Luft F C, Miller J Z, Fineberg N S, Daugherty S A, Christian J C, Weinberger M H
Pediatrics. 1984 Mar;73(3):318-23.
To examine the utility of nocturnal urine collections in the estimation of dietary sodium intake in children, 29 families who agreed to lower their dietary sodium intake to less than 65 mEq/d were studied. A total of 58 adults and 95 children collected urine specimens weekly or biweekly before and after being instructed in a dietary sodium restriction regimen. Urine collections were fractionated into a diurnal and nocturnal portion. Sodium was measured directly, and estimated by measuring chloride excretion with a chloride titrator stick. Nocturnal chloride and 24-hour sodium excretion were highly correlated in adults (r = .75), and slightly less so (r = .56) in children. The slopes of the relationships were not different. Discriminant analysis showed that two or more chloride estimates permitted classification of both adults and children into the low sodium intake category with 100% accuracy, and into the normal sodium intake category with 75% accuracy. It was concluded that nocturnal chloride estimates are as useful in estimating compliance to a reduced sodium intake in children as in adults.
为了研究夜间尿液收集在评估儿童饮食钠摄入量中的作用，对29个同意将饮食钠摄入量降至每日65 mEq以下的家庭进行了研究。共有58名成年人和95名儿童在接受饮食钠限制方案指导前后，每周或每两周收集一次尿液样本。尿液收集被分为日间和夜间部分。直接测量钠含量，并通过用氯化物滴定棒测量氯化物排泄量来估算钠含量。夜间氯化物排泄量与24小时钠排泄量在成年人中高度相关（r = 0.75），在儿童中相关性稍低（r = 0.56）。两者关系的斜率没有差异。判别分析表明，两次或更多次氯化物估算可使成年人和儿童以100%的准确率被归类为低钠摄入类别，以75%的准确率被归类为正常钠摄入类别。研究得出结论，夜间氯化物估算在评估儿童降低钠摄入量的依从性方面与评估成年人一样有用。
