2019 Volume 10 Issue 1 Pages 1_73-1_79
The present study aimed to estimate the usual dietary intake in the population of the Chiba prefecture using the one-day dietary survey of the Chiba Prefecture Health and Nutrition Survey 2015. Moreover, we examined the difference in the proportion of participants whose dietary intake less than or exceeded the Dietary Reference Intakes values between one-day intake and the estimated usual intake.
A non-consecutive two-day dietary survey was conducted in November 2016 in 70 households in the Chiba prefecture. The usual intake distributions of 22 nutrients were estimated by sex and age groups using the Best- Power method with the power exponent and the ratio of intra- and inter-individual variances from the two-day dietary survey.
The one-day intake distributions were larger than the usual intake distributions. The proportion of partici-pants whose dietary intake was less than or exceeded the Dietary Reference Intakes values of the one-day intake was under- or overestimated compared with the usual intake. Our findings suggest that it necessary to estimate the usual intake distribution to assess nutrient intakes when using the Dietary Reference Intakes.
