Obstructive sleep apnoea (OSA) and resultant sleep fragmentation and oxygen desaturation have been associated with daytime sleepiness, cognitive impairment, Type 2 diabetes, cardiovascular disease, stroke, increased risk of motor vehicle accidents and can have significant effects on quality of life. It can affect 4% to 9% of the middle-aged population (up to 34% of men in some studies) and is two to three times more common in older individuals than those under 64 years.
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