Dataset Information

Sleep timing and longitudinal weight gain in 4- and 5-year-old children.

ABSTRACT:

Background and objective

Short night-time sleep duration is a possible factor contributing to childhood obesity. Our objective was to evaluate associations between sleep timing (including bedtime and waketime) and weight gain in 4- to 5-year-old children.

Methods

We used cross-sectional and longitudinal regression analyses of a large, nationally representative sample of children from the Early Childhood Longitudinal Study-Birth Cohort. Data regarding the timing and duration of weekday sleep were assessed via parent questionnaire. Short sleep duration, late bedtime and early waketime were defined as those greater than one standard deviation from the mean for the group.

Results

Using linear regression adjusted for confounders, sleep duration at 4 and 5 years and bedtime at 5 years were linked to body mass index (BMI) z-score (P < 0.001). Odds of obesity were higher at 4 years for children sleeping <9.44 h nightly (adjusted odds ratio 1.35, confidence interval 1.02-1.78, P < 0.05) and at 5 years for children going to bed at 9:00 pm or later (1.49, 1.16-1.45, P < 0.01) or waking before 6:30 am (1.23, 1.01-15.51, P < 0.05). Assessed longitudinally, both short sleep duration (P < 0.05) and later bedtime at 4 years (P < 0.01) were associated with increases in BMI z-score between 4 and 5 years.

Conclusions

Children with shorter night-time sleep durations and later bedtimes were more likely to be obese and to gain weight over time. Pediatricians should encourage families to place children to bed at earlier times to promote longer sleep duration as a potential means of controlling weight gain.

SUBMITTER: Scharf RJ

PROVIDER: S-EPMC5481722 | biostudies-literature | 2015 Apr

REPOSITORIES: biostudies-literature

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Publications

Sleep timing and longitudinal weight gain in 4- and 5-year-old children.

Scharf R J RJ DeBoer M D MD

Pediatric obesity 20140612 2

<h4>Background and objective</h4>Short night-time sleep duration is a possible factor contributing to childhood obesity. Our objective was to evaluate associations between sleep timing (including bedtime and waketime) and weight gain in 4- to 5-year-old children.<h4>Methods</h4>We used cross-sectional and longitudinal regression analyses of a large, nationally representative sample of children from the Early Childhood Longitudinal Study-Birth Cohort. Data regarding the timing and duration of wee ...[more]

PMID: 24919802

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Project description:BackgroundMidlife women have a higher risk of cardiometabolic disease than younger women, but the lifelong biological/lifestyle factors responsible for this increase are unclear.ObjectivesWe investigated whether pregnancy history is a risk factor for midlife overweight/obesity and evaluated potential hormonal mechanisms.MethodsThe Baltimore Midlife Women's Health Study, a prospective cohort, recruited 772 women aged 45-54 y. Women reported pregnancy characteristics via questionnaires, trained staff measured weight/height to calculate midlife BMI, and serum hormones were assessed by ELISA. Logistic regression models assessed associations of pregnancy history with risk of midlife overweight/obesity and BMI gain since age 18. We additionally explored whether associations differed by menopausal status, and whether midlife hormones mediated relationships of pregnancy history and midlife BMI.ResultsThese premenopausal or perimenopausal women were 66% Caucasian/White and 30% African American/Black, with a median of 2 live births (range: 0-11) and median age at first birth of 27 y (range: 12-46 y). Women with 0 and ?2 live births had lower odds of overweight/obesity than those with 1 birth (OR = 0.47; 95% CI: 0.23, 0.96; P = 0.04, and OR = 0.58; 95% CI: 0.35, 0.95; P = 0.03, respectively). Women with ?2 live births also had lower odds of BMI gain than those with 1 birth (OR = 0.66; 95% CI: 0.41, 1.06; P = 0.08). Furthermore, women who were older at their first birth had lower odds of overweight/obesity (OR = 0.96; 95% CI: 0.92, 1.00; P = 0.03) and BMI gain (OR = 0.97; 95% CI: 0.93, 1.00; P = 0.06). Number of pregnancies and age at last pregnancy were not associated with midlife overweight/obesity or BMI gain. Associations did not differ by menopausal status and were not explained by midlife hormones.ConclusionsEarlier childbirth and having 1 child increased women's risk of midlife overweight/obesity and BMI gain since age 18. Additional studies should focus on women's childbearing years as a critical determinant of midlife metabolic health.

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Dataset Information

Sleep timing and longitudinal weight gain in 4- and 5-year-old children.

Background and objective

Methods

Results

Conclusions

Publications

Sleep timing and longitudinal weight gain in 4- and 5-year-old children.

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