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Sleep Med. 2014 May;15(5):536-40. doi: 10.1016/j.sleep.2014.01.005. Epub 2014 Feb 7.

Predictors of shorter sleep in early childhood.

Author information

1
Health Behaviour Research Centre, Department of Epidemiology and Public Health, University College London, Gower Street, London WC1E 6BT, UK.
2
Health Behaviour Research Centre, Department of Epidemiology and Public Health, University College London, Gower Street, London WC1E 6BT, UK. Electronic address: Abigail.fisher@ucl.ac.uk.

Abstract

OBJECTIVE:

The aim of this study was to identify socio-demographic and home environmental predictors of shorter sleep in early childhood, and to examine whether effects were mediated by the timing of bedtime or wake time.

METHODS:

Participants were from Gemini, a British birth cohort of twins, and included 1702 children; one randomly selected from each twin pair. Parents reported night-time sleep duration at an average age of 15.8 months (range 14-27 months) using a modified version of the Brief Infant Sleep Questionnaire. Multiple logistic regression models were used to identify predictors of shorter sleep for this study.

RESULTS:

Using a cut-off of <11 h a night, shorter sleep was reported in 14.1% of children. Lower maternal education, non-white ethnic background, being male, low birth weight, living in a home with >1 older child and watching >1 h of TV in the evening were independently associated with shorter sleep. Mediation analyses showed that associations between education, ethnicity, evening TV viewing and sleep were driven predominantly by later bedtimes, while sex differences were driven predominantly by earlier wake times in boys.

CONCLUSION:

In this sample, multiple environmental factors were associated with shorter sleep in young children, with several operating predominantly through later bedtime. An emphasis on the importance of an early and consistent bedtime could help promote healthy sleep and reduce inequalities in child health.

KEYWORDS:

Bedtime; Behaviour; Child; Predictors; Sleep; Wake time

PMID:
24726571
PMCID:
PMC4038745
DOI:
10.1016/j.sleep.2014.01.005
[Indexed for MEDLINE]
Free PMC Article

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