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Definition of excessive daytime sleepiness in the general population: Feeling sleepy relates better to sleep-related symptoms and quality of life than the Epworth Sleepiness Scale score. Results from an epidemiological study
Natl Univ Hosp Iceland, Landspitali, Dept Med, Reykjavik, Iceland;Univ Iceland, Fac Med, Reykjavik, Iceland.
Univ Iceland, Fac Med, Reykjavik, Iceland;Natl Univ Hosp Iceland, Landspitali, Sleep Dept, Reykjavik, Iceland;Reykjavik Univ, Sch Sci & Engn, Reykjavik, Iceland.
Univ Iceland, Fac Med, Reykjavik, Iceland;Natl Univ Hosp Iceland, Landspitali, Sleep Dept, Reykjavik, Iceland.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Lung- allergy- and sleep research.ORCID iD: 0000-0001-5093-6980
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2019 (English)In: Journal of Sleep Research, ISSN 0962-1105, E-ISSN 1365-2869, Vol. 28, no 6, article id e12852Article in journal (Refereed) Published
Abstract [en]

Many different subjective tools are being used to measure excessive daytime sleepiness (EDS) but the most widely used is the Epworth Sleepiness Scale (ESS). However, it is unclear if using the ESS is adequate on its own when assessing EDS. The aim of this study was to estimate the characteristics and prevalence of EDS using the ESS and the Basic Nordic Sleep Questionnaire (BNSQ) in general population samples. Participants aged 40 years and older answered questions about sleepiness, health, sleep-related symptoms and quality of life. Two groups were defined as suffering from EDS: those who scored >10 on the ESS (with increased risk of dozing off) and those reporting feeling sleepy during the day >= 3 times per week on the BNSQ. In total, 1,338 subjects (53% male, 74.1% response rate) participated, 13.1% reported an increased risk of dozing off, 23.2% reported feeling sleepy and 6.4% reported both. The prevalence of restless leg syndrome, nocturnal gastroesophageal reflux, difficulties initiating and maintaining sleep and nocturnal sweating was higher among subjects reporting feeling sleepy compared to non-sleepy subjects. Also, subjects reporting feeling sleepy had poorer quality of life and reported more often feeling unrested during the day than non-sleepy subjects. However, subjects reporting increased risk of dozing off (ESS > 10) without feeling sleepy had a similar symptom profile as the non-sleepy subjects. Therefore, reporting only risk of dozing off without feeling sleepy may not reflect problematic sleepiness and more instruments in addition to ESS are needed when evaluating daytime sleepiness.

Place, publisher, year, edition, pages
WILEY , 2019. Vol. 28, no 6, article id e12852
Keywords [en]
Basic Nordic Sleep Questionnaire, subjective sleepiness
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
URN: urn:nbn:se:uu:diva-398029DOI: 10.1111/jsr.12852ISI: 000495679200020PubMedID: 30968492OAI: oai:DiVA.org:uu-398029DiVA, id: diva2:1375519
Funder
Swedish Heart Lung FoundationAstraZenecaAvailable from: 2019-12-05 Created: 2019-12-05 Last updated: 2019-12-05Bibliographically approved

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