Name
ahi_c0h4
Label
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Description
Calculated - Summary metric of sleep disordered breathing events.
Calculation
ahi_c0h4 = 60 * (hrembp4 + hrop4 + hnrbp4 + hnrop4 + urbp4 + urop4 + unrbp4 + unrop4 + carbp + carop + canbp + canop ) / slpprdp
Units
number of events per hour
Type
numeric
Tags