CUT OFF VALUES FOR WAIST CIRCUMFERENCE TO PREDICT OVERWEIGHT IN BRAZILIAN ADOLESCENTS, ACCORDING TO PUBERTAL STAGING.

Objective: To establish waist circumference cut off points according to pubertal staging to identify overweight in adolescents.

Methods: Longitudinal study approved by the Ethics Research Committee and conducted with 557 adolescents, aged 10 to 15 years old, selected from public schools. Waist, arm, neck and hip circumferences, body fat percentage, body mass index (BMI), height and blood pressure were measured.

Elevated neck circumference and associated factors in adolescents.

Background: Upper body subcutaneous fat, estimated by neck circumference (NC), may present greater metabolic risk than visceral fat. The aim of this study was to determine cutoff values for NC in adolescents that identify overweight and obesity, the prevalence of elevated NC, and its association with associated factors.

Methods: Cross-sectional study with adolescents from public schools in São Paulo.

Reference curves of the body fat index in adolescents and their association with anthropometric variables.

Objectives: To develop reference curves for the body fat index (BFI) in the pediatric population, in adolescents from the city of São Paulo, Brazil, and verify their association with body mass index and body fat percentage.

Methods: The study is part of the research project "Nutritional Profile of Adolescents from Public and Private Schools of São Paulo" that was performed in 2004-2005. A total of 4,686 adolescents (2,130 boys and 2,556 girls) aged 10-15 years were divided into two groups: 10-12 and 13-15 years of age.

Waist-to-height ratio percentiles and cutoffs for obesity: a cross-sectional study in brazilian adolescents.

This study aimed to describe the distribution of waist-to-height ratio (WHtR) percentiles and cutoffs for obesity in Brazilian adolescents. A cross-sectional study including adolescents aged 10 to 15 years was conducted in the city of São Paulo, Brazil; anthropometric measurements (weight, height, and waist-circumference) were taken, and WHtRs were calculated and then divided into percentiles derived by using Least Median of Squares (LMS) regression. The receiver operating characteristic (ROC) curve was used in determining cutoffs for obesity (BMI ≥ 97th percentile) and Mann-Whitney and Kruskal-Wallis tests were used for comparing variables.

Bender Visual-Motor Gestalt Test in adolescents: relationship between visual-motor development and the Tanner Stages.

Visual-motor skill is fundamental to human development and is an important component of psychological evaluations. The goal of the present study was to determine whether there is a correlation between visual-motor development, as measured by the Bender Visual-Motor Gestalt Test (Bender test), and sexual maturity in adolescents, based on the Tanner Stages in Adolescents. 134 adolescents from 10 to 15 years of age participated in the study.

Body fat percentiles of Brazilian adolescents according to age and sexual maturation: a cross-sectional study.

Background: The objective of this study was to determine body fat percentiles of adolescents in the city of São Paulo, Brazil, according to gender, age, and sexual maturation.

Methods: This study involved 4,690 adolescents aged 10-15 years across 31 schools in the city of São Paulo. Sexual maturation was assessed in terms of Tanner stage.

Body mass index percentiles in adolescents of the city of São Paulo, Brazil, and their comparison with international parameters.

Objective: To describe the percentile distribution of body mass index (BMI) in school adolescents, by gender and age, comparing them with international parameters.

Subjects And Methods: The study included 8,020 adolescents aged 10-15 years from 43 schools in the city of São Paulo, southeastern Brazil. BMI values of the study sample were distributed in percentiles and compared to international parameters (CDC, Must and cols.

Body trunk fat and insulin resistance in post-pubertal obese adolescents.

Context And Objective: Insulin resistance is a metabolic disorder commonly associated with excess body fat accumulation that may increase chronic disease risk. The present study was undertaken to evaluate the relationship between body composition and insulin resistance among obese adolescents.

Design And Setting: Cross-sectional study, at the Adolescence Center, Pediatric Department, Universidade Federal de São Paulo.

Evolution of body mass index in two historical series of adolescents.

Objective: To verify the evolution of body mass index (BMI) between two studies of adolescent populations.

Methods: Data on the BMI of 8,020 adolescents aged 10 to 15 years living in the city of São Paulo, Brazil, and enrolled on the 2005 study entitled "The nutritional profile of adolescents at public and private schools in São Paulo" were compared with data from the 1989 National Nutrition and Health Census (PNSN - Pesquisa Nacional sobre Saúde e Nutrição). Binomial testing was used to compare proportions once both data sets had been transformed into percentiles.

Relationship between calcium intake and body mass index in adolescents.

Epidemiologic and experimental data support thee possibility that dietary calcium intake plays a role in human body weight regulation. The aim of the present study was to evaluate calcium intake and its relationship with body mass index (BMI) in adolescents. Weight, height, 3-day food record and a food frequency questionnaire were collected among all adolescents participants at the Outpatient Clinic for Adolescents at the Federal University of Sao Paulo between 2001 and 2003.

[Prevalence of overweight and obesity in school children of Santos city, Brazil].

The aim of this population-based study was to estimate the prevalence of overweight and obesity in public and private schools of Santos city, Brazil. We evaluated a total of 10,822 children aged 7 to 10 years old. Determination of overweight and obesity was obtained by the 85th and 95th percentiles of BMI for age, respectively, as proposed by CDC in 2000.

Impact of the hypocaloric diet using food substitutes on the body weight and biochemical profile.

Recent studies using balanced hypocaloric diets with food substitutes in some meals, have presented positive results. There are no studies with the Brazilian population on the efficacy of using food substitute, together with a hypocaloric diet. Main objective of this study was to verify the effects of a hypocaloric diet using food substitutes as meal replacement on the body weight, lipid profile, and glucose and insulin plasma levels.