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Revista de Saúde Pública
versão impressa ISSN 0034-8910
MORIMOTO, Juliana Masami; MARCHIONI, Dirce Maria Lobo; CESAR, Chester Luiz Galvão e FISBERG, Regina Mara. Within-person variance for adjusting nutrient distribution in epidemiological studies. Rev. Saúde Pública [online]. 2011, vol.45, n.3, pp. 621-625. ISSN 0034-8910. http://dx.doi.org/10.1590/S0034-89102011000300022.
The objective of the study was to present the within-person variance component for adjusting nutrient distribution in adults and elderly people. The data used were from a population-based survey with a representative sample (n = 511) of individuals aged 19 years and over in the municipality of São Paulo, Southeastern Brazil, conducted in 2007. The within-person variance component was obtained using the Iowa State University method. Differences in within-person variance components were observed for some nutrients according to gender. These values should be used to adjust nutrient intake distributions, because lack of adjustment may result in biased data analysis and interpretation.
Palavras-chave : Data Interpretation, Statistical; Nutrition Surveys; Nutrition Assessment; Within-person variance.