The reproducibility of a three-day dietary record

The reproducibility of a 3-day dietary record was investigated in 61 subjects including adults and children of both sexes. The subjects completed two records within an interval of 7 days. The agreement of the records was moderate to high for almost all nutrients, with the exception of retinol intake for which very low intraclass correlation coefficients were noted. Sex did not influence the reproducibility of nutritional intake measurement. However, children reported more stable intakes than adults. These results suggest that a 3-day dietary record provides reliable estimates of the intake of almost all nutrients, particularly in children.