What is the prevalence of Obstructive Sleep Apnea?
The prevalence is dependent on the definition of OSA. The earliest epidemiologic investigations, primarily of white men, estimated up to 4% had OSA (60%–90% were obese). The prevalence of OSA for adults age 30 to 60 years is currently 24% in men and 9% in women . Obesity is a major risk factor. In nonobese patients, genetic craniofacial features, such as retrognathia (maxillary insufficiency), are correlated with OSA. As more data on OSA emerge, the prevalence may become unique to populations or ethnicities. For example, in Asian nonobese male office workers, BMI and age were positively correlated, but the correlation with weight was less than in white, non-Asian subjects. Risk factors for OSA other than adiposity, such as pharyngeal narrowing, retrognathia or micrognathia, and pharyngeal collapsibility, are thought to assume greater pathologic significance in Asians.