Understanding AHI: Apnea-Hypopnea Index Scores
The apnea-hypopnea index (AHI) is the number of breathing pauses and shallow-breathing events per hour of sleep; in adults, under 5 is normal, 5–14 mild, 15–29 moderate and 30 or more severe sleep apnea.
Updated
The apnea-hypopnea index (AHI) is the headline number on any sleep apnea report. It counts breathing events per hour of sleep.
- An apnea is a near-complete stop in airflow lasting at least 10 seconds.
- A hypopnea is a partial reduction in airflow lasting at least 10 seconds, accompanied by an oxygen drop or an arousal.