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  • Title: Association between blood pressure and dietary intakes of sodium and potassium among US adults using quantile regression analysis NHANES 2007-2014.
    Author: Li M, Yan S, Li X, Jiang S, Ma X, Zhao H, Li J, Sun C, Jin L, Yao Y, Li B.
    Journal: J Hum Hypertens; 2020 May; 34(5):346-354. PubMed ID: 31420581.
    Abstract:
    Hypertension has become a major public health challenge, and previous studies have observed associations between hypertension and sodium, potassium, and sodium to potassium ratio. However, little is known about how the whole continuum of blood pressure (BP) is related to dietary intake of sodium and potassium. This study aims to examine quantile-specific associations of blood pressure with dietary intake of sodium and potassium. It is based on national-level, cross sectional data for US adults aged ≥18 years from the National Health and Nutrition Examination Survey (NHANES) 2007-2014. A total of 11,095 eligible subjects were included in this study. Quantile regression (QR) models were used to investigate distributional effects in the dietary intake of sodium and potassium on blood pressure by adjusting the confounding factors. We observed some evidence indicating distributional effects of dietary intake of sodium and potassium on systolic blood pressure (SBP) and diastolic blood pressure (DBP). QR showed that the consumption of sodium was positively associated with SBP (P10) and DBP (P10) in males, and positively associated with DBP (P80-P90) alone in females. Intake of potassium was, however, negatively associated with SBP (P20-P30, P70-P80) in males, and also negatively associated with SBP (P10-P80) and DBP(P20-P50) in females. Sodium to potassium ratio was positively associated with SBP (P10-P50, P80) and DBP (P70-P90) in males, and was positively associated with SBP(P10-P70, P90) in females. QR models provided a more detailed view on associations of SBP and DBP with the dietary intake of sodium and potassium and uncovered the quantile-related patterns.
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