Association of Urinary Sodium and Potassium Excretion with Blood Pressure
The New England Journal of Medicine, ISSN: 0028-4793, Vol: 371, Issue: 7, Page: 601-611
2014
- 701Citations
- 820Captures
- 148Mentions
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Metrics Details
- Citations701
- Citation Indexes684
- 684
- CrossRef323
- Policy Citations17
- Policy Citation17
- Captures820
- Readers820
- 820
- Mentions148
- News Mentions141
- News141
- Blog Mentions6
- Blog6
- References1
- Wikipedia1
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Article Description
Higher levels of sodium intake are reported to be associated with higher blood pressure. Whether this relationship varies according to levels of sodium or potassium intake and in different populations is unknown. We studied 102,216 adults from 18 countries. Estimates of 24-hour sodium and potassium excretion were made from a single fasting morning urine specimen and were used as surrogates for intake. We assessed the relationship between electrolyte excretion and blood pressure, as measured with an automated device. Regression analyses showed increments of 2.11 mm Hg in systolic blood pressure and 0.78 mm Hg in diastolic blood pressure for each 1-g increment in estimated sodium excretion. The slope of this association was steeper with higher sodium intake (an increment of 2.58 mm Hg in systolic blood pressure per gram for sodium excretion >5 g per day, 1.74 mm Hg per gram for 3 to 5 g per day, and 0.74 mm Hg per gram for <3 g per day; P<0.001 for interaction). The slope of association was steeper for persons with hypertension (2.49 mm Hg per gram) than for those without hypertension (1.30 mm Hg per gram, P<0.001 for interaction) and was steeper with increased age (2.97 mm Hg per gram at >55 years of age, 2.43 mm Hg per gram at 45 to 55 years of age, and 1.96 mm Hg per gram at <45 years of age; P<0.001 for interaction). Potassium excretion was inversely associated with systolic blood pressure, with a steeper slope of association for persons with hypertension than for those without it (P<0.001) and a steeper slope with increased age (P<0.001). In this study, the association of estimated intake of sodium and potassium, as determined from measurements of excretion of these cations, with blood pressure was nonlinear and was most pronounced in persons consuming high-sodium diets, persons with hypertension, and older persons. (Funded by the Heart and Stroke Foundation of Ontario and others.) In a large study in 18 countries, sodium and potassium intake were estimated from urine samples and correlated with blood pressure. The correlations were nonlinear and were most pronounced among people with high sodium intake, those with hypertension, and older persons. Hypertension affects 1 billion people and is considered to be a leading cause of death, stroke, myocardial infarction, congestive heart failure, and chronic renal impairment. 1–4 Sodium intake is reported to be a modifiable determinant of hypertension. 5,6 The International Study of Salt and Blood Pressure (INTERSALT), 7 but not another large study, 8 showed a modest association between higher levels of sodium intake and higher blood pressure. However, INTERSALT was not large enough to determine whether the association varied according to region, participant characteristics, or levels of sodium or potassium intake. Substantially larger studies are needed to assess the shape of. . .
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0028479314665904; http://dx.doi.org/10.1056/nejmoa1311989; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84906089603&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/25119606; http://www.nejm.org/doi/10.1056/NEJMoa1311989; http://www.nejm.org/doi/pdf/10.1056/NEJMoa1311989; http://dx.doi.org/10.1056/NEJMoa1311989; http://www.nejm.org/doi/abs/10.1056/NEJMoa1311989; http://www.nejm.org/doi/full/10.1056/NEJMoa1311989; http://europepmc.org/abstract/med/25119606
New England Journal of Medicine (NEJM/MMS)
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