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Nutrients 2016, 8(3), 166; doi:10.3390/nu8030166

Comparison of the ISU, NCI, MSM, and SPADE Methods for Estimating Usual Intake: A Simulation Study of Nutrients Consumed Daily

1
Post-Graduate Program in Epidemiology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre 90000-000, Brazil
2
Post-Graduate Program in Epidemiology and Department of Statistics—UFRGS, Porto Alegre 90000-000, Brazil
3
Department of Nutrition, Federal University of Paraná (UFPR), Curitiba 80000-000, Brazil
4
Netherlands National Institute for Public Health and the Environment, Bilthoven 3720, The Netherlands
*
Author to whom correspondence should be addressed.
Received: 5 December 2015 / Revised: 29 February 2016 / Accepted: 2 March 2016 / Published: 15 March 2016
(This article belongs to the Special Issue Assessment of Nutrient Intakes)
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Abstract

Various methods are available for estimating usual dietary intake distributions. Hence, there is a need for simulation studies to compare them. The methods Iowa State University (ISU), National Cancer Institute (NCI), Multiple Source Method (MSM) and Statistical Program to Assess Dietary Exposure (SPADE) were previously compared in another study, but some results were inconclusive due to the small number of replications used in the simulation. Seeking to overcome this limitation, the present study used 1000 simulated samples for 12 different scenarios to compare the accuracy of estimates yielded by the aforementioned methods. The focus is on scenarios that exhibited the most uncertainty in the conclusions of the mentioned study above, i.e., scenarios with small sample sizes, skewed intake distributions, and large ratios of the between- and within-person variances. Bias was used as a measure of accuracy. For scenarios with small sample sizes (n = 150), the ISU, MSM and SPADE methods generally achieved more accurate estimates than the NCI method, particularly for the 10th and 90th percentiles. The differences between methods became smaller with larger sample sizes (n = 300 and n = 500). With few exceptions, the methods were found to perform similarly. View Full-Text
Keywords: daily-consumed nutrients distribution; comparison; ISU; NCI; MSM; SPADE daily-consumed nutrients distribution; comparison; ISU; NCI; MSM; SPADE
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Laureano, G.H.C.; Torman, V.B.L.; Crispim, S.P.; Dekkers, A.L.M.; Camey, S.A. Comparison of the ISU, NCI, MSM, and SPADE Methods for Estimating Usual Intake: A Simulation Study of Nutrients Consumed Daily. Nutrients 2016, 8, 166.

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