Daily variation in food and nutrient intakes of Asian children in Sheffield
1994
Harbottle, L. | Duggan, M.B.
Weighed intake data from a 1 year cross-sectional nutritional survey of Indo-Asian children (4-40 months of age), in Sheffield, were analysed with respect to the day-to-day variability of energy and selected nutrient intakes. 117 children (i.e. 53% of those approached) completed studies; this figure approximates one-quarter of the estimated target population. The between- and within-subject variability in dietary intakes was examined according to age group. For energy, the between-subject variability, measured by the coefficient of variation between subjects (CVb) rose from 26% at 4-<12 months to 36% in the 12-<24 month group. Within subject variation (CVw) for energy varied little between age groups (23-29%). Within-subject variability in protein and fat intakes showed a similar pattern to that of energy. However, the CVb for protein was maximal in the youngest group; it was lower than the CVw in the over 24 month group. Iron and vitamin C intakes were subject to much higher levels of within- and between-subject variation; the CVb for iron was maximal in the 12-<24m group. Although the within-person variation was demonstrably greater than that of Caucasian infants (A.E. Black et al., 1983, Hum. Nutr.: Appl. Nutr. 37A, 448-458), the between-person variation, as measured over a 1 year period, was also high and comparatively larger than the CVw. This resulted in surprisingly low estimates of the number of days needed to classify individuals within the population: 2-4 days for energy and fat, 1-6 days for protein and iron, and 2 days for vitamin C.
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