Validation of capillary glycemia as a strategy for the screening of diabetes mellitus in adolescents.

Objective: To compare the degree of concordance between plasma and capillary glucose for screening of diabetes mellitus in adolescents.

Methods: The plasma and capillary glucose of 119 adolescents aged 10-19 yr (36 males and 83 females) from public schools in Niterói, Rio de Janeiro State, Brazil, were verified after a 12-h fast. Agreement was assessed through kappa statistics (k), McNemar's chi-squared test, and the intraclass correlation coefficient (ICC).

[Accuracy of different body mass index reference values to predict body fat in adolescents].

This study evaluates the accuracy of cutoff points in the body mass index (BMI) for identifying adolescents with overweight, compared to the percentage of body fat, estimated by electric bioimpediance, in a probabilistic sample of 610 adolescents from 12 to 19 years of age (222 boys and 388 girls) enrolled in public schools in Niterói, Rio de Janeiro, Brazil. ROC was used to evaluate the sensitivity and specificity of BMI cutoffs from one Brazilian, two North American, and one international reference. The cutoff points in the study sample were lower than the other references, with 76% to 95% sensitivity and 75% to 95% specificity.

Insulin resistance in Brazilian adolescent girls: association with overweight and metabolic disorders.

We assessed the association between insulin resistance, overweight and metabolic disorders in a probabilistic sample of 388, 12-19-year-old girls from public schools in Niterói, Rio de Janeiro State, Brazil. Insulin resistance was determined using Homeostatic Model Assessment-Insulin Resistance (HOMA-IR). Overweight and obesity were defined by the sex- and age-specific body mass index cut-offs recommended by the International Obesity Task Force.