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

Fletcher, Elly A. , Carson, Valerie, McNaughton, Sarah A. , Dunstan, David W. , Healy, Genevieve N. and Salmon, Jo (2017) Does diet mediate associations of volume and bouts of sedentary time with cardiometabolic health indicators in adolescents?. Obesity, 25 3: 591-599. doi:10.1002/oby.21750


Author Fletcher, Elly A.
Carson, Valerie
McNaughton, Sarah A.
Dunstan, David W.
Healy, Genevieve N.
Salmon, Jo
Title Does diet mediate associations of volume and bouts of sedentary time with cardiometabolic health indicators in adolescents?
Journal name Obesity   Check publisher's open access policy
ISSN 1930-739X
1930-7381
Publication date 2017-03-01
Sub-type Article (original research)
DOI 10.1002/oby.21750
Open Access Status DOI
Volume 25
Issue 3
Start page 591
End page 599
Total pages 9
Place of publication Hoboken, NJ, United States
Publisher Wiley-Blackwell Publishing
Collection year 2018
Language eng
Formatted abstract
Objective: Examine the mediating role of diet in the relationship between volume and duration of sedentary time with cardiometabolic health in adolescents.

Methods: 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.

Results: 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.

Conclusions: 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.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Public Health Publications
 
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