Drinking water salinity and risk of hypertension: A systematic review and meta-analysis

Mohammad Radwanur Rahman Talukder, Shannon Rutherford, Cunrui Huang, Dung Phung, Mohammad Zahirul Islam, Cordia Chu

Research output: Contribution to journalReview articlepeer-review

Abstract

We summarized epidemiological studies assessing sodium in drinking water and changes in blood pressure or hypertension published in English from 1960 to 2015 from PubMed, Scopus, and Web of Science. We extracted data on blood pressure level or prevalence of hypertension and calculated pooled estimates using an inverse variance weighted random-effects model. The pooled standardized mean difference (SMD) in 7 studies (12 data sets) comparing the low and high water sodium exposure groups for systolic blood pressure (SBP) was 0.08 (95% CI, −0.17 to 0.34) and for diastolic blood pressure (DBP) was 0.23 (95% CI, 0.09–0.36). Of the 3 studies that assessed the association between high water sodium and odds of hypertension, 2 recent studies showed consistent findings of higher risk of hypertension. Our systematic review suggests an association between water sodium and human blood pressure (more consistently for DBP) but remain inconclusive because of the small number of studies (largely in young populations) and the cross-sectional design and methodological drawbacks. In the context of climate-change-related sea level rise and increasing saltwater intrusion into drinking water sources, further research is urgently warranted to investigate and guide intervention in this increasingly widespread problem.

Original languageEnglish
Pages (from-to)126-138
Number of pages13
JournalArchives of Environmental and Occupational Health
Volume72
Issue number3
DOIs
Publication statusPublished - 4 May 2017
Externally publishedYes

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