Korean J Fam Med.  2017 Jul;38(4):199-205. 10.4082/kjfm.2017.38.4.199.

The Association between Urinary Sodium Excretion and Metabolic Syndrome in Korean Adults from the 2010–2011 Korean National Health and Nutrition Examination Survey

Affiliations
  • 1Department of Family Medicine, Ewha Womans University School of Medicine, Seoul, Korea.
  • 2Department of Family Medicine, Bundang CHA Medical Center, CHA University, Seongnam, Korea. fmewha@naver.com

Abstract

BACKGROUND
The sodium intake of Koreans was higher than that recommended by the World Health Organization. Urinary sodium, which is correlated with sodium intake, can be easily calculated by the Tanaka's equation. This study aimed to evaluate the association between urinary sodium and metabolic syndrome in Korean adults using the 2010-2011 Korean National Health and Nutrition Examination Survey (KNHANES).
METHODS
A total of 5,870 participants from the 2010-2011 KNHANES were included in this study. Twenty-four hour urinary sodium was calculated by the Tanaka's equation using spot urine. Participants were divided into tertiles based on urinary sodium levels. The association between urinary sodium and metabolic syndrome was analyzed using multivariate logistic regression analysis.
RESULTS
The odds ratios (ORs) and 95% confidence intervals (CIs) of metabolic syndrome for the 2nd and 3rd tertile of urinary sodium levels was 1.51 (1.16-1.97) and 1.56 (1.23-1.97) compared to the lowest tertile of urinary sodium in men. The ORs and 95% CIs of metabolic syndrome in women were 1.20 (0.95-1.51) for the 2nd tertile and 2.16 (1.68-2.78) for the 3rd tertile. These associations remained statistically significant, even after adjusting for multiple covariates such as age, education, regular exercise, smoking, and alcohol consumption.
CONCLUSION
These findings indicate that urinary sodium is significantly associated with metabolic syndrome in Korean adults.

Keyword

Urine; Sodium; Metabolic Syndrome; Korea

MeSH Terms

Adult*
Alcohol Drinking
Education
Female
Humans
Korea
Logistic Models
Male
Nutrition Surveys*
Odds Ratio
Smoke
Smoking
Sodium*
World Health Organization
Smoke
Sodium
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