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Sleep Duration and Overweight in European Children: Is the Association Modified by Geographic Region?
Department of Epidemiological Methods and Etiologic Research, Bremen Institute for Prevention Research and Social Medicine (BIPS), Germany.
Bremen Inst Prevent Res & Social Med BIPS, Dept Epidemiol Methods & Etiol Res, D-28359 Bremen, Germany.;Bremen Inst Prevent Res & Social Med BIPS, Dept Biometry & Data Management, D-28359 Bremen, Germany.
Univ Ghent, Dept Publ Health, Dept Movement & Sport Sci, Fac Med & Hlth Sci, B-9000 Ghent, Belgium.
Univ Goteborg, Sahlgranska Sch Publ Hlth & Community Med, Gothenburg, Sweden.ORCID iD: 0000-0002-4397-3721
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2011 (English)In: Sleep, ISSN 0161-8105, E-ISSN 1550-9109, Vol. 34, no 7, p. 885-890Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
AMER ACAD SLEEP MEDICINE , 2011. Vol. 34, no 7, p. 885-890
Keyword [en]
Epidemiological study, school children, preschool children, cross-sectional, IDEFICS
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
URN: urn:nbn:se:his:diva-14466DOI: 10.5665/SLEEP.1120ISI: 000292926500016PubMedID: 21731138Scopus ID: 2-s2.0-79959986140OAI: oai:DiVA.org:his-14466DiVA, id: diva2:1157812
Note

Group Author(s): IDEFICS Consortium

Available from: 2017-11-16 Created: 2017-11-16 Last updated: 2017-11-27Bibliographically approved

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Eiben, GabrieleAhrens, Wolfgang

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