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Int J Food Sci Nutr. 2017 May;68(3):265-277. doi: 10.1080/09637486.2016.1239700. Epub 2016 Oct 6.

Salt and obesity: a systematic review and meta-analysis of observational studies.

Author information

1
a Food Security Research Center , Isfahan University of Medical Sciences , Isfahan , Iran.
2
b Department of Community Nutrition, School of Nutrition and Food Science , Isfahan University of Medical Sciences , Isfahan , Iran.
3
c Students' Research Committee , Isfahan University of Medical Sciences , Isfahan , Iran.
4
d Department of International Health , John Hopkins School of Public Health , Baltimore , MD USA.
5
e Diabetes Research Center , Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences , Tehran , Iran.
6
f Department of Community Nutrition, School of Nutritional Sciences and Dietetics , Tehran University of Medical Sciences , Tehran , Iran.

Abstract

BACKGROUND:

Existing research has investigated the association between sodium intake and obesity. We aim to conduct a systematic review and meta-analysis of reported evidence regarding the association between sodium intake and obesity.

METHODS:

Multiple electronic databases (PubMed, Scopus, and Google Scholar) were searched for observational studies published until August 2016. A systematic literature review identified 11 cohort and 21 cross-sectional studies.

RESULT:

Among the 32 studies identified in the systematic literature search, only 18 cross-sectional reports had sufficient data to be included in the meta-analysis. Higher sodium consumption was associated with greater BMI (weighed mean difference (WMD) = 1.24 kg/m2, 95%CI: 0.80, 1.67; I2 =98.4%; p < .0001), and higher sodium intake was associated with 4.75 cm (95%CI: 3.25, 6.25; 90.8%; p <.0001) greater waist circumference (WC).

CONCLUSION:

The present meta-analysis suggests that sodium consumption was associated with greater BMI and WC.

KEYWORDS:

Salt; abdominal obesity; body mass index; obesity; waist circumference

PMID:
27706955
DOI:
10.1080/09637486.2016.1239700
[Indexed for MEDLINE]

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