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Duration of sleep at 3 years of age is associated with fat and fat-free mass at 4 years of age: the Southampton Women's Survey

Duration of sleep at 3 years of age is associated with fat and fat-free mass at 4 years of age: the Southampton Women's Survey
Duration of sleep at 3 years of age is associated with fat and fat-free mass at 4 years of age: the Southampton Women's Survey
Many studies have shown that shorter sleep duration in childhood is associated with higher body mass index (BMI), and have proposed that it is due to an effect of sleep on adiposity. There is little evidence about the association of sleep with fat‐free mass. This study examined the association between child's sleep duration at age 3 years and fat and fat‐free mass at 4 years of age in a prospective cohort study of 302 boys and 285 girls. Study participants were taking part in the Southampton Women's Survey, a longitudinal study of mothers and children from preconception onwards. Total sleep duration at age 3 years was derived from parental report of night sleep and nap duration. Body composition was assessed by Dual‐energy X‐ray Absorptiometry (DXA) at 4 years. Mean total sleep duration was 11.5 hours. In linear regression analyses, adjusted for potentially confounding factors (maternal educational attainment, prepregnancy BMI, smoking during pregnancy, child's gestational age at birth, age at DXA, sex, age last breastfed, dietary quality at 3 years, TV watching and hours actively on the move and parental social class), shorter sleep in hours was associated with higher BMI (kg/m2) [β: −0.2340, 95% confidence interval (CI): −0.373 to −0.096], a greater fat mass index (kg) (β: −0.1182, 95% CI: −0.218 to −0.018) and a greater fat‐free mass index (kg) (β: −0.100, 95% CI: −0.185 to −0.015). Previous research suggested that the association between shorter sleep and higher body mass index is due to an effect on adiposity. Our findings are novel, suggesting that the relationship between sleep and BMI is also determined by an effect on muscle.
sleep, child, body composition, adiposity, muscle
0962-1105
412-418
Baird, J.
f4bf2039-6118-436f-ab69-df8b4d17f824
Hill, C.
867cd0a0-dabc-4152-b4bf-8e9fbc0edf8d
Harvey, N.C.
ce487fb4-d360-4aac-9d17-9466d6cba145
Crozier, S.
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Robinson, S.
ba591c98-4380-456a-be8a-c452f992b69b
Godfrey, K.
0931701e-fe2c-44b5-8f0d-ec5c7477a6fd
Cooper, C.
e05f5612-b493-4273-9b71-9e0ce32bdad6
Inskip, H.
5fb4470a-9379-49b2-a533-9da8e61058b7
Baird, J.
f4bf2039-6118-436f-ab69-df8b4d17f824
Hill, C.
867cd0a0-dabc-4152-b4bf-8e9fbc0edf8d
Harvey, N.C.
ce487fb4-d360-4aac-9d17-9466d6cba145
Crozier, S.
1f39648f-d527-497f-bb40-319f487a0782
Robinson, S.
ba591c98-4380-456a-be8a-c452f992b69b
Godfrey, K.
0931701e-fe2c-44b5-8f0d-ec5c7477a6fd
Cooper, C.
e05f5612-b493-4273-9b71-9e0ce32bdad6
Inskip, H.
5fb4470a-9379-49b2-a533-9da8e61058b7

Baird, J., Hill, C., Harvey, N.C., Crozier, S., Robinson, S., Godfrey, K., Cooper, C. and Inskip, H. (2016) Duration of sleep at 3 years of age is associated with fat and fat-free mass at 4 years of age: the Southampton Women's Survey. Journal of Sleep Research, 25 (4), 412-418. (doi:10.1111/jsr.12389|).

Record type: Article

Abstract

Many studies have shown that shorter sleep duration in childhood is associated with higher body mass index (BMI), and have proposed that it is due to an effect of sleep on adiposity. There is little evidence about the association of sleep with fat‐free mass. This study examined the association between child's sleep duration at age 3 years and fat and fat‐free mass at 4 years of age in a prospective cohort study of 302 boys and 285 girls. Study participants were taking part in the Southampton Women's Survey, a longitudinal study of mothers and children from preconception onwards. Total sleep duration at age 3 years was derived from parental report of night sleep and nap duration. Body composition was assessed by Dual‐energy X‐ray Absorptiometry (DXA) at 4 years. Mean total sleep duration was 11.5 hours. In linear regression analyses, adjusted for potentially confounding factors (maternal educational attainment, prepregnancy BMI, smoking during pregnancy, child's gestational age at birth, age at DXA, sex, age last breastfed, dietary quality at 3 years, TV watching and hours actively on the move and parental social class), shorter sleep in hours was associated with higher BMI (kg/m2) [β: −0.2340, 95% confidence interval (CI): −0.373 to −0.096], a greater fat mass index (kg) (β: −0.1182, 95% CI: −0.218 to −0.018) and a greater fat‐free mass index (kg) (β: −0.100, 95% CI: −0.185 to −0.015). Previous research suggested that the association between shorter sleep and higher body mass index is due to an effect on adiposity. Our findings are novel, suggesting that the relationship between sleep and BMI is also determined by an effect on muscle.

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Sleep and body composition J Sleep Research revised following peer review Nov 2015 track accepted.docx - Accepted Manuscript
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Accepted/In Press date: 12 December 2015
e-pub ahead of print date: 23 February 2016
Published date: August 2016
Keywords: sleep, child, body composition, adiposity, muscle
Organisations: Faculty of Medicine

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Local EPrints ID: 385317
URI: http://eprints.soton.ac.uk/id/eprint/385317
ISSN: 0962-1105
PURE UUID: d7752cfc-bb1f-44ec-9666-beb747ded371
ORCID for J. Baird: ORCID iD orcid.org/0000-0002-4039-4361
ORCID for C. Hill: ORCID iD orcid.org/0000-0003-2372-5904
ORCID for N.C. Harvey: ORCID iD orcid.org/0000-0002-8194-2512
ORCID for S. Robinson: ORCID iD orcid.org/0000-0003-1766-7269
ORCID for K. Godfrey: ORCID iD orcid.org/0000-0002-4643-0618
ORCID for C. Cooper: ORCID iD orcid.org/0000-0003-3510-0709
ORCID for H. Inskip: ORCID iD orcid.org/0000-0001-8897-1749

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Date deposited: 19 Jan 2016 09:11
Last modified: 30 Apr 2020 00:29

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Contributors

Author: J. Baird ORCID iD
Author: C. Hill ORCID iD
Author: N.C. Harvey ORCID iD
Author: S. Crozier
Author: S. Robinson ORCID iD
Author: K. Godfrey ORCID iD
Author: C. Cooper ORCID iD
Author: H. Inskip ORCID iD

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