Precisión del diagnóstico de obesidad en adolescentes brasileños: comparación de los criterios de COLE y cols. y de MUST y cols. con el porcentaje DXA sobre masa grasa

Objectives: to assess the accuracy of the two most used anthropometric criteria: Must and Cole to diagnose obesity in adolescence comparing with percentage of fat mass determined by DXA.Methodology: cross-sectional study with 418 adolescents (52.4% males) attending a private school in Se Paulo/Brazil. Anthropometric measures of height and weight were taken and BMI was calculated. Analysis of body composition was performed using the DXA to detect percentage of fat mass. Using the method proposed by Ellis & Wong (ERM) two sex-specific linear regression models of fat percentage for age in years were fitted. The comparison between the methods was carried out through the analyses of specificity and sensitivity with two residual percentiles as cutoff points (ERM85(th) and ERM95th) as standards. A logistic model was fitted to estimate the probability curves of obesity classification.Results: the comparison of the two classic criteria for the diagnosis of obesity with the ERM85(th) and ERM 95(th), yields for females the same sensitivities of 0.50 and 0.20 for both criteria. For males sensitivities for ERM 85(th) were 0.61(Must) and 0.49 (Cole); while for ERM95(th) the sensitivities were 0.81 (Must) and 0.64 (Cole). Therefore, there are high probabilities that those criteria diagnose adolescents as obese, when actually they are not.Conclusion: the Must and Cole criteria were similar and present flaws for the diagnosis of obesity. In clinical practice and field studies anthropometric criteria should be evaluated as to the diagnostic accuracy along with other clinical parameters and, when feasible, the analysis of fatness percentage. However, the anthropometric criteria evaluated are efficient in the identification of nonobese adolescent in the two cutoff points considered.UNIFESP, EPM, Depto Pediat, Disciplina Nutrol, BR-04040032 Sao Paulo, BrazilState Univ Rio de Janeiro, Dept Nutr, Rio De Janeiro, BrazilUNISINUS, Dept Nutr, Porto Alegre, RS, BrazilUNIFESP, EPM, Depto Pediat, Disciplina Nutrol, BR-04040032 Sao Paulo, BrazilWeb of Scienc

Estudo da composicao quimica (gorduras totais, valor calorico total, proteinas totais, imunoglobulinas e acido s graxos) do colostro de nutrizes adolescentes

BV UNIFESP: Teses e dissertaçõe

Estimated dietary fiber intake by children according to different food composition reference tables.

The importance of dietary fiber intake in the prevention and treatment of adult diseases has been widely emphasized in the literature for several years. Recommendations for fiber intake by children have only recently began to be published. The present study estimated the fiber intake by children with or without constipation according to five food composition tables. We studied 114 children under 12 years of age, of whom 56 were constipated and 58 had normal bowel movements. We used a 24 hour recall questionnaire and fiber consumption was analysed by five food composition tables: 1. Association of Official Agricultural Chemist- AOAC, 2. Southgate, 3. Mendez, 4. Englyst and 5. crude fiber. The statistical analysis showed significant differences between the medians of the estimated fiber consumption calculated using all tables, except the AOAC and Southgate tables. The median value and percentis 25th and 75 th presented between parenthesis were (grams/day): Mendez - 15,4(11,9-19,6); Southgate -10,5(7,8-13,5); AOAC - 10,2(7,3-14,0); Englyst - 4,5 (3,0-6,0) and crude fiber - 2,1 (1,4-2,9). There were statistical significant correlations between all pairs of tables but the best correlation was observed between Mendez and Southgate (r=+0,90), AOAC and Southgate (r=+0,88); and Mendez and AOAC (r=+0,84). Constipated children presented lower estimated fiber intake than those with normal bowel movements, with statistical significance according to all tables. In conclusion, it is important to determine which reference table should be utilized when recommending dietary fiber.Univ Fed Sao Paulo, Escola Paulista Med, Dept Pediat, Disciplina Nutr & Metab Infantil, Sao Paulo, BrazilUniv Fed Sao Paulo, Escola Paulista Med, Dept Pediat, Disciplina Nutr & Metab Infantil, Sao Paulo, BrazilWeb of Scienc