Concordância na predição da composição corporal de universitários entre diferentes métodos de avaliaçao

Concordance in prediction body composition of university students between different methods of evaluationThe aim this study was to evaluate the concordance between bioimpedance, perimetry and skinfold thickness. Twenty five students of physical education with an average of 23.46 ± 3.67 years old, BMI 25.58 ± 3,15kg/m², height 171.9 ± 7,25cm and total body mass 72.93 ± 11,17kg participated in the study . To estimate of the body fat percentage were measured by bioimpedance (BIA), skinfold thickness (Guedes and Guedes, 1991) and perimetry. To compare the different methods were carried out analysis of variance (ANOVA), the association was determined by Pearson correlation and the concordance by Bland-Altman method with significance level of p0.05). The correlation between three methods was good (between 0.76 and 0.86). However, the Bland-Altman method, was evidenced a significant difference between bioimpedance x perimetry and perimetry x skinfold thickness (p 0.05). The perimetry tended to overestimate the body fat percentage in relation to other two methods. There was a significant concordance between bioimpedance and skinfold thickness with a wide range of limits of concordance (-6.80 to 4.88%). We concluded that bioimpedande and skinfold thickness methods present concordance and the perimetry overestimates the body fat percentage in students of physical education.O objetivo deste estudo foi avaliar a concordância entre bioimpedância elétrica, perimetria e medidas de dobras cutâneas. A amostra foi composta de 25 universitários acadêmicos de educação física com média de 23,46 ± 3,67 anos de idade, IMC 25,58 ± 3,15kg/m², estatura 171,9 ± 7,25cm e MCT 72,93 ± 11,17kg. As estimativas do percentual de gordura foram realizadas através da Bioimpedância (BIA), dobras cutâneas (Guedes e Guedes, 1991) e da perimetria. Para comparar os diferentes métodos foi realizada a análise de variância one way (ANOVA), a relação foi determinada pela correlação de Pearson e a análise de concordância através do método de Bland-Altman com nível de significância de p0,05) e apresentaram boa correlação (0,76 a 0,86). O método de Bland-Altman evidenciou uma diferença significativa entre BIA x PERI e PERI x DOC (p0,05). A PERI superestimou a estimativa em relação aos outros dois métodos. Houve concordância significativa entre a BIA e DOC com um grande intervalo dos limites de concordância (-6,80 a 4,88%). Podemos concluir que os métodos de BIA e das DOC apresentam concordância e o método da perimetria superestima o percentual de gordura em universitários.