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Are symptoms of insomnia related to respiratory symptoms? Cross-sectional results from 10 European countries and Australia

Are symptoms of insomnia related to respiratory symptoms? Cross-sectional results from 10 European countries and Australia


Title: Are symptoms of insomnia related to respiratory symptoms? Cross-sectional results from 10 European countries and Australia
Author: Björnsdóttir, Erla   orcid.org/0000-0002-6585-5777
Lindberg, Eva
Benediktsdóttir, Bryndís
Gislason, Thorarinn   orcid.org/0000-0002-6773-9876
Garcia Larsen, Vanessa
Franklin, Karl
Jarvis, Debbie
Demoly, Pascal
Perret, Jennifer L
Garcia Aymerich, Judith
... 5 more authors Show all authors
Date: 2020-04-28
Language: English
Scope: e032511
University/Institute: Háskóli Íslands
University of Iceland
Háskólinn í Reykjavík
Reykjavik University
School: Heilbrigðisvísindasvið (HÍ)
School of Health Sciences (UI)
Department: Læknadeild (HÍ)
Faculty of Medicine (UI)
Series: BMJ Open;10(4)
ISSN: 2044-6055
DOI: 10.1136/bmjopen-2019-032511
Subject: Insomnia; Respiratory symptoms; Sleep medicine; Svefnleysi; Öndunarfærasjúkdómar; Svefnlyf
URI: https://hdl.handle.net/20.500.11815/2371

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Citation:

Bjornsdottir E, Lindberg E, Benediktsdottir B, et alAre symptoms of insomnia related to respiratory symptoms? Cross-sectional results from 10 European countries and AustraliaBMJ Open 2020;10:e032511. doi: 10.1136/bmjopen-2019-032511

Abstract:

Objectives To compare the prevalence of different insomnia subtypes among middle-Aged adults from Europe and Australia and to explore the cross-sectional relationship between insomnia subtypes, respiratory symptoms and lung function. Design Cross-sectional population-based, multicentre cohort study. Setting 23 centres in 10 European countries and Australia. Methods We included 5800 participants in the third follow-up of the European Community Respiratory Health Survey III (ECRHS III) who answered three questions on insomnia symptoms: difficulties falling asleep (initial insomnia), waking up often during the night (middle insomnia) and waking up early in the morning and not being able to fall back asleep (late insomnia). They also answered questions on smoking, general health and chronic diseases and had the following lung function measurements: forced expiratory volume in 1 s (FEV 1), forced vital capacity (FVC) and the FEV 1 /FVC ratio. Changes in lung function since ECRHS I about 20 years earlier were also analysed. Main outcome measures Prevalence of insomnia subtypes and relationship to respiratory symptoms and function. Results Overall, middle insomnia (31.2%) was the most common subtype followed by late insomnia (14.2%) and initial insomnia (11.2%). The highest reported prevalence of middle insomnia was found in Iceland (37.2%) and the lowest in Australia (22.7%), while the prevalence of initial and late insomnia was highest in Spain (16.0% and 19.7%, respectively) and lowest in Denmark (4.6% and 9.2%, respectively). All subtypes of insomnia were associated with significantly higher reported prevalence of respiratory symptoms. Only isolated initial insomnia was associated with lower FEV 1, whereas no association was found between insomnia and low FEV 1 /FVC ratio or decline in lung function. Conclusion There is considerable geographical variation in the prevalence of insomnia symptoms. Middle insomnia is most common especially in Iceland. Initial and late insomnia are most common in Spain. All insomnia subtypes are associated with respiratory symptoms, and initial insomnia is also associated with lower FEV 1.

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This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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