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Does diet mediate associations of volume and bouts of sedentary time with cardiometabolic health indicators in adolescents?

journal contribution
posted on 01.03.2017, 00:00 authored by Eloise Fletcher, V Carson, Sarah McNaughtonSarah McNaughton, David DunstanDavid Dunstan, G N Healy, Jo SalmonJo Salmon
Examine the mediating role of diet in the relationship between volume and duration of sedentary time with cardiometabolic health in adolescents. Adolescents (12-19 years) participating in the 2003/04 and 2005/06 U.S. National Health and Nutrition Examination Survey (NHANES) were examined. Cardiometabolic health indicators were body mass index z-scores (zBMI) (n = 1,797) and metabolic syndrome (MetS) (n = 812). An ActiGraph hip-worn accelerometer was used to derive total sedentary time and usual sedentary bout duration. Dietary intake was assessed using two 24-hour dietary recalls. Mediation analyses were conducted to examine five dietary mediators [total energy intake, discretionary foods, sugar-sweetened beverages (SSB), fruits and vegetables, and dietary quality] of the relationship between total sedentary time and usual sedentary bout duration with zBMI and MetS. Total sedentary time was inversely associated with zBMI (β = -1.33; 95% CI -2.53 to -0.13) but attenuated after adjusting for moderate-to-vigorous physical activity. No significant associations were observed between usual sedentary bout duration with zBMI or either sedentary measure with MetS. None of the five dietary variables mediated any of the relationships examined. Further studies are needed to explore associations of specific time periods (e.g., after school) and bout durations with both cardiometabolic health indicators and dietary behaviors.

History

Journal

Obesity

Volume

25

Issue

3

Pagination

591 - 599

Publisher

Wiley-Blackwell

Location

London, Eng.

ISSN

1930-7381

eISSN

1930-739X

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2017, The Authors