Diagnosis of overweight and obesity in adolescents from the 1993 Pelotas Birth Cohort Study, Rio Grande do Sul State, Brazil: comparison of two diagnostic criteria (original) (raw)
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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.
Comparison of three criteria for overweight and obesity classification in brazilian adolescents
Nutrition Journal, 2013
Objective: To describe and compare the nutritional status of adolescents using three criteria for nutritional status classification (Conde & Monteiro, International Obesity Task Force -IOTF and Word Health Organization -WHO), to analyze the correlation between these three criteria as for the overweight proportion, and to investigate whether factors associated with overweight and obesity differ among the three criteria.
Revista Panamericana de Salud P�blica, 2001
Objective. To assess the validity of recommendations for use of the 85th and 95th percentiles of body mass index (BMI) of the population in the United States of America as a screening tool to assess overweight/obesity in adolescents. Methods. We investigated the relation between BMI and percent body fat in 1 540 adolescents (717 males and 823 females) aged 10 to 17.9 years old from a private high school in Niterói, a city in the state of Rio de Janeiro, Brazil. We used bioelectric impedance, with the appropriate equations for adolescents, to estimate percent body fat, which served as the gold standard (30% for girls and 25% for boys) to calculate the sensitivity and specificity of the 85th and 95th percentiles of the United States and Brazilian distribution curves of BMI. Results. Sensitivity and specificity were high (above 80%) for the Niterói boys, except for the 85th percentile of the Brazilian curve (specificity = 61.8%) and for the 95th percentile of the United States curve (sensitivity = 55.4%). For the Niterói girls, the 85th-and 95thpercentile BMI cutoff points, from both the United States and Brazilian curves, showed low sensitivity, and that sensitivity decreased with age. Specificity was high for the girls, and much higher than it was for the boys. Conclusions. These data suggest that using BMI to screen for overweight/obesity in adolescents can generate a high percentage of false-positives for Niterói boys and an even higher percentage of false-negatives for Niterói girls. A more universal approach to using anthropometric measures to screen for overweight/obesity should be developed, preferably linked to stages of maturation. Health of adolescents, obesity, Brazil, body mass index.
Journal of Human Growth and Development, 2016
Introduction: In the diagnosis of overweight and obesity based on body mass index in children and adolescents, several national and international anthropometric references are recommended. However, there is a divergence in the estimated prevalence of overweight and obesity among the references. Objective: To identify the prevalence of overweight and obesity and to analyse the magnitude of agreement among the three references. Methods: A cross-sectional study with 975 students from the early grades of elementary school. The prevalence of overweight and obesity were estimated according to the criteria of the World Health Organization (WHO), the International Obesity Task Force (IOTF) and Conde and Monteiro. The Kappa weighted index was calculated to assess the agreement magnitude among the three references. Results: The highest prevalence of overweight and obesity was estimated by the Conde and Monteiro and WHO references, respectively. Overall, the IOTF revealed lower a magnitude of ...
PubMed, 2006
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 São 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 (ERM85th 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 ERM85th and ERM 95th, yields for females the same sensitivities of 0.50 and 0.20 for both criteria. For males sensitivities for ERM 85th were 0.61 (Must) and 0.49 (Cole); while for ERM95th 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 non-obese adolescent in the two cutoff points considered.
S.V.R. 318 Original The prevalence of overweight and obesity in adolescents in Bahia, Brazil
2016
Objetivo: Un estudio transversal se llevó a cabo con 1477 estudiantes de primaria matriculados en las escuelas públicas de Salvador, Bahía, Brasil, para evaluar la prevalencia del sobrepeso y la obesidad. Métodos: La muestra se determinó por la técnica de muestreo por conglomerados en dos etapas para la selec-ción de escuelas y clases. Más tarde, posteriori error se cal-culó. Los estudiantes fueron clasificados como sobrepeso u obesos de acuerdo con la clasificación de la Organización Mundial de la Salud, 2007. Ellos también fueron clasifica-dos de acuerdo a la edad, la etapa de maduración sexual, y la presencia de obesidad abdominal. Resultados: En general, el 9,3 % de los estudiantes
Trends of underweight, overweight, and obesity in Brazilian children and adolescents
Jornal de Pediatria (Versão em Português), 2013
Objective: To describe and analyze the trends of occurrence of underweight, overweight, and obesity in schoolchildren. Methods: This was a longitudinal study of trends conducted in a voluntary sample of Brazilian children and adolescents. The sample was grouped by year of collection (period I: 2005 and period II: 2007, and period III: 2009, age category (children: 7 to 10 years, and adolescents: 11 to 14 years), and stratified by gender. The body mass index was used to classify the nutritional profile. Trend analysis was verified using multinomial logistic regression (p < 0.05). Results: Mean occurrences were 2.11% for underweight, 22.27% for overweight, and 6.8% for obesity. There was a decrease of underweight in male adolescents from period I to II, as well as an increase in female children from period II to III. Regarding overweight, there was an increase followed by a decrease in male children. Regarding obesity, there was an increase from period I to II in all age groups and for both genders. Conclusion: The prevalence of underweight was less than 5% in all categories of age and gender. However, the categories of overweight and obesity showed higher values, and together comprised almost 30% of the young Brazilian population; moreover, a trend toward increase in prevalence of obesity was observed up to the year 2008, followed by the maintenance of these high prevalence rates. Conclusão: A prevalência do baixo peso apresenta valores menores que 5% em todas as categorias de idade e sexo. No entanto, na categoria do sobrepeso e da obesidade, encontramos ocorrências mais elevadas, atingindo, juntas, quase 30% da população infanto-juvenil brasileira; além disso, evidenciamos uma chance de aumento na prevalência da obesidade até o ano de 2008 e, após, uma manutenção destas altas prevalências.
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.
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.
Objective: to assess the diagnostic criteria and propose cutoff points for waist circumference (WC), arm circumference (AC), leg circumference (LC) and waist/height ratio (WHR) for overweight prediction in adolescents. Methods: a census with all individuals aged 13-19 years old (N=1,075) from the municipality of Caracol-PI, Brazil was carried out; overweight was defined as body mass index (BMI) above one z-score, according to the criterion of the World Health Organization. Results: the cutoff points (in centimeters) of WC, AC, LC and WHR for overweight prediction were, respectively, 76.4, 26.4, 34.0 and 0.460 in males, and 74.6, 27.0, 34.5 and 0.475 in females; the area under the ROC curve was above 0.70 (males) and 0.90 (females). Conclusion: the anthropometric indicators assessed reached satisfactory diagnostic values for overweight prediction in adolescents from the Brazilian semi-arid region.