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2. Apnea–hypopnea index - Wikipedia

   en.wikipedia.org/wiki/Apnea–hypopnea_index

   The AHI is calculated by dividing the number of apnea events by the number of hours of sleep. The AHI values for adults are categorized as: [1] [2] Normal: AHI<5; Mild sleep apnea: 5≤AHI<15; Moderate sleep apnea: 15≤AHI<30; Severe sleep apnea: AHI≥30; For children, because of their different physiology, an AHI in excess of 1 is considered ...

3. Central sleep apnea - Wikipedia

   en.wikipedia.org/wiki/Central_sleep_apnea

   The conditions of hypoxia and hypercapnia, whether caused by apnea or not, trigger additional effects on the body.The immediate effects of central sleep apnea on the body depend on how long the failure to breathe endures, how short is the interval between failures to breathe, and the presence or absence of independent conditions whose effects amplify those of an apneic episode.

4. Sleep-related breathing disorder - Wikipedia

   en.wikipedia.org/wiki/Sleep-related_breathing...

   Sleep apnea is measured by the apnea-hypopnea index (AHI). An AHI is determined with a sleep study. AHI values for adults are categorized as: [2] [3] Normal: AHI<5; Mild sleep apnea: 5≤AHI<15; Moderate sleep apnea: 15≤AHI<30; Severe sleep apnea: AHI≥30; An episode is when a person hesitates to breathe or stops their breathing altogether.

5. What Is Sleep Apnea? Your Complete Guide - AOL

   www.aol.com/lifestyle/sleep-apnea-complete-guide...

   Sleep apnea is a common sleep disorder that affects more than 20 percent of people in the United States. It happens when your breathing temporarily stops while you sleep. Depending on the severity ...

6. Respiratory disturbance index - Wikipedia

   en.wikipedia.org/wiki/Respiratory_disturbance_index

   The respiratory disturbance index (RDI)—or respiratory distress Index—is a formula used in reporting polysomnography (sleep study) findings. Like the apnea-hypopnea index (AHI), it reports on respiratory distress events during sleep, but unlike the AHI, it also includes respiratory-effort related arousals (RERAs). [ 1 ]

7. Obstructive sleep apnea - Wikipedia

   en.wikipedia.org/wiki/Obstructive_sleep_apnea

   To grade the severity of sleep apnea, the number of events per hour is reported as the apnea-hypopnea index (AHI). For adults, an AHI of less than 5 is considered normal, an AHI of [5–15) is mild, [15–30) is moderate, and ≥30 events per hour characterizes severe sleep apnea.