Name
nsrr_ahi_hp4r
Label
Apnea-Hypopnea Index : (All apneas + hypopneas with >= 4% oxygen desaturation or with arousal) / hour of sleep
Description
Harmonized by the NSRR team. Refer to the source for detailed definition for respiratory events: poahi4a at Visit 1
Units
events per hour
Type
numeric
Tags