What value for the apnea-hypopnea index (AHI) is consistent with moderate obstructive sleep apnea?
a. 5 to 15
b. 15 to 30
c. Above 30
d. Below 5
ANS: B
The AASM has operationally defined the severity of obstructive sleep apnea as follows: mild, AHI 5 to 15; moderate, AHI 15 to 30; and severe, AHI greater than 30.
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