Associations between sleep duration and insulin resistance in European children and adolescents considering the mediating role of abdominal obesity

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IDEFICS and I. Family Consortia , Thumann , B F , Michels , N , Felső , R , Kaprio , J & Börnhorst , C 2020 , ' Associations between sleep duration and insulin resistance in European children and adolescents considering the mediating role of abdominal obesity ' , PLoS One , vol. 15 , no. 6 , e0235049 . https://doi.org/10.1371/journal.pone.0235049

Title: Associations between sleep duration and insulin resistance in European children and adolescents considering the mediating role of abdominal obesity
Author: Thumann, Barbara F.; Michels, Nathalie; Felső, Regina; Hunsberger, Monica; Kaprio, Jaakko; Moreno, Luis A.; Siani, Alfonso; Tornaritis, Michael; Veidebaum, Toomas; De Henauw, Stefaan; Ahrens, Wolfgang; Börnhorst, Claudia
Contributor: University of Helsinki, Institute for Molecular Medicine Finland
Date: 2020-06-30
Number of pages: 19
Belongs to series: PLoS One
ISSN: 1932-6203
URI: http://hdl.handle.net/10138/318072
Abstract: Background Short sleep duration has been suggested to lead to insulin resistance both directly by altering glucose metabolism and indirectly through obesity. This study aims to investigate associations between nocturnal sleep duration and insulin resistance considering abdominal obesity as a mediator. Methods We analysed data of 3 900 children aged 2–15 years participating in the second (2009/10) and third (2013/14) examination wave of the European IDEFICS/I.Family study (hereafter referred to as baseline and follow-up). Information on nocturnal sleep duration was collected by questionnaires and age-standardised (SLEEP z-score). The homeostasis model assessment (HOMA) was calculated from fasting insulin and fasting glucose obtained from blood samples; waist circumference (WAIST) was measured with an inelastic tape. HOMA and WAIST were used as indicators for insulin resistance and abdominal obesity, respectively, and transformed to age- and sex-specific z-scores. Cross-sectional and longitudinal associations between SLEEP z-score and HOMA z-score were investigated based on a path model considering WAIST z-score as a mediator adjusting for relevant confounders. Results Cross-sectionally, baseline SLEEP z-score was negatively associated with baseline WAIST z-score (unstandardised effect estimate -0.120, 95% confidence interval [-0.167; -0.073]). We observed no direct effect of baseline SLEEP z-score on baseline HOMA z-score but a negative indirect effect through baseline WAIST z-score (-0.042 [-0.058; -0.025]). Longitudinally, there was no direct effect of baseline SLEEP z-score on HOMA z-score at follow-up but a negative indirect effect through both baseline WAIST z-score and WAIST z-score at follow-up (-0.028 [-0.040; -0.016]). Conclusions Our results do not support the hypothesis of an association between short sleep duration and insulin resistance independent of abdominal obesity. However, longer sleep duration may exert short and long term beneficial effects on insulin resistance through its beneficial effects on abdominal obesity.
Subject: 3121 Internal medicine
CHILDHOOD OBESITY
CARDIOMETABOLIC RISK
REFERENCE VALUES
SERUM-INSULIN
OVERWEIGHT
INDEXES
GLUCOSE
HEALTH
VALIDATION
SECRETION
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