Page: 56
Volume 28, Issue 3(201) 2018
The validity of spot urine estimated sodium excretion among adult Vietnamese
Author: Tran Quoc Bao, Paul NJensen, Tran Thi Thanh Huong, Annette LFitzpatrick, Ali HMokdad, James PLoGerfo, Bernadette Thomas, Truong Le Van Ngoc and Susan R Heckbert
The gold standard method for estimating salt intake in population-based studies is 24-hour urine collection; however, sample collection is challenging. While spot urine is a practical alternative, little is known about its validity in resource-limited settings. The purpose of this analysis was to evaluate the validity of spot urine based estimates of daily sodium excretion compared with 24-hour urine collection measurements in Vietnam. Mid-morning spot urine samples and 24-hour urine collections were obtained in 2010 from a sample of adult Vietnamese. We estimated daily sodium excretion from spot urine samples and the correlation between the two measures was assessed using Pearson correlation coefficients and Bland-Altman plots. The analysis included 146 individuals 25-64 years of age (mean age: 44 years). Daily sodium excretion estimates from mid-morning spot urine samples were moderately correlated with the amount of sodium in 24-hour urine collections (ρ = 0.34-0.35). The correlation was higher for women than for men. Compared with the gold standard (mean Na: 188 mmol/day; 11g salt/day), Tanaka estimates were slightly lower (165 mmol/day) while Kawasaki provided higher estimates (216 mmol/day). Spot urine estimates correctly identified ≥98% of participants who exceeded the World Health Organization’s recommended limit of 85-100mmol of sodium per day. Spot urine samples may provide a useful tool for estimating salt consumption and identifying targets for salt reduction interventions in settings where 24-hour urine collections are not feasible
sodium chloride, dietary, table salt, urine
8. Tran Quoc Bao.pdf
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