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首页> 外文期刊>Sao Paulo Medical Journal >Sodium and potassium intake estimated using two methods in the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil)
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Sodium and potassium intake estimated using two methods in the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil)

机译：巴西成人健康纵向研究（ELSA-Brasil）中使用两种方法估算的钠和钾摄入量

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CONTEXT AND OBJECTIVE: Sodium and potassium intake from different food sources is an important issue regarding cardiovascular physiology. Epidemiological assessment of the intake of these electrolytes intake is done through food frequency questionnaires or urinary excretion measurements. Our aim was to compare these methods using a sample of Brazilian civil servants. DESIGN AND SETTING: Cross-sectional baseline evaluation from the Brazilian Longitudinal Study of Adult Health. METHODS: Sodium and potassium intake was obtained using two methods: a semi-quantitative questionnaire including 114 food items; and overnight 12-hour urinary excretion measurement. Sodium and potassium estimates obtained through the questionnaire were adjusted for energy intake using the residual method. Urinary excretion measurements were considered valid if they met three adequacy criteria: collection time, volume and total creatinine excretion. Mean nutrients were estimated, and Spearman correlations were calculated. Sodium and potassium intake was categorized into quintiles, and weighted kappa coefficients and percentage agreement were calculated. The significance level for all tests was 0.05. RESULTS: Data from 15,105 participants were analyzed, and significant differences between mean intakes of sodium (questionnaire: 4.5 ?± 1.7 g; urine: 4.2 ?± 2.1 g) and potassium (questionnaire: 4.7 ?± 1.8 g; urine: 2.4 ?± 1 g) were found. Weak agreement was found for sodium (K = 0.18) and potassium (K = 0.16). The percentage disagreement between methods ranged from 41.8 to 44.5%, while exact concordance ranged from 22.1% to 23.9%. CONCLUSIONS: The agreement between the food frequency questionnaire and urinary excretion measurements for assessment of sodium and potassium intakes was modest.
机译：语境和目的：不同食物来源的钠和钾摄入量是有关心血管生理的重要问题。这些电解质摄入量的流行病学评估是通过食物频率问卷调查或尿液排泄测量完成的。我们的目的是使用巴西公务员的样本比较这些方法。设计与设置：来自巴西成人健康纵向研究的横断面基线评估。方法：采用两种方法获取钠和钾的摄入量：半定量问卷，其中包含114种食物;和过夜的12小时尿液排泄测量。通过问卷调查获得的钠和钾估计值使用残差法调整了能量摄入。如果尿液排泄物测量符合三个适当标准，则认为尿液排泄物是有效的：收集时间，体积和总肌酐排泄量。估计平均养分，并计算Spearman相关性。钠和钾的摄入量分为五分位数，并且计算了加权κ系数和百分比一致性。所有测试的显着性水平为0.05。结果：分析了来自15105名参与者的数据，钠（问卷调查：4.5？±1.7 g;尿液：4.2±±2.1 g）和钾（问卷调查：4.7±±1.8 g;尿液：2.4±±）的平均摄入量之间存在显着差异发现1克）。发现钠（K = 0.18）和钾（K = 0.16）的一致性较弱。两种方法之间的不一致百分比范围为41.8至44.5％，而确切的一致性范围为22.1％至23.9％。结论：食物频率调查表和尿排泄测量值之间的钠和钾摄入量评估之间的一致性不高。

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