The prevalence of sleep apnoea in adults is estimated to be seven percent. In contrast, in the US Federal Aviation Administration (FAA) records the prevalence
of sleep apnoea in Class I medical certified pilots is only 0.5 percent. Thus, sleep apnoea seems to be badly under diagnosed within pilot community. As sleep apnoea results in daytime sleepiness, un-diagnosed it can pose a significant safety risk in aviation.
This Briefing Leaflet provides additional information.