Multiple measurements of the urinary sodium-to-potassium ratio strongly related home hypertension: TMM Cohort Study

Mana Kogure, Takumi Hirata, Naoki Nakaya, Naho Tsuchiya, Tomohiro Nakamura, Akira Narita, Ken Miyagawa, Hiroshi Koshimizu, Taku Obara, Hirohito Metoki, Akira Uruno, Masahiro Kikuya, Junichi Sugawara, Shinichi Kuriyama, Ichiro Tsuji, Shigeo Kure, Atsushi Hozawa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Previous studies have reported a positive association between the urinary sodium-to-potassium (Na/K) ratio and hypertension, and multiple measurements of the casual urinary Na/K ratio are more strongly correlated with the 24-h urinary Na/K ratio than a single measurement. Multiple measurements of the urinary Na/K ratio might be more strongly associated with hypertension. We aimed to determine the association between multiple measurements of the casual urinary Na/K ratio and home hypertension compared with a single measurement. A population-based cross-sectional study was performed in Miyagi Prefecture, Japan. Subjects were over 20 years old and participated in the Tohoku Medical Megabank Project Cohort Study. We targeted 3273 subjects who borrowed home blood pressure (HBP) monitors and urinary Na/K ratio monitors for 10 consecutive days. The association between the urinary Na/K ratio and home hypertension (HBP ≥ 135/85 mmHg or under treatment for hypertension) was examined using multiple logistic regression models. To compare the prediction of home hypertension using multiple measurements with that using a single measurement, we calculated the area under the receiver operating characteristic curve (AUROC). Multiple measurements of the urinary Na/K ratio strongly related to home hypertension were better than 1 or 2 days of measurement (adjusted odds ratio of home hypertension per unit increase in urinary Na/K ratio over 6 days: 1.13–1.15). The AUROC of the urinary Na/K ratio measurement for home hypertension was stable after 5 days (AUROC = 0.779). In conclusion, multiple measurements of the urinary Na/K ratio are strongly related to home hypertension. This finding suggests that multiple measurements of the urinary Na/K ratio are useful for evaluating home hypertension.

Original languageEnglish
Pages (from-to)62-71
Number of pages10
JournalHypertension Research
Volume43
Issue number1
DOIs
Publication statusPublished - 2020 Jan 1

Keywords

  • Home hypertension
  • Multiple measurements
  • TMM Cohort Study
  • Urinary Na/K ratio

ASJC Scopus subject areas

  • Internal Medicine
  • Physiology
  • Cardiology and Cardiovascular Medicine

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