Nonshared environmental influences on sleep quality: A study of monozygotic twin differences.

Barclay, Nicola L.; Eley, Thalia C.; Buysse, Daniel J.; Maughan, Barbara and Gregory, Alice M.. 2012. Nonshared environmental influences on sleep quality: A study of monozygotic twin differences. Behavior Genetics, 42, pp. 234-244. [Article]

[img] Text (Submitted version of 'Nonshared environmental influences on sleep quality: A study of monozygotic twin differences')
Barclay-MZ Diffs-Manuscript-0911-revision_NB_Final.doc - Submitted Version

Download (239kB)
[img]
Preview
Text
Barclay-MZ%20Diffs-Manuscript-0911-revision_NB_Final.pdf - Submitted Version

Download (99kB) | Preview

Abstract or Description

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 (b = 1.56, p\0.001) and relationship satisfaction for females (b = 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.

Item Type:

Article

Departments, Centres and Research Units:

Psychology

Dates:

DateEvent
2012Published

Item ID:

7010

Date Deposited:

06 Jul 2012 13:02

Last Modified:

29 Apr 2020 15:49

Peer Reviewed:

Yes, this version has been peer-reviewed.

URI:

http://research.gold.ac.uk/id/eprint/7010

View statistics for this item...

Edit Record Edit Record (login required)