Name
ahi_a0h4a
Label
Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >= 4% oxygen desaturation or arousal] per hour of sleep
Calculation
ahi_a0h4a = 60 * (hremba4 + hroa4 + hnrba4 + hnroa4 + urbpa4 + uropa4 + unrbpa4 + unropa4 + carbp + carop + canbp + canop + oarbp + oarop + oanbp + oanop ) / slpprdp
Units
events per hour
Type
numeric
Tags