What is the threshold for sleep apnea diagnosis?
The threshold for diagnosis is AHI 5 with symptoms (eg, sleepiness). Prevalence of moderate to severe sleep apnea (AHI >15) among US adults 50 to 70 years of age is estimated to be 10%. Sleep apnea is associated with increased risk for mortality, and risk factors including sleep apnea affects 38% to 40% (AHI >20) of patients with stroke, with >90% of cases being OSA rather than central sleep.