Prevalência de inadequação da ingestão de nutrientes entre adolescentes do município de São Paulo / Prevalence of inadequate nutrient intake among adolescents from São Paulo-Brazil

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Introduction: The adolescence stands out as a high demand stage of nutrients. Nonetheless, food practices of this group often have been characterized as having high consumption of saturated fat and poor in nutrient-rich foods. Objective: To estimate the prevalence of inadequate nutrient intake and to calculates the variance components of energy and nutrient intake in adolescents from Sao Paulo, Brazil. Methods: This is a cross-sectional study from a representative sample of adolescents living in Sao Paulo, carried out on 2003. It was collected one 24-hour recall (24hr) for each subject (n=525) and also information about socioeconomic status and anthropometry. The intake variability measurement was performed using two replicates of 24hr in a subsample of this population, during 2007 and 2008. The usual nutrient intake was estimated using PC-SIDE software, that use the method developed at Iowa State University. The EAR cut-point method was chosen to calculate prevalence of inadequate nutrient intake between sexes and between familiar income per capita (FIPC) and parental educational levels, nutritional status and alcohol consumption. The groups were compared by proportions test. Contribution of the day of week and month of year in total variance were estimated using random effect models. It were calculated within- to between-person variance ratio (VR) and the number of replicates required to estimate habitual nutrient and energy intake in adolescents. Results: The highest prevalence of inadequate nutrient intake were regarding to vitamin E (99% e 99%), magnesium (89% e 84%), vitamin A (78% e 71%), vitamin C (79% e 73%, p<0.05) and phosphorus (49% e 71%, p<0.05), for male and female respectively. The proportion of individuals with calcium intake above recommended value was less than 1%. The prevalence of inadequate intake of vitamins A, C, B6 and B12, phosphorus and riboflavin is higher in lower FIPC and parental educational levels (p<0.05). The variance component analyses appointed out to unexpressive contribution (less than 8%) of the day of week and month of year to total variance. The VRs ranged from 1.15 for calcium to 7.31 for vitamin E. The number of replicates needed to estimate habitual nutrient intake ranged according to nutrient. It is approximately 15 for male and 8 for female.

ASSUNTO(S)

adolescentes nutrient ingestão habitual variabilidade da dieta habitual intake intake variability adolescence nutrientes

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