Abstract #2144

Association of physical activity and screen time with DXA- and MRI-based body composition in adolescents, a population-based study

Tong Wu¹, Junwen Yang-Huang², Meike Vernooij¹, María Rodriguez‑Ayllon³, Vincent Jaddoe⁴, Hein Raat², Stefan Klein¹, and Edwin Oei¹

¹Department of Radiology and Nuclear Medicine, Erasmus MC, Rotterdam, Netherlands, ²Department of Public Health, Erasmus MC, Rotterdam, Netherlands, ³Department of Epidemiology, Erasmus MC, Rotterdam, Netherlands, ⁴Department of Pediatrics, Erasmus MC, Rotterdam, Netherlands

Synopsis

Keywords: Adolescents, Body, Body compositionThis study is embedded in the Generation R Study, a population-based prospective cohort study in the Netherlands. At 13 years, whole-body Dixon MRI was performed. A previously presented Competitive Dense Fully Convolutional Network (CDFNet) was retrained and used to quantify the abdominal subcutaneous and visceral fat. We found a higher physical activity and lower screen time are associated with lower levels of MRI-based abdominal visceral obesity in adolescents. Therefore, promoting physical activity and reducing screen time should be one of the goals of lifestyle intervention programs for tackling the childhood obesity.

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