Obstructive sleep apnoea (OSA)

A sleep-related breathing disorder characterised by periodic reduction (hypopnoea) or cessation (apnoea) of breathing due to narrowing or occlusion of the upper airway during sleep. It is diagnosed with an AHI ≥15 events/hour, or ≥5/hour if there are symptoms such as sleepiness or fatigue. An estimated 936 million adults worldwide have mild to severe OSA and 425 million have moderate to severe OSA.

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