24-h urinary sodium excretion is associated with obesity in a cross-sectional sample of Australian schoolchildren

Grimes, Carley A., Riddell, Lynn J., Campbell, Karen J., He, Feng J. and Nowson, Caryl A. 2016, 24-h urinary sodium excretion is associated with obesity in a cross-sectional sample of Australian schoolchildren, British journal of nutrition, vol. 115, no. 6, pp. 1071-1079, doi: 10.1017/S0007114515005243.

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Title 24-h urinary sodium excretion is associated with obesity in a cross-sectional sample of Australian schoolchildren
Author(s) Grimes, Carley A.ORCID iD for Grimes, Carley A. orcid.org/0000-0002-9123-1888
Riddell, Lynn J.ORCID iD for Riddell, Lynn J. orcid.org/0000-0002-0688-2134
Campbell, Karen J.ORCID iD for Campbell, Karen J. orcid.org/0000-0002-4499-3396
He, Feng J.
Nowson, Caryl A.ORCID iD for Nowson, Caryl A. orcid.org/0000-0001-6586-7965
Journal name British journal of nutrition
Volume number 115
Issue number 6
Start page 1071
End page 1079
Total pages 9
Publisher Cambridge University Press
Place of publication Cambridge, Eng.
Publication date 2016-03
ISSN 1475-2662
Keyword(s) %BF percentage of body fat
EI energy intake
SES socio-economic status
SSB sugar-sweetened beverages
Sodium chloride
Science & Technology
Life Sciences & Biomedicine
Nutrition & Dietetics
Sodium, dietary
Sodium chloride, dietary
Summary Emerging evidence indicates that dietary Na may be linked to obesity; however it is unclear whether this relationship is independent of energy intake (EI). The aim of this study was to assess the association between Na intake and measures of adiposity, including BMI z score, weight category and waist:height ratio (WHtR), in a sample of Australian schoolchildren. This was a cross-sectional study of schoolchildren aged 4-12 years. Na intake was assessed via one 24-h urine collection. BMI was converted to age- and sex-specific z scores, and WHtR was used to define abdominal obesity. In children aged ≥8 years, EI was determined via one 24-h dietary recall. Of the 666 children with valid urine samples 55 % were male (average age 9·3 (sd 1·8) years). In adjusted models an additional 17 mmol/d of Na was associated with a 0·10 higher BMI z score (95 % CI 0·07, 0·13), a 23 % (OR 1·23; 95 % CI 1·16, 1·31) greater risk of being overweight/obese and a 15 % (OR 1·15; 95 % CI 1·09, 1·23) greater risk of being centrally obese. In the subsample of 8-12-year-old children (n 458), adjustment for EI did not markedly alter the associations between Na and adiposity outcomes. Using a robust measure of daily Na intake we found a positive association between Na intake and obesity risk in Australian schoolchildren, which could not be explained by total energy consumption. To determine whether this is a causal relationship, longitudinal studies, with high-quality measures of Na and EI, are required.
Language eng
DOI 10.1017/S0007114515005243
Field of Research 111199 Nutrition and Dietetics not elsewhere classified
0702 Animal Production
1111 Nutrition And Dietetics
0908 Food Sciences
Socio Economic Objective 920501 Child Health
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Cambridge University Press
Persistent URL http://hdl.handle.net/10536/DRO/DU:30081022

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