399
5 - 7 years old 260 3.9 ± 8.9 1.1 0.0 69.7 2 262
8 - 10 years old 137 3.6 ± 5.6 1.6 0.0 35.5 - 137
Child's gender vs Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 453 6.8 ± 5.6 4.7 1.1 29.3 - 453
Female 234 7.0 ± 5.7 4.9 1.2 29.3 - 234
Male 219 6.5 ± 5.6 4.5 1.1 26.0 - 219
Child's gender vs Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 407 3.8 ± 7.8 1.3 0.0 69.7 46 453
Female 209 4.1 ± 8.9 1.3 0.0 69.7 25 234
Male 198 3.5 ± 6.4 1.2 0.0 60.7 21 219
Child's race vs Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 453 6.8 ± 5.6 4.7 1.1 29.3 - 453
White 156 5.5 ± 4.7 3.7 1.1 25.4 - 156
Black 249 7.5 ± 5.9 5.5 1.2 29.3 - 249
Other 48 7.1 ± 6.4 4.5 1.4 25.0 - 48
Child's race vs Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) - Obstructive and Mixed Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ mixed apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and >= 3% oxygen desaturation or arousal) / hour of sleep from type I polysomnography
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 407 3.8 ± 7.8 1.3 0.0 69.7 46 453
White 147 3.2 ± 8.6 1.0 0.0 69.7 9 156
Black 217 4.4 ± 7.7 1.6 0.0 62.0 32 249
Other 43 2.7 ± 5.0 0.9 0.1 31.0 5 48