What was the apnea-hypopnea index (AHI) reported in the data?

What was the apnea-hypopnea index (AHI) reported in the data?

• A. 4/hr
• B. 9/hr
• C. 36/hr
• D. 5/hr

Answer: (C)

AHI is the number of apneas plus hypopneas that occur per hour of sleep. To get it, you sum all qualifying respiratory events scored during sleep and divide by the total hours of sleep. A value of 36 per hour means there were many breathing interruptions packed into each hour of sleep. Clinically, this sits in the severe range (normal <5, mild 5–15, moderate 15–30, severe >30). So the data showing an AHI of 36/hr best fits the indicated result, while the smaller values would not reflect the observed density of events.

AHI is the number of apneas plus hypopneas that occur per hour of sleep. To get it, you sum all qualifying respiratory events scored during sleep and divide by the total hours of sleep. A value of 36 per hour means there were many breathing interruptions packed into each hour of sleep. Clinically, this sits in the severe range (normal <5, mild 5–15, moderate 15–30, severe >30). So the data showing an AHI of 36/hr best fits the indicated result, while the smaller values would not reflect the observed density of events.