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Correlation between blood pressure responses to dietary sodium and potassium intervention in a Chinese population.

Abstract：

BACKGROUND:Blood pressure (BP) responses to dietary sodium and potassium intake vary among individuals. We examined the correlation between BP responses to dietary low-sodium, high-sodium, and potassium supplementation interventions in a feeding study. METHODS:A total of 1,906 Chinese aged > or = 16 years participated in the dietary intervention that included a 7-day low-salt intervention (51.3 mmol/day), a 7-day high-salt intervention (307.8 mmol/day), and a 7-day high-salt plus potassium supplementation (60 mmol/day) intervention. BP was measured nine times during the 3-day baseline observation and during the last 3 days of each intervention phase using a random-zero sphygmomanometer. RESULTS:The correlation coefficients (95% confidence intervals (CIs)) of the BP responses to low-sodium and high-sodium interventions were -0.47 (-0.51 to -0.44), -0.47 (-0.50 to -0.43), and -0.45 (-0.49 to -0.42) for systolic BP (SBP), diastolic BP (DBP), and mean arterial pressure (MAP), respectively (all P < 0.0001). The correlation coefficients (95% CI) of the BP responses to high-sodium intervention and potassium supplementation were -0.52 (-0.56 to -0.49), -0.48 (-0.52 to 0.45), and -0.52 (-0.55 to -0.48) for SBP, DBP, and MAP, respectively (all P < 0.0001). The kappa coefficients were moderate, varying from 0.28 to 0.34, between BP responses to low-sodium and high-sodium interventions (all P < 0.0001). CONCLUSIONS:These results indicate there is a moderate correlation between BP responses to low-sodium and to high-sodium interventions, and BP responses to high-sodium intervention and potassium supplementation. Furthermore, our study suggests that individuals who were more sensitive to high-sodium diet might benefit more from a low-sodium and/or high-potassium intervention aimed at lowering BP levels.

journal_name

Am J Hypertens

journal_title

American journal of hypertension

authors

Zhao Q,Gu D,Chen J,Bazzano LA,Rao DC,Hixson JE,Jaquish CE,Cao J,Chen J,Li J,Rice T,He J

doi

10.1038/ajh.2009.176

subject

Has Abstract

pub_date

2009-12-01 00:00:00

pages

1281-6

issue

eissn

0895-7061

issn

1941-7225

pii

ajh2009176

journal_volume

pub_type

临床试验,杂志文章,多中心研究

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Correlation between blood pressure responses to dietary sodium and potassium intervention in a Chinese population.