NDLI: Nonshared Environmental Influences on Sleep Quality: A Study of Monozygotic Twin Differences

Content Provider	Springer Nature Link
Author	Barclay, Nicola L. Eley, Thalia C. Buysse, Daniel J. Maughan, Barbara Gregory, Alice M.
Copyright Year	2011
Abstract	Research has consistently demonstrated that environmental influences are important for explaining the variability in sleep quality observed in the general population. Although there is substantial evidence assessing associations between sleep quality and a host of environmental variables, it is possible that their effects are mediated by genetic influence. A monozygotic twin differences design was used to assess the specific contribution of nonshared environmental influences on sleep quality, whilst controlling for genetic and shared environmental effects in a sample of 380 monozygotic twins (mean age 19.8 years, SD = 1.26, range = 18–22 years). Participants completed the Pittsburgh Sleep Quality Index and questionnaires assessing several candidate “environmental” measures. When controlling for genetic and shared environmental effects, within monozygotic twin-pair differences in sleep quality were associated with within monozygotic twin-pair differences in general health for males (β = 1.56, p < 0.001) and relationship satisfaction for females (β = 1.01, p < 0.05). For the remaining environmental measures the results suggest that these seemingly “environmental” influences are actually in part dependent on genetics and/or the shared environment. These findings give insight into how specific environments affect sleep and the possible mechanisms behind these associations.
Starting Page	234
Ending Page	244
Page Count	11
File Format	PDF
ISSN	00018244
Journal	Behavior Genetics
Volume Number	42
Issue Number	2
e-ISSN	15733297
Language	English
Publisher	Springer US
Publisher Date	2011-10-16
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Genetics Gene–environment correlation Monozygotic Nonshared environment Sleep Twins Public Health/Gesundheitswesen Health Psychology Clinical Psychology
Content Type	Text
Resource Type	Article
Subject	Genetics Ecology, Evolution, Behavior and Systematics Genetics (clinical)

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