The relationship between sodium in drinking water and blood pressure was examined in 348 schoolchildren aged 7.7 to 11.7 years. They were born and living in three areas with different levels of sodium in the public drinking water. Sodium content of the water was either long-term low, long-term high, or short-term high. The three communities are closely comparable according to demographic characteristics. The mean values of systolic and diastolic blood pressure were higher in the high sodium areas. After adjustment for dissimilarities in distributions of weight, height, pulse rate, age, family history of hypertension, and time of blood pressure measurement, these differences remained constant, ranging from 1.8 to 4.0 mm Hg. Girls and boys showed essentially the same differences. Mean 24-hour sodium excretion was somewhat higher in the long-term low area; no differences were found in sodium-creatinine ratio. The regression coefficients between sodium excretion and blood pressure were not significant. The findings from this retrospective follow-up study support the hypothesis that sodium intake influences blood pressure. The association seems to be of a relatively short-term nature, as no differences in blood pressure levels were found between the long-term and short-term high areas.
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机译：在348名7.7至11.7岁的小学生中检查了饮用水中钠与血压之间的关系。他们出生和生活在三个地区，这些地区的公共饮用水中钠含量不同。水的钠含量是长期较低，长期较高或短期较高。根据人口特征，这三个社区具有可比性。高钠区的收缩压和舒张压平均值较高。调整体重，身高，脉搏率，年龄，高血压家族史和血压测量时间分布的差异后，这些差异保持恒定，范围为1.8至4.0 mm Hg。女孩和男孩表现出基本相同的差异。在长期的低洼地区，平均24小时钠排泄量较高；钠-肌酐比例无差异。钠排泄与血压之间的回归系数不显着。这项回顾性随访研究的结果支持以下假设：钠摄入量会影响血压。这种关联似乎是相对短期的，因为在长期和短期高压区域之间未发现血压水平的差异。
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