Journal
PEDIATRICS
Volume 133, Issue 6, Pages 1013-1022Publisher
AMER ACAD PEDIATRICS
DOI: 10.1542/peds.2013-3065
Keywords
sleep curtailment; adiposity; fat mass index; BMI; obesity; early childhood
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Funding
- National Cancer Institute's Centers for Transdisciplinary Research on Energetics and Cancer (TREC) [U54CA116847]
- Eunice Kennedy Shriver National Institute of Child Health and Human Development [R37HD034568]
- National Institutes of Health (NIH)
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OBJECTIVES: To examine the extent to which chronic sleep curtailment from infancy to mid-childhood is associated with total and central adiposity. METHODS: We studied 1046 children participating in a prospective cohort study. At age 6 months and yearly from age 1 to 7 years, mothers reported their children's sleep duration in a usual 24-hour period. The main exposure was a sleep curtailment score from age 6 months to 7 years. The range of the total score was 0 to 13, where 0 indicated the maximal sleep curtailment and 13 indicated never having curtailed sleep. Outcomes in mid-childhood were BMI z score, dual X-ray absorptiometry total and trunk fat mass index (kg/m(2)), and waist and hip circumferences (cm). RESULTS: The mean (SD) sleep score was 10.2 (2.7); 4.4% scored a 0 to 4, indicating multiple exposures to sleep curtailment between age 6 months to 7 years, 12.3% scored 5 to 7, 14.1% scored 8 to 9, 28.8% scored 10 to 11, and 40.3% scored 12 to 13. In multivariable models, children who had a sleep score of 0 to 4 had a BMI z score that was 0.48 U (95% confidence interval, 0.13 to 0.83) higher than those who had a sleep score of 12 to 13. We observed similar associations of higher total and trunk fat mass index and waist and hip circumferences, and higher odds of obesity (odds ratio, 2.62; 95% confidence interval, 0.99 to 6.97) among children who had a score of 0 to 4 vs 12 to 13. CONCLUSIONS: Chronic sleep curtailment from infancy to school age was associated with higher overall and central adiposity in midchildhood.
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