AHI numbers (Alpha Hypopnea Index) are a method doctors use to classify the severity of sleep apnea in a person. Learn more about what these numbers mean for your sleep at WebMD.

When evaluating oxygen desaturation index scores with 4% desaturation, sleep-disordered breathing was found more often in men with vs. without HIV, according to study results published in CHEST ...

Of those who received AD109, 41% lowered their AHI 4 to fewer than 10 events per hour and 44% reached an AHI 4 that was lower than their baseline AHI 4 by more than 50%, according to the abstract.