nsrr_ever_smoker nsrr_phrnumar_f1
Name
nsrr_ahi_chicago1999
Label
Apnea-Hypopnea Index: (All apneas + hypopneas with >50% flow reduction or discernible flow reduction with >=3% desat or arousal) / hour of sleep
Description

Harmonized by the NSRR team.

The definition of hypopnea events is consistent with the following clinical guidelines: American Academy of Sleep Medicine (AASM) Chicago 1999 standard. Sleep 1999 (PubMed ID:10450601)

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

Refer to the source for detailed definition for respiratory events: rditstpsg

Units
events per hour
Type
numeric
Tags
ahi_ap0uhp5x0u_ap0uhp3x3r_f1t1 chicago1999
Visit (Number) vs Apnea-Hypopnea Index: (All apneas + hypopneas with >50% flow reduction or discernible flow reduction with >=3% desat or arousal) / hour of sleep
N Mean StdDev Median Min Max Unknown Total
Baseline (BL) - - - - - - 1,516 1,516
Clinical Evaluation (CE) - - - - - - 1,516 1,516
Diagnostic Visit (DX) 1,223 38.2 ± 26.6 31.9 0.0 156.4 293 1,516
CPAP Titration Visit (CPAP) 1,064 22.4 ± 24.5 13.1 0.0 121.5 452 1,516
Two Month Post-CPAP Neurocognitive Visit (2M) 879 18.4 ± 22.6 9.0 0.0 131.5 637 1,516
Four Month Post-CPAP Neurocognitive Visit (4M) - - - - - - 1,516 1,516
Six Month Post-CPAP Neurocognitive Visit (6M) 849 17.5 ± 21.9 8.6 0.0 122.4 667 1,516