Poster Topical Area: Nutritional Epidemiology
Location: Hall D
Poster Board Number: 802
Objectives: To compare the performance of the National Cancer Institute (NCI) method with that of the Multiple Source Method (MSM) for estimating usual energy and nutrient intakes of Hispanic/Latino adolescents.
Methods: Dietary data were obtained by two 24-hour dietary recalls (24HR), initially in-person and then by phone, in 1453 individuals aged 8-16y from the Hispanic Community Health Study/Study of Latino Youth (SOL-Youth), a population-based study of Hispanic/Latino adolescents living in the USA. The NCI method and the MSM were used to estimate usual intake of energy, macronutrients (total carbohydrate, protein, and total fat), omega-3 fatty acids, cholesterol, minerals (calcium, iron, and potassium), vitamins (A, B12, C, and D), added sugar, and caffeine. For both methods, the probability of consumption for these components was assumed to be one, and the covariates in the usual intake models were age, sex, day of the week of the 24HR (weekend/weekday), self-perception about intake amounts (more vs. same or less than usual amount), and interview sequence of the 24HR (first or second). The distribution of the usual intake was estimated using the two-day-mean, the MSM and the NCI method. The difference between the methods was compared in different percentiles of the distribution as well as the correlation between them. Data were analyzed using SAS 9.3. Results: For all components, except omega-3 fatty acids, MSM estimation was closer to two-day mean estimation than NCI estimation, but with lower standard deviation than the mean. The NCI method presented the lowest standard deviation values, except for caffeine, with higher values in the lowest percentiles and lower values in the higher percentiles. The correlation between the three methods was higher than 0.85 for all the components (p<0.0001), except for omega-3 (0.60 for NCI versus mean, and 0.74 versus MSM), and for caffeine (0.83 for NCI versus mean).
Conclusions: Both MSM and NCI methods provided good estimates of the usual intake distribution using 24HR, and they better represented the usual intake compared with two-day mean, correcting for measurement error and intra-individual variability. The smallest precision was observed in the extremes percentiles of the distribution, and for nutrients seldom-consumed or with asymmetric distribution.
Funding Source: •National Heart, Lung and Blood Institute (K01-HL120951, N01-HC65233, N01-HC65234, N01-HC65235, N01-HC65236, N01-HC65237) •National Institute on Minority Health and Health Disparities •National Institute on Deafness and Other Communication Disorders •National Institute of Dental and Craniofacial Research •National Institute of Diabetes and Digestive and Kidney Diseases •National Institute of Neurological Disorders and Stroke •NIH Institution-Office of Dietary Supplements •São Paulo Municipal Health Department •National Council for Scientific and Technological Development - CNPQ •São Paulo Research Foundation – FAPESP.
School of Public Health - University of Sao Paulo
Santo Andre, Sao Paulo, Brazil