Related Variables

nsrr_ahi_hp4r Apnea-Hypopnea Index : (All apneas + hypopneas with >= 4% oxygen desaturation or with arousal) / hour of sleep

Harmonized by the NSRR team. Refer to the source for detailed definition for respiratory events: :ahi_a0h4a:

Harmonized/Polysomnography/Apnea-Hypopnea Indices