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Sleep duration and overweight in European children : is the association modified by geographic region?

(2011) SLEEP. 34(7). p.885-890
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Abstract
Study Objectives: To investigate differences and a possible effect modification by geographical region in the association between sleep duration and overweight. Design: Cross-sectional. Setting: Primary schools and preschools in 8 European countries. Participants: 7867 children aged 2 to 9 years. Interventions: Not applicable. Measurements: Nocturnal sleep duration was assessed as part of a parental 24-h recall. Height and weight were measured by standardized procedures across centers. Data on personal, social, environmental and behavioral factors were collected using a standardized parental questionnaire. Results: Sleep duration differed (P < 0.001) between European regions and normal vs. overweight children. A dose-dependent inverse association between sleep duration and overweight could be seen, with crude odds ratios ranging from 1.73 (99% CI 1.33; 2.25) for sleeping between 10 and 11 h to 3.81 (99% CI 2.85; 5.09) for sleeping less than 9 h (reference category > 11 h). This persisted after adjustment, but remained significant only for sleeping less than 9 h per night (north: OR = 1.70; 99% CI 1.13; 2.58 vs. south: OR = 2.84; 99% CI 1.57; 5.12) if stratified by region. No effect modification by region could be found, but adjustment for region accounted for changes in the effect estimate for sleeping less than 9 h (OR = 2.22; 99% CI 1.64; 3.02). The association was stronger in school children than in preschool children. Conclusion: Geographic region and related aspects-even if they do not seem to modify the association between sleep and overweight-should in any case be taken in consideration as a confounding factor on this association.
Keywords
IDEFICS, cross-sectional, preschool children, school children, Epidemiological study, BODY-MASS INDEX, CHILDHOOD OVERWEIGHT, RISK-FACTORS, OBESITY, ADOLESCENTS, AGE, CONSEQUENCES, DETERMINANTS, METAANALYSIS, ENVIRONMENT

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Citation

Please use this url to cite or link to this publication:

Chicago
Hense, Sabrina, Hermann Pohlabeln, Stefaan De Henauw, Gabriele Eiben, Dénes Molnar, Luis A Moreno, Gianvincenzo Barba, Charalampos Hadjigeorgiou, Toomas Veidebaum, and Wolfgang Ahrens. 2011. “Sleep Duration and Overweight in European Children : Is the Association Modified by Geographic Region?” Sleep 34 (7): 885–890.
APA
Hense, Sabrina, Pohlabeln, H., De Henauw, S., Eiben, G., Molnar, D., Moreno, L. A., Barba, G., et al. (2011). Sleep duration and overweight in European children : is the association modified by geographic region? SLEEP, 34(7), 885–890.
Vancouver
1.
Hense S, Pohlabeln H, De Henauw S, Eiben G, Molnar D, Moreno LA, et al. Sleep duration and overweight in European children : is the association modified by geographic region? SLEEP. 2011;34(7):885–90.
MLA
Hense, Sabrina, Hermann Pohlabeln, Stefaan De Henauw, et al. “Sleep Duration and Overweight in European Children : Is the Association Modified by Geographic Region?” SLEEP 34.7 (2011): 885–890. Print.
@article{2975491,
  abstract     = {Study Objectives: To investigate differences and a possible effect modification by geographical region in the association between sleep duration and overweight. 
Design: Cross-sectional. 
Setting: Primary schools and preschools in 8 European countries. 
Participants: 7867 children aged 2 to 9 years. 
Interventions: Not applicable. 
Measurements: Nocturnal sleep duration was assessed as part of a parental 24-h recall. Height and weight were measured by standardized procedures across centers. Data on personal, social, environmental and behavioral factors were collected using a standardized parental questionnaire. 
Results: Sleep duration differed (P {\textlangle} 0.001) between European regions and normal vs. overweight children. A dose-dependent inverse association between sleep duration and overweight could be seen, with crude odds ratios ranging from 1.73 (99\% CI 1.33; 2.25) for sleeping between 10 and 11 h to 3.81 (99\% CI 2.85; 5.09) for sleeping less than 9 h (reference category {\textrangle} 11 h). This persisted after adjustment, but remained significant only for sleeping less than 9 h per night (north: OR = 1.70; 99\% CI 1.13; 2.58 vs. south: OR = 2.84; 99\% CI 1.57; 5.12) if stratified by region. No effect modification by region could be found, but adjustment for region accounted for changes in the effect estimate for sleeping less than 9 h (OR = 2.22; 99\% CI 1.64; 3.02). The association was stronger in school children than in preschool children. 
Conclusion: Geographic region and related aspects-even if they do not seem to modify the association between sleep and overweight-should in any case be taken in consideration as a confounding factor on this association.},
  author       = {Hense, Sabrina and Pohlabeln, Hermann and De Henauw, Stefaan and Eiben, Gabriele and Molnar, D{\'e}nes and Moreno, Luis A and Barba, Gianvincenzo and Hadjigeorgiou, Charalampos and Veidebaum, Toomas and Ahrens, Wolfgang},
  issn         = {0161-8105},
  journal      = {SLEEP},
  language     = {eng},
  number       = {7},
  pages        = {885--890},
  title        = {Sleep duration and overweight in European children : is the association modified by geographic region?},
  url          = {http://dx.doi.org/10.5665/SLEEP.1120},
  volume       = {34},
  year         = {2011},
}

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