Database of Variance Ratios of Nutrient Intakes from Publications and Reanalyzed Datasets

Abstract

Ratios of within- and between-individual variation in nutrient intakes were compiled from publications or reports and from reanalyses of existing datasets. These ratios can potentially be used as external adjustment factors in analyses of nutrient intake data from studies that only collected one 24-hour dietary recall or food record per individual, in order to account for the proportion of total variance in nutrient intakes attributable to within-individual variation in population usual intake distributions. Careful consideration of the comparability of study characteristics and analytical approaches between the study from which a candidate external ratio is derived and study it will be used for is advised. See provided references for additional information on the original studies