Trends of body composition among adolescents according to maturation stage and body mass index (original) (raw)
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BMC Pediatrics, 2013
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. The body fat percentage was calculated using skinfold thickness. Percentile curves were calculated using the LMS (curve, mean, and coefficient of variation) method. Results: The mean body fat percentages were lower in boys aged 10-12 and 13-15 years than in girls. Body fat percentages decreased progressively with sexual maturation in boys, but increased in girls. The 85th, 95th, and 97th percentiles represent the cutoff points for moderately elevated, elevated, and very elevated body fat percentages, respectively, in pre-pubescent boys (85th, 95th, and 97th percentiles: 32.54, 95 41.04, and 97, respectively) and pubescent boys (31.09, 36.30, and 44.33, respectively). These cutoff points were lower in pre-pubescent girls (29.52, 35.01, and 41.82, respectively) and in the 97th percentile in pubescent girls (31.55, 36.20, and 41.86, respectively). Conclusion: To our knowledge, these are the first body fat percentages cutoff points according to sexual maturation for adolescents aged 10-15 years in Brazil. Our results provide a significant contribution to the assessment of body composition in this population.
Journal of Human Growth and Development, 2014
ResumoO objetivo foi analisar a associação entre maturação sexual relativamente acelerada, excesso de peso e adiposidade central em crianças e adolescentes. Foi realizado um estudo longitudinal com 617 crianças e adolescentes de 8 a 18 anos de idade. Foram realizadas três coletas de dados de peso, estatura, perímetro da cintura. O excesso de peso foi classificado com base nos valores críticos do índice de massa corporal (IMC) para crianças e adolescentes brasileiros. Oestágio de maturação sexual (EMS) foi autoavaliado nas três coletas pelas crianças e adolescentes. Os indivíduos foram distribuídos em quartis de idades segundo EMS e sexo. Foramcomparados os indivíduos com maturação relativamente acelerada com os demais indivíduos. Os dados foram analisados por meio de análises de regressão linear e logística. Foi observada associação negativa entre escore z do IMC e idade de início da maturação sexual em meninos, não sendo observada associação no sexo feminino. A maturação sexual rel...
Public Health Nutrition, 2014
Objective: The aim of the present study was to compare BMI and anthropometric indicators of abdominal obesity in Brazilian adolescents from public schools between 2003 and 2008. Design: A comparison of anthropometric indicators in adolescents was done based on two cross-sectional surveys conducted in 2003 (n 530) and in 2008 (n 498). BMI (5 weight/height 2 ), waist circumference (WC), hip circumference (HC), waist-to-hip ratio (WHR) and waist-to-height ratio (WHtR) were evaluated. The age-adjusted means were compared between the two studies by linear regression and the percentile values were compared by quantile regression. A P value ,0?05 was adopted for statistical significance. Setting: Metropolitan area of Rio de Janeiro, Brazil. Subjects: Two probabilistic samples of students aged 15-19 years old, from public schools.
Motriz: Revista de Educação Física, 2018
To estimate the prevalence of the classifications of overweight and obesity in adolescents according to three criteria for nutritional status classification (Conde & Monteiro, International Obesity Task Force-IOTF and Word Health Organization-WHO), and to investigate whether sociodemographic factors associated with overweight and obesity differ among the three criteria. Method: cross-sectional study with 1,132 adolescents (14-19 years old) living in Brazil. Body Mass Index (BMI) was classified according to three criteria for nutritional status. A self-administered questionnaire was used to collect sociodemographic information. Sexual maturation was measured by self-reported Tanner stage ratings. Multinomial logistic regression was used to estimate the Odds Ratio and 95% confidence intervals. Results: The prevalence of the classification "overweight" (from here on referred to simply as "overweight") was 23.1% for WHO; 23.7% for Conde & Monteiro criteria: and 19.2% for IOTF. Both boys and girls aged 17-19 were more likely to be overweight using the WHO and Conde & Monteiro criteria than those using the IOTF criteria. Girls in the postpubertal maturational stage were less likely of being overweight or obese using the three criteria. Conclusion: The three criteria result in different prevalence measures, with WHO and Conde and Monteiro criteria being more approximate in terms of prevalence and correlated factors when compared to IOTF criteria.
Prevalência de sobrepeso e obesidade em adolescentes escolares do município de Fortaleza, Brasil
2007
OBJECTIVES: to determine overweight and obesity prevalence in adolescent students in the Municipality of Fortaleza, Brazil and to estimate prevalence rates of public and private schools according to gender and age group (early and late adolescence). METHODS: a cross sectional study performed in the period of March to May 2003 comprised of 1158 adolescents, 571 from public schools and 587 from private schools. Overweight was defined when body mass index (BMI) was determined to be equal or above percentile 85 and under percentile 95; obesity was defined when BMI was determined as equal or over percentile 95, regardless of age and gender. RESULTS: total prevalence of overweight and obesity was of 19.5%. In private schools, overweight/obesity reached 23.9%, a rate higher than in public schools (18.0%) (p = 0.018). Overweight/ obesity prevalence in the male gender (19.6%) was similar to the female gender (19.0%) p = 0.80), in early adolescence, prevalence was (24.1%) higher than in late adolescence (15.0%) (p < 0.0001). CONCLUSIONS: overweight and obesity prevalence in adolescent students of the city of Fortaleza was determined to be high, in private schools and higher in early adolescence with no difference between genders.
Growth and Body Mass Index of Brazilians Ages 9 Through 17 Years
Obesity Research, 1995
SICHD3IU,ROSELY,EL€SABETI'A RECINE AND JAMES EEWRHART. GrowthandbodymassindexofBrazillians ages9 through 17years. ObesRes. 1995;3(supp12): 117s-121s. Obesity during adolescenceis considered astrongpredictorof adultobesity,andobesity andoverweighthave been increasing among Brazilian adults. To gauge the relative frequency of overweight among adolescents inBrazi1,we compared the distributions of body mass index (kg/m*) and statureinnational populationbased samples of the U.S. and Brazil. U.S. adolescents were on average about 10 cm taller than Brazilians, although growth spurts occurred at the same age for both populations. Brazilian adolescents were leaner than their U.S. counterparts. This difference was reducedamong girlsinthepostpubertalperiod. At age 17 years,U.S. boyswere about 10 kg heavier thanBrazilian boys, but the difference among girls was only 2 kg. In families above the poverty levelinthe more developed South region,bodymassindex distributionforboys was closerto that of theU.S., and older girls tended to have higher body mass index than U.S. girls. Within Brazil, body mass index variedby ethnicitywithMulattos,butnot Blacb,of both sexes having lower body mass index than Whites of the same age. Urban adolescents hadhigherbody mass index than those living in rural areas. In general, the patterns seen among Brazilian adults were found among children. Among girls, in particular, overweight has become an identifiable problem during adolescence.
Arquivos Brasileiros de Endocrinologia & Metabologia, 2010
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. and Cole and cols.). RESULTS: Both male and female adolescents aged 10 to 14 years showed BMI cut-offs over the international parameters, especially in the P50-P85 percentile range. At the age of 15, the observed values were very similar to reference data; however, BMI values in the 95th percentile were much higher than international parameters. CONCLUSIONS: The study results show how important it is to use adequate BMI values for Brazilian adolescents aged 10-15 since international parameters may not reflect the actual nutritional status of this group.
Jornal de Pediatria
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. 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. Body mass, height, body mass index, hip circumference, body fat percentage, body fat index, and sexual maturation performed by the self-assessment method (prepubertal, pubertal, and postpubertal) were analyzed. ANOVA was performed, as well as percentile distribution, Pearson's correlation, and Bland-Altman plot. In boys, there was an increase in body mass, height, body mass index, and hip circumference with advancing age and Tanner stage. In girls, there was an increase in b...
Cadernos de Saúde Pública, 2007
Various cut-off points for body mass index have been proposed to assess nutritional status in adolescents. The aim of this study was to compare two methods for evaluating overweight and obesity. In 2004-5, 4,452 adolescents from the 1993 Pelotas (Brazil) birth cohort study were evaluated, representing 87.5% of the original cohort. Overweight and obesity were evaluated using the methods proposed by the World Health Organization (WHO) and International Obesity Task Force (IOTF). Prevalence of overweight was similar when comparing the two methods (WHO: 23.2%; IOTF: 21.6%). Prevalence of obesity was higher according to the WHO criterion (total sample: 11.6%; boys: 15.1%; girls: 8.2%) as compared to IOTF (total sample: 5.0%; boys: 5.6%; girls: 4.4%). The kappa statistic was around 0.9 for determining overweight and 0.4 for obesity. The IOTF classification showed high specificity in comparison to the WHO criterion for determining overweight and obesity. However, sensitivity was high for overweight but low for obesity. Our data show that the IOTF classification underestimates the prevalence of obesity in early adolescence Body Mass Index; Overweight; Obesity; Adolescent ARTIGO ARTICLE