Obstructive sleep apnea, daytime hypersomnolence and cognitive decline: a scary waterfall?

Excessive daytime sleepiness (EDS) in sleep-related breathing diseases is not only a public health problem but also a complex pathophysiological question for clinicans.1 Indeed, this daytime symptom is even absent in some obstructive sleep apnea (OSA) patients at high cardiovascular or cerebrovascular risk. Assessment of excessive daytime somnolence (EDS) poses a number of methodological problems and most epidemiological studies have used self-questionnaires for quantifying EDS. Self-assessment, however, could lead to underestimation or overestimation of daytime symptoms.

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