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      Dobras cutâneas e bioimpedância elétrica perna-perna na avaliação da composição corporal de crianças Translated title: Skinfold thicknesses and leg-to-leg bioimpedance for the assessment of body composition in children

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          Abstract

          OBJETIVO: Comparar os componentes da composição corporal, obtidos pela bioimpedância elétrica perna-perna e pela espessura das dobras cutâneas, em crianças. MÉTODOS: A composição corporal de 1 286 escolares (703 meninas e 538 meninos) entre 7 e 9 anos foi avaliada pelas dobras triciptal e subescapular e pela bioimpedância elétrica perna-perna (TANITA TBF-300ª). Para analisar a concordância entre o percentual de gordura corporal, a massa gorda e a massa magra obtidos pelos métodos, foram utilizados o coeficiente de correlação de Pearson (r) e o modelo de Bland-Altman. RESULTADOS: A correlação (r) foi alta e significante, respectivamente nas meninas e nos meninos, para o percentual de gordura corporal (0,77 e 0,89), para a massa gorda (0,93 e 0,94) e para a massa magra (0,92 e 0,89). O modelo de Bland-Altman também mostrou haver boa concordância entre os métodos, uma vez que poucos pontos, correspondentes às diferenças entre as medidas feitas pelos métodos, estavam fora do intervalo de confiança. CONCLUSÃO: Estes resultados demonstram que a técnica de bioimpedância elétrica perna-perna é comparável à técnica das dobras cutâneas para avaliar a composição corporal de escolares em estudos populacionais. Individualmente, a ampla variabilidade observada em algumas medidas sugere que a utilização da bioimpedância elétrica perna-perna ou das dobras cutâneas deve ser associada a outros indicadores na avaliação da composição corporal.

          Translated abstract

          OBJECTIVE: The objective of this study was to compare the components of body composition obtained by leg-to-leg bioimpedance and skinfold thickness measurements in children. METHODS: Triceps and subscapular skinfold thicknesses and TANITA TBF-300A leg-to-leg bioimpedance were used to determine the body composition of 1 286 schoolchildren (703 girls and 583 boys) aged 7 to 9 years. The Pearson's correlation coefficient (r) and Bland-Altman plot were used to analyze the agreement between the two methods. RESULTS: The two methods correlated strongly and significantly for girls´ and boys´ percentage of body fat (0.77 and 0.89, respectively), fat mass (0.93 and 0.94 respectively) and lean mass (0.92 and 0.89 respectively). The Bland-Altman plot also showed good agreement between the methods, since only a few points corresponding to the differences between the measurements obtained by the two methods were outside the confidence interval. CONCLUSION: These results show that both methods, triceps and subscapular skinfold thicknesses and leg-to-leg bioimpedance, can be used to asses the body composition of schoolchildren in population-based studies. Yet, the wide variability observed in some measurements suggests that either method should always be associated with other indicators to assess body composition.

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          Most cited references42

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          Development of a WHO growth reference for school-aged children and adolescents

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            Skinfold equations for estimation of body fatness in children and youth

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              Trends of obesity and underweight in older children and adolescents in the United States, Brazil, China, and Russia

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                rn
                Revista de Nutrição
                Rev. Nutr.
                Pontifícia Universidade Católica de Campinas (Campinas )
                1678-9865
                August 2009
                : 22
                : 4
                : 527-536
                Affiliations
                [1 ] Pontifícia Universidade Católica de Campinas Brazil
                [2 ] Universidade Estadual de Campinas Brazil
                Article
                S1415-52732009000400008
                10.1590/S1415-52732009000400008
                51b7a5c0-05f5-4315-a22f-7fe80668b0c4

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=1415-5273&lng=en
                Categories
                NUTRITION & DIETETICS

                Nutrition & Dietetics
                Body composition,Children,Bioelectrical impedance,Composição corporal,Crianças,Impedância elétrica

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