DOT Certification Practice Exam

What is the maximum acceptable Apnea-Hypopnea Index (AHI) for untreated Obstructive Sleep Apnea (OSA)?

1. 10

2. 15

3. 20

4. 25

The correct answer is: 20

The maximum acceptable Apnea-Hypopnea Index (AHI) for untreated Obstructive Sleep Apnea (OSA) is defined as the threshold where the severity of OSA is classified. An AHI of 20 indicates a moderate degree of sleep apnea. Beyond this index, the disorder can have more significant health implications, including increased risks for cardiovascular problems, daytime fatigue, and decreased quality of life. Establishing the AHI classifications helps healthcare professionals determine the severity of the condition and appropriate treatment options. For instance, an AHI under 5 is considered normal; an AHI from 5 to 15 falls within a mild range, while 15 to 30 characterizes moderate OSA, and above 30 is classified as severe. Understanding where 20 fits in the spectrum of AHI values is crucial in recognizing the impact of untreated OSA on patient health and well-being. This is why an AHI of 20 serves as a key point of reference in clinical evaluations of OSA.