Childhood Sleep Duration and Associated Demographic Characteristics in an English Cohort

Blair, Peter S; Humphreys, Joanna S.; Gringras, Paul; Taheri, Shahrad; Scott, Nicola; Emond, Alan; Henderson, John; Fleming, Peter

doi:10.5665/sleep.1694

Cited by 172 publications

(223 citation statements)

References 30 publications

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“…It has been shown in previous studies that BMI and sleep duration differ by gender, 3,20 race, 3,20 and socioeconomic status. 20,21 Therefore, these demographic variables were included in the current study as covariates.…”

Section: Covariatesmentioning

confidence: 90%

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Sleep Duration and Adolescent Obesity

Mitchell¹,

Rodriguez

Schmitz³

et al. 2013

Pediatrics

142

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WHAT'S KNOWN ON THIS SUBJECT: Short sleep may be an adolescent obesity risk factor, but most evidence is from crosssectional studies. Three longitudinal studies have investigated the association between sleep duration and adolescent obesity, finding mixed results.WHAT THIS STUDY ADDS: Shorter sleep was associated with increases in BMI from age 14 to 18, especially at the upper tail of the BMI distribution. Increasing daily sleep to 10 hours per day could help to prevent adolescent obesity. abstract OBJECTIVES: Short sleep has been associated with adolescent obesity. Most studies used a cross-sectional design and modeled BMI categories. We sought to determine if sleep duration was associated with BMI distribution changes from age 14 to 18.METHODS: Adolescents were recruited from suburban high schools in Philadelphia when entering ninth grade (n = 1390) and were followedup every 6 months through 12th grade. Height and weight were selfreported, and BMIs were calculated (kg/m 2 ). Hours of sleep were self-reported. Quantile regression was used to model the 10th, 25th, 50th, 75th, and 90th BMI percentiles as dependent variables; study wave and sleep were the main predictors.RESULTS: BMI increased from age 14 to 18, with the largest increase observed at the 90th BMI percentile. Each additional hour of sleep was associated with decreases in BMI at the 10th (-0.04; 95% confidence interval [CI]: -0.11, 0.03), 25th , and 90th (-0.27; 95% CI: -0.45, -0.09) BMI percentiles. The strength of the association was stronger at the upper tail of the BMI distribution. Increasing sleep from 7.5 to 10.0 hours per day at age 18 predicted a reduction in the proportion of adolescents .25 kg/m 2 by 4%.

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Section: Covariatesmentioning

confidence: 90%

“…20,21 Therefore, these demographic variables were included in the current study as covariates. Maternal education was used as a marker of socioeconomic status.…”

Section: Covariatesmentioning

confidence: 99%

Sleep Duration and Adolescent Obesity

Mitchell¹,

Rodriguez

Schmitz³

et al. 2013

Pediatrics

142

View full text Add to dashboard Cite

show abstract

“…5 and extrapolated to fit the current study's responses available to this variable. All variables were self-reported.…”

Section: Outcome Definition and Assessmentmentioning

confidence: 99%

“…3 In fact, between 20% and 30% of children experience sleep problems during the first 3 years of life. 4 Clear clinical recommendations for optimal sleep duration in infancy and early childhood do not exist currently, 5,6 however, at around 18 months of age, children sleep 11.3 hours per night and 1.5 hours during the day, on average. 6 Sleeping <11 hours per night substantially increases the risk of obesity in children under 5 years of age, 7 therefore reflecting a sleep level that does not promote health.…”

mentioning

confidence: 99%

“…[11][12][13] Low socio-economic status, non-Caucasian ethnic group, higher maternal age, maternal stress and/or depression, prematurity, low birth weight, care outside the home, TV/screen viewing especially before going to sleep, and male gender have been found to be factors associated with shorter night sleep duration in school-aged children and toddlers. 5,[14][15][16] Moreover, parental behaviour at bedtime (e.g., parental presence until sleep onset, feeding), especially among toddlers, presents an additional important risk factor for fragmented sleep 17 and consequently shorter sleep duration. 18 Few studies report on sleep problems among a representative sample of Canadian children; 19 with the majority examining the link between poor sleep and childhood obesity, [20][21][22][23][24] and hyperactivity.…”

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confidence: 99%

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Factors associated with shorter night-time sleep in toddlers: The Survey of Young Canadians

Costanian

Abdullah

Sawh

et al. 2017

Can J Public Health

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OBJECTIVES: Adequate sleep in childhood is important for healthy development. No information exists on the predictors of night-time sleep among toddlers in Canada. The aim of this study was to determine the prevalence of and to identify factors associated with sleeping <11 consecutive hours per night among children aged 1-2 years in Canada.METHODS: Data from the cross sectional Survey of Young Canadians (SYC) 2010 were used. The biological mother reported on toddlers' sleep duration at night. Based on cut-off values used in previous studies, shorter night-time sleep was defined as sleeping <11 hours per night. Multivariable logistic regression was conducted to identify the associations between socio-demographic, maternal, sleep and child-related variables with shorter sleep at night. RESULTS:Analysis of 3675 toddlers revealed that 57% slept <11 hours per night. Results of the regression analysis showed that being from an immigrant family was significantly associated with shorter night-time sleep. Being from a higher income household, having a mother aged between 25 and 34 years at the time of the survey, and napping ≥2 hours during the day were significantly related to sleeping ≥11 hours per night. Other socio-demographic, maternal and child-related variables were not associated with night-time sleep.CONCLUSION: This was the first population-based, nationally representative study to examine factors related to shorter night-time sleep in Canadian toddlers. Socio-demographic factors and nap duration were associated with night-time sleep duration. More adequate early childhood sleep hygiene awareness efforts are recommended, especially in vulnerable populations.KEY WORDS: Children; sleep duration; factors; Canada La traduction du résumé se trouve à la fin de l'article.

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How Much Sleep Is “Normal” in Children and Adolescents?

Jenni¹

2013

JAMA Pediatr

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Childhood Sleep Duration and Associated Demographic Characteristics in an English Cohort

Abstract: Given the wide natural variation of sleep in the childhood population, any recommendations on optimal sleep duration at any age must take into account considerable individual variability.

Cited by 172 publications

References 30 publications

Sleep Duration and Adolescent Obesity

Sleep Duration and Adolescent Obesity

Factors associated with shorter night-time sleep in toddlers: The Survey of Young Canadians

How Much Sleep Is “Normal” in Children and Adolescents?

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