Estimation of the salt intake distribution of Dutch kidney transplant recipients using 24-h urinary sodium excretion: the potential of external within-person variance

There is growing interest in assessing a population–s prevalence of inadequate nutrient intake using biomarkers. However, within-person variation is generally ignored because repeated data collections are considered costly and burdensome. The study aimed to show the importance of estimating, from repeated 24-h urine collections, a population–s habitual salt intake and to explore the potential of using the ratio of within-person variance to total...