title: Within-person variance for adjusting nutrient distribution in epidemiological studies.
abstract: 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.
authors.affiliation: Programa de Pós-Graduação em Nutrição em Saúde Pública, Faculdade de Saúde Pública, Universidade de São Paulo, SP, Brasil.
authors.forename: Juliana Masami
authors.initials: JM
authors.lastname: Morimoto
authors.forename: Dirce Maria Lobo
authors.initials: DM
authors.lastname: Marchioni
authors.forename: Chester Luiz Galvão
authors.initials: CL
authors.lastname: Cesar
authors.forename: Regina Mara
authors.initials: RM
authors.lastname: Fisberg
mesh_terms: D000328:Adult; D000368:Aged; D001938:Brazil; D015930:Diet Records; D002149:Energy Intake; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009749:Nutrition Surveys; D009751:Nutritional Requirements; D012737:Sex Factors; D012959:Socioeconomic Factors