The effect of daytime sleep and quality of nocturnal sleep on daytime sleepiness in patients with obstructive sleep apnoea
Abstract
The study showed the sleep latency lengthening significantly during the day (except in the MSLT3 test) and brought evidence of daytime sleepiness under the influence of the quality of nocturnal sleep and parameters of OSA severity. The salient factor responsible for excessive daytime sleepiness in OSA-affected patients was in the severity of the disease expressed in AHI and ODI as well as associated fragmentation of sleep measured by the number of arousals.
As the results also suggest, significant in terms of daytime sleepiness is the amount of delta sleep during the previous night. The study also shows differences between subjective and objective estimation of sleepiness as evidence of the patients' poor ability to rate the degree of their sleepines correctly.