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. 2007 May;30(5):619-24.
doi: 10.1093/sleep/30.5.619.

Prevalence and risk factors of subjective sleepiness in the general adult population

Ståle Pallesen  1 , Inger Hilde Nordhus, Siri Omvik, Børge Sivertsen, Grethe S Tell, Bjørn Bjorvatn
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Prevalence and risk factors of subjective sleepiness in the general adult population

Ståle Pallesen et al. Sleep. 2007 May.

Abstract

Study objectives: The aim of this study was to investigate the prevalence and risk factors of self-reported excessive daytime sleepiness (EDS) in Norway.

Design: The Epworth Sleepiness Scale was administered by a telephone interview to a random sample of 2301 adult inhabitants of Norway. Questions of demography, symptoms of sleep disorders, and depression were included.

Setting: Norway.

Participants: Two thousand three hundred one subjects, 18 years and older.

Interventions: N/A.

Measurements and results: The mean score of the Epworth Sleepiness Scale was 6.95 (SD = 3.8), and 17.7% had a score (> 10), indicating EDS. Univariate logistic regression analyses showed that being a man; living in southern Norway; working nights; being young; having symptoms of cataplexy, restless legs, or periodic limb movement in sleep; having breathing pauses in sleep; and having symptoms of depression were significantly related to EDS. Of these 9 predictors, only symptoms of restless legs did not maintain the significant relationship with EDS when a multiple logistic regression analysis was performed.

Conclusions: The prevalence of EDS was high in this adult Norwegian population sample. EDS seems to be related to several symptoms of sleep disorders.

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