Obesity and depression -- not only lack of sleep -- are underlying causes for regular drowsiness, according to Penn State College of Medicine researchers. They say the findings could lead to more personalized sleep medicine for those with excessive daytime sleepiness (EDS).
As much as 30 percent of the general population experiences EDS -- daytime drowsiness or sleepiness occurring most of the day that can include irresistible sleep attacks. Feeling overly tired during the day can reduce job productivity and increase errors and absenteeism and may lead to more serious issues like car crashes.
Previous research has associated EDS with obesity, depression and sleep apnea, but the new study is the first to use physiologic sleep data to infer causation and investigate mechanisms. It is also the first observational study of EDS over several years.
[For more go to http://www.sciencedaily.com/releases/2015/05/150507093154.htm]
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