01/05/2018 Medicine
DOI: 10.1093/EURPUB/CKY048.039 SemanticScholar ID: 25283381 MAG: 2803080964

Sleep Duration and Adiposity in Early Childhood: Evidence for Bidirectional Associations from the Born in Bradford Study.

Publication Summary

STUDY OBJECTIVES To examine independent associations of sleep duration with total and abdominal adiposity, and the bidirectionality of these associations, in a young bi-ethnic sample of children from a disadvantaged location. METHODS Child sleep duration (h/day) was parent-reported by questionnaire and indices of total (body weight, body mass index, percent body fat (%BF), sum of skinfolds) and abdominal adiposity (waist circumference) were measured using standard anthropometric procedures at approximately 12, 18, 24, and 36 months of age in 1,338 children (58% South Asian; 42% White). Mixed effects models were used to quantify independent associations (expressed as standardised β-coefficients (95% confidence interval (CI)) of sleep duration with adiposity indices using data from all four time-points. Factors considered for adjustment in models included basic demographics, pregnancy and birth characteristics, and lifestyle behaviours. RESULTS With the exception of the sum of skinfolds, sleep duration was inversely and independently associated with indices of total and abdominal adiposity in South Asian children. For example, one standard deviation (SD) higher sleep duration was associated with reduced %BF by -0.029 (95% CI: -0.053, -0.0043) SDs. Higher adiposity was also independently associated with shorter sleep duration in South Asian children (for example, %BF: β= -0.10 (-0.16, -0.028) SDs). There were no significant associations in White children. CONCLUSIONS Associations between sleep duration and adiposity are bidirectional and independent among South Asian children from a disadvantaged location. The results highlight the importance of considering adiposity as both a determinant of decreased sleep and a potential consequence.

CAER Authors

Avatar Image for Sally Barber

Dr. Sally Barber

Bradford Institute for Health Research - Lead for Physical Activity Research

Avatar Image for Rosie McEachan

Prof. Rosie McEachan

Bradford Institute for Health Research - Born in Bradford Director

Avatar Image for John Wright

Prof. John Wright

Bradford Institute for Health Research - Chief Investigator Born in Bradford

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