Accuracy of Body Mass Index Cutoffs for Classifying Obesity in Chilean Children and Adolescents
AbstractObjective: To determine the accuracy of two international Body Mass Index (BMI) cut-offs for classifying obesity compared to the percentage of fat mass (%FM) assessed by Dual-Energy X-ray Absorptiometry (DXA) in a Chilean sample of children and adolescents; Material and Methods: The subjects studied included 280 children and adolescents (125 girls and 155 boys) aged 8 to 17 years. Weight and height were measured. The BMI was calculated. Two international references (IOFT and WHO) were used as cut-off points. The %FM was assessed by DXA. The receiver operating characteristic (ROC) curve was used to assess the performance of BMI in detecting obesity on the basis of %FM; Results: A high correlation was observed between the %FM measured by the DXA and the Z-scores of IOTF and WHO scores in the Chilean adolescents separated by sex (r = 0.78–0.80). Differences occurred in both references (IOFT and WHO) in relation to the criteria (p < 0.001). Both references demonstrated a good ability to predict sensitivity (between 84% and 93%) and specificity (between 83% and 88%) in both sexes of children and adolescents; Conclusions: A high correlation was observed between the Z-score of the BMI with the percentage of fat determined by the DXA. Despite this, the classifications using the different BMI cut-off points showed discrepancies. This suggests that the cut-off points selected to predict obesity in this sample should be viewed with caution. View Full-Text
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Gómez-Campos, R.; David Langer, R.; de Fátima Guimarães, R.; Contiero San Martini, M.; Cossio-Bolaños, M.; de Arruda, M.; Guerra-Júnior, G.; Moreira Gonçalves, E. Accuracy of Body Mass Index Cutoffs for Classifying Obesity in Chilean Children and Adolescents. Int. J. Environ. Res. Public Health 2016, 13, 472.
Gómez-Campos R, David Langer R, de Fátima Guimarães R, Contiero San Martini M, Cossio-Bolaños M, de Arruda M, Guerra-Júnior G, Moreira Gonçalves E. Accuracy of Body Mass Index Cutoffs for Classifying Obesity in Chilean Children and Adolescents. International Journal of Environmental Research and Public Health. 2016; 13(5):472.Chicago/Turabian Style
Gómez-Campos, Rossana; David Langer, Raquel; de Fátima Guimarães, Roseane; Contiero San Martini, Mariana; Cossio-Bolaños, Marco; de Arruda, Miguel; Guerra-Júnior, Gil; Moreira Gonçalves, Ezequiel. 2016. "Accuracy of Body Mass Index Cutoffs for Classifying Obesity in Chilean Children and Adolescents." Int. J. Environ. Res. Public Health 13, no. 5: 472.
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