In an interview with MD Magazine, Andrew Varga, MD, explains the most cognitively-affected OSA patient population, and expanded on the association between sleep apnea and psychiatric conditions.
Varga: This was a group of older people, average age was around 68 years old. One of the really interesting things is that these were people that were recruited from the community and didn’t intrinsically have any sleep complaints. So they were not necessarily complaining that they had snoring or any other breathing issues with sleep apnea. They were not complaining of any cognitive complaints, were not complaining of any sleepiness.
from Sleep Review http://www.sleepreviewmag.com/2019/05/andrew-varga-md-how-sleep-apnea-affects-elderly-spatial-orientation/