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|Abstract:||Obstructive sleep apnea (OSA) is now seen as one end of a spectrum of sleep-related breathing disorders. It is a common event, occurring to a signifi cant degree (more than fi ve events per hour of sleep) in 4-9% of the population . Severe disease (more than 50 events per hour) is associated with excess mortality  and patients present with complaints related to excessive daytime sleepiness, disturbed sleep, morning headache, impotence, and heavy snoring. In addition, OSA contributes to defi cits in a number of cognitive processes, including intellectual abilities, executive functions, memory, and learning . In a study by He et al. , the cumulative survival aft er 5 years in treated and untreated patients with an apnea index greater than 20 showed that cumulative survival was 100% for the continued positive airway pressure (CPAP) treated group versus about 75% for the untreated group. CPAP was demonstrated as effective in suppressing OSA, although long-term compliance remains a major problem. Many studies [3, 13, 14] report that patients with moderate to severe sleep apnea use their CPAP for only a mean of 4.7 h/night and for a mean 68% of their total sleep time. However, full-time use of CPAP is necessary to control the symptoms of OSA. © Springer-Verlag Berlin Heidelberg 2007.|
|Appears in Collections:||Scopus 1983-2021|
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