Schneider, Melanie N.; Kovas, Yulia and Gregory, Alice M.. 2019. Dysfunctional beliefs about sleep and insomnia symptoms in early adulthood: A twin and sibling study. Journal of Sleep Research, 28(4), ISSN 0962-1105 [Article]

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Abstract or Description

This study examines the associations between dysfunctional belief about sleep (DBAS), its subtypes and insomnia symptoms and estimates the relative contribution of genetic and environmental influences to these variables and the associations between them. The data came from G1219, a twin/sibling study that comprises 862 individuals (aged 22–32 years, 34% male). The Insomnia Symptoms Questionnaire was used to measure insomnia symptoms and a 10‐item version of the Dysfunctional Beliefs and Attitudes about Sleep Scale was used to assess DBAS. A higher DBAS score was associated with more insomnia symptoms. Overall DBAS showed a mainly non‐shared environmental influence (86%). The genetic correlation between overall DBAS and insomnia symptoms was large but not significant, the shared environmental correlation was very small, negative and not significant, whereas a moderate, significant overlap in the non‐shared environmental influences was evident (non‐shared environmental correlation = 0.32). For the association between the subscales of DBAS and insomnia symptoms no significant overlap for genetic (weak to strong associations) or shared environmental factors (very weak negative to strong associations) was indicated. Most of the non‐shared environmental influences on the four variables were significantly moderately correlated (non‐shared environmental correlation = 0.24–0.46). These findings help to deepen our understanding of cognitive theories of insomnia by dissecting one of its crucial elements and illuminating the factors involved in its association with insomnia symptoms.

Item Type:	Article
Identification Number (DOI):	https://doi.org/10.1111/jsr.12834
Additional Information:	Waves 1-3 funded by the W T Grant Foundation, the University of London Central Research Fund and a Medical Research Council Training Fellowship (G81/343) and Career Development Award to Thalia C. Eley. Wave 4 supported by the Economic and Social Research Council (RES-000-22-2206) and the Institute of Social Psychiatry (06/07 – 11) to Alice M. Gregory. Wave 5 was supported by funding to Alice M. Gregory by the Department of Psychology, Goldsmiths University of London.
Keywords:	dysfunctional beliefs about sleep, environmental influence, genetic influence, insomnia, sleep, twins
Departments, Centres and Research Units:	Psychology
Dates:	Date Event 24 January 2019 Accepted 14 March 2019 Published Online 11 July 2019 Published
Item ID:	25683
Date Deposited:	30 Jan 2019 10:13
Last Modified:	11 Jun 2021 23:58
Peer Reviewed:	Yes, this version has been peer-reviewed.
URI:	https://research.gold.ac.uk/id/eprint/25683

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