The apnea-hypopnea index (AHI) measures sleep apnea to determine a range from mild to severe, based on the number of breathing pauses per hour you have while sleeping. Additionally, regular pauses ...

According to the American Sleep Disorders Association criteria, [35] apnea was defined as the pause of airflow at the nose and mouth lasting for > 10 s. Hypopnea was defined as a decrease of = 30% ...

which was defined as a gap between the presleep and postsleep CO levels, correlated with apnea-hypopnea index and hypoxia duration as a percentage of total sleep time. No difference was found in ...