Epidemiology
OSA is more frequent than central sleep apnea and is the most common category of sleep-disordered breathing. It is a common condition in many parts of the world.
If studied carefully in a sleep lab by polysomnography (formal "sleep study"), it is believed by some authorities that approximately 1 in 5 American adults would have at least mild OSA. The precise prevalence of OSA among the adult population in western Europe and North America, however, has not been confidently established. In the mid-1990s it was estimated to be 3-4% of women and 6-7% of men.
Read more about this topic: Obstructive Sleep Apnea