Sources of variation of energy and nutrient intake among adolescents in São Paulo, Brazil

Author(s)

Verly Junior, Eliseu ; Fisberg, Regina Mara ; Galvao Cesar, Chester Luis ; Lobo Marchioni, Dirce Maria ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Nutr, Fac Saude Publ, BR-01246904 Sao Paulo - Brazil

• Document type: Journal article
• Source: Cadernos de Saúde Pública; v. 26, n. 11, p. 2129-2137, NOV 2010.
• Web of Science Citations: 5

Abstract

The aim of the current study was to describe the sources of variation of energy and nutrient intake and to calculate the number of repetitions of diet measurements to estimate usual intake in adolescents from São Paulo, Brazil. Data was collected using 24-hour dietary recalls (24hR) in 273 adolescents between 2007 and 2008. Individuals completed a repeat 24hR around two months later. The sources of variation were estimated using the random effect model. Variance ratios (within-person to between-person variance ratio) and the number of repetitions of 24hR to estimate usual intake were calculated. The principal source of variation was due to within-person variance. The contribution of day of week and month of year was less than 8%. Variations ranged from 1.15 for calcium to 7.31 for vitamin E. The number of 24hR repeats required to estimate usual intake varied according to nutrient and gender, numbering 15 for males and 8 for females. (AU)

• FAPESP's process: 07/52119-0 - Evaluating the prevalence of inadequate nutrient intake among adolescents in the city of São Paulo
• Grantee: Eliseu Verly Junior
• Support Opportunities: Scholarships in Brazil - Master