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Is it time for bed? Short sleep duration increases risk of obesity in Mexican American children.

ABSTRACT: Cross-sectional studies show that sleep is related to childhood obesity. We aimed to examine the longitudinal impact of sleep on the risk of obesity in Mexican American children.We evaluated 229 Mexican American 8-10-year-olds and their mothers at baseline and at 12- and 24-month follow-ups. Sleep duration and anthropometrics were collected. Age- and gender-specific body mass index (BMI) z-scores (BMIz) were calculated based on Centers for Disease Control and Prevention guidelines. Sleep duration was estimated using accelerometry. Children were also categorized as long or short sleepers, using the National Sleep Foundation's recommendation to define adequate sleep duration (10-11?h for 5-12-year-olds). Using linear regressions, we examined whether sleep duration predicted BMIz, waist-to-height ratio (WHtR), and weight gain at 24 months.Children were mostly short sleepers (82%). Children who slept less were more likely to have a higher BMIz, WHtR, and weight gain at the 24-month follow-up (??=?-0.07, P?=?0.01; ??=?-0.11, P?<0.01; and ??=?-0.14, P?=?0.02, respectively), after controlling for baseline weight status, child gender, maternal BMI, and occupation.In Mexican American children, shorter sleep duration at baseline was associated with increased weight status over 24 months.

SUBMITTER: Martinez SM

PROVIDER: S-EPMC4492433 | biostudies-literature | 2014 Dec

REPOSITORIES: biostudies-literature

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Is it time for bed? Short sleep duration increases risk of obesity in Mexican American children.

Martinez Suzanna M SM Tschann Jeanne M JM Greenspan Louise C LC Deardorff Julianna J Penilla Carlos C Flores Elena E Pasch Lauri A LA Gregorich Steve E SE Butte Nancy F NF

Sleep medicine 20140930 12

<h4>Objective</h4>Cross-sectional studies show that sleep is related to childhood obesity. We aimed to examine the longitudinal impact of sleep on the risk of obesity in Mexican American children.<h4>Design and methods</h4>We evaluated 229 Mexican American 8-10-year-olds and their mothers at baseline and at 12- and 24-month follow-ups. Sleep duration and anthropometrics were collected. Age- and gender-specific body mass index (BMI) z-scores (BMIz) were calculated based on Centers for Disease Con ...[more]

PMID: 25454984

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Project description:ObjectiveTo investigate the associations of sleep duration, wake-up time, bedtime, and childhood abdominal obesity, and to test whether there is a weekday/weekend difference and the potential modifying role of sex.MethodsThis cross-sectional study was based on the Students' Constitution and Health Survey and included 9559 students (4840 boys and 4719 girls) aged 7-18 years (7227 aged 7-12 years, 2332 aged 13-18 years). They were divided into two groups (control group and group with abdominal obesity). The physical measurements included children and youth body height, body weight, and waist circumference (WC). A parent-report questionnaire was used to collect the information about parent characteristics as well as lifestyle and sleep patterns (sleep duration, bedtime, and wake-up time of weekdays and weekends) of children and youth.ResultsThe prevalence of abdominal obesity was 30.57% and the percentages of sleep duration <9 hours/day, wake-up time before 07:00 am on weekdays and weekends, bedtime after 10:00 pm on weekends were significantly higher in the group with abdominal obesity. After adjusting for confounders, sleep duration <9 hours/day on weekends was inversely related to abdominal obesity in the overall subjects, regardless of their sex and age, while bedtime after 10:00 pm on weekends was inversely related to abdominal obesity only in the overall subjects, boys, and children aged 7-12 years. Logistic regression models in all subjects showed that shorter hours of weekends sleep duration were associated with greater risks of abdominal obesity, even after adjusting for all confounders, including wake-up time and bedtime. The adjusted odds ratios and 95% confidence intervals of abdominal obesity (with ≥10 hours/day as the reference group) for children with 9-10 hours/day, 8-9 hours/day, and <8 hours/day of weekend sleep duration were 1.23 (1.04-1.46), 1.59 (1.32-1.91) and 1.83 (1.42-2.36), respectively. Specifically, after stratification by sex and age, this phenomenon was only observed in boys and children aged 7-12 years.ConclusionsSleep duration and bedtime on weekends were independently associated with the risk of childhood abdominal obesity, particularly in boys and children aged 7-12 years.

Project description:ObjectivesCognitive impairment is a leading cause of disability worldwide, and cardiometabolic conditions are key contributors to its development. Short sleep is also a potential contributor to brain health; however, its role in predicting mortality remains poorly understood. We investigated whether objective short sleep duration increases the risk of all-cause mortality associated with coexisting cognitive impairment and cardiometabolic conditions, i.e., possible vascular cognitive impairment (VCI).DesignThis is a longitudinal study.SettingThis is a population-based, in-lab study.ParticipantsA total of 1,524 adults (aged 48.9±13.4 years, 53.4% women) from the Penn State Adult Cohort were included in the study.MeasurementsAll-cause mortality was estimated after 19.1±5.1 years of follow-up. Neuropsychological testing was performed to ascertain cognitive impairment. Clinical history and physical examination were performed to ascertain stage 2 hypertension, type 2 diabetes, heart disease, and stroke. Possible VCI was defined as the presence of any of these cardiometabolic conditions and cognitive impairment. In-lab, 8-hour polysomnography (PSG) was performed to ascertain short sleep duration (i.e., <6 hours).ResultsMultivariable-adjusted Cox proportional-hazard models showed that the risk of all-cause mortality associated with cardiometabolic conditions (n=864) and possible VCI (n=122) was significantly increased in those who slept <6 hours at baseline (hazards ratio [HR] = 1.79, 95% confidence interval [CI] = 1.28-2.51 and HR = 4.01, 95% CI = 2.66-6.05, respectively), while it was negligible in those who slept ?6 hours (HR = 1.44, 95% CI = 0.99-2.09 and HR = 1.41, 95% CI = 0.70-2.83, respectively).ConclusionsObjective short sleep duration predicts the mortality prognosis of adults with possible VCI. Sleep duration and cognition should be objectively evaluated in patients presenting with a cluster of cardiometabolic conditions and sleep and cognitive complaints. Short sleep is a useful risk factor in the prediction of adverse cardiometabolic and brain health outcomes.

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Is it time for bed? Short sleep duration increases risk of obesity in Mexican American children.

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Is it time for bed? Short sleep duration increases risk of obesity in Mexican American children.

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