Yasutake Kenichiro, Sawano Kayoko, Shono Naoko, Tsuchihashi Takuya
Department of Health and Nutrition Sciences, Faculty of Health and Social Welfare Sciences, Nishikyushu University, Kanzaki, Japan.
Asia Pac J Clin Nutr. 2013;22(1):25-31. doi: 10.6133/apjcn.2013.22.1.03.
The purpose of this study was to investigate the relationship between salt intake and urinary salt excretion and to examine the validity of a self-monitoring device for estimating 24-h urinary salt excretion from overnight urine samples.
Twelve young, healthy female volunteers consumed test meals from days 1 to 14 and estimated urinary salt excretion on days 2-15 by using a self-monitoring device. The salt content of the test meals was as follows: 10 g (days 1-5), 6 g (days 6-8), 13 g (days 9-11), 6 g (day 12), 13 g (day 13), and 6 g (day 14).
The average 24-h urinary salt excretion (the ratio of urinary salt excretion to salt intake of the previous day) estimated from the overnight urine samples was as follows: 8.01±1.15 g (0.73±0.11) on days 2-6, 5.86±0.85 g (1.01±0.15) on days 7-9, 9.69±1.64 g (0.74±0.13) on days 10-12, 6.51±1.56 g (1.03±0.25) on day 13, 8.60±3.25 g (0.71±0.14) on day 14, and 6.28±1.31 (1.05±0.22) on day 15. Thus, the salt excretion/salt intake ratio was approximately 0.8 during the high-salt phase and 1.0 during the low-salt phase.
The estimation of 24-h urinary salt excretion from overnight urine samples by using a self-monitoring device is a reasonably valid method in this young and healthy female population for detecting daily changes in salt intake.
本研究旨在探讨盐摄入量与尿盐排泄之间的关系，并检验一种自我监测装置用于根据过夜尿样估算24小时尿盐排泄量的有效性。
12名年轻健康的女性志愿者在第1至14天食用测试餐，并在第2至15天使用自我监测装置估算尿盐排泄量。测试餐的盐含量如下：10克（第1至5天）、6克（第6至8天）、13克（第9至11天）、6克（第12天）、13克（第13天）和6克（第14天）。
根据过夜尿样估算的平均24小时尿盐排泄量（尿盐排泄量与前一天盐摄入量的比值）如下：第2至6天为8.01±1.15克（0.73±0.11），第7至9天为5.86±0.85克（1.01±0.15），第10至12天为9.69±1.64克（0.74±0.13），第13天为6.51±1.56克（1.03±0.25），第14天为8.60±3.25克（0.71±0.14），第15天为6.28±1.31（1.05±0.22）。因此，在高盐阶段，盐排泄量/盐摄入量的比值约为0.8，在低盐阶段约为1.0。
在这群年轻健康的女性人群中，使用自我监测装置根据过夜尿样估算24小时尿盐排泄量是一种合理有效的检测每日盐摄入量变化的方法。
