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Anxiety mediates the effect of smoking on insomnia in people with asthma:evidence from the HUNT3 study

Andenæs, Randi; Schwartz, Carolyn
Journal article, Peer reviewed
© 2016 andenæs and schwartz. this work is published and licensed by dove medical press limited. the full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the creative commons attribution – non commercial (unported, v3.0) license (http://creativecommons.org/licenses/by-nc/3.0/). by accessing the work you hereby accept the terms. non-commercial uses of the work are permitted without any further permission from dove medical press limited, provided the work is properly attributed. for permission for commercial use of this work, please see paragraphs 4.2 and 5 of our terms (https://www.dovepress.com/terms.php).
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URI
https://hdl.handle.net/10642/3117
Date
2016
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  • HV - Institutt for sykepleie og helsefremmende arbeid [1293]
Original version
Andenæs, R., & Schwartz, C. E. (2016). Anxiety mediates the effect of smoking on insomnia in people with asthma: evidence from the HUNT3 study. Journal of Multidisciplinary Healthcare, 9, 21.   http://dx.doi.org/10.2147/JMDH.S98784
Abstract
Objective:

The aim of this study was to investigate factors related to insomnia in a cohort of

people with asthma.

Design:

This secondary analysis utilized cross-sectional data from the Norwegian Nord-

Trøndelag Health Study, a population-based health survey (n

=

50,807).

Participants:

We used self-reported data from 1,342 men and women with a physician-

confirmed asthma diagnosis ranging in age from 19.5 to 91 years.

Measurements:

Data on sleep, lifestyle variables (smoking and exercise), anxiety, and depres

-

sion were included. An insomnia scale and asthma impact scale were constructed using factor

analysis. Hierarchical series of multiple regression models were used to investigate direct and

mediational relationships between the study variables and insomnia.

Results:

The hierarchical models revealed significant independent contributions of female sex,

higher age, not exercising, asthma impact, anxiety, and depression on insomnia (

R

2

=

25.2%).

Further, these models suggested that the impact of smoking on insomnia was mediated by anxiety,

and that the beneficial impact of exercise was mitigated by depression symptoms.

Conclusion:

Smokers with asthma have more insomnia, and this relationship may be mediated

by anxiety. Further, people with asthma who experience depression symptoms are less likely to

benefit from physical exercise as a method to enhance sleep quality. Our findings would suggest

that helping smokers to manage their anxiety and depression through behavioral methods may

reduce their insomnia symptoms, and enable them to engage in other health-enhancing pursuits,

such as physical exercise.
Publisher
Dove Medical press

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