According to population-based studies, symptomatic obstructive sleep apnea appears to affect people over 50 years. Nearly 2 percent of women and 4 percent of men are known to complain of this condition. Asymptomatic Sleep Apnea is more common than symptomatic obstructive sleep apnea.
Among habitual loud snorers, the incidence of Obstructive Sleep Apnea (OSA) is about 17% in men and 15% in women.
Some researchers have noticed an increased incidence of OSA in persons of Asian origin.