Equations based on anthropometry to predict body fat measured by absorptiometry in schoolchildren and adolescents
Objective: To develop and validate equations to estimate the percentage of body fat of children and adolescents from Mexico using anthropometric measurements. Methods: A cross-sectional study was carried out with 601 children and adolescents from Mexico aged 5–19 years. The participants were randoml...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-07-01
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| Series: | Jornal de Pediatria |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0021755717300426 |
| _version_ | 1798004712264433664 |
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| author | Luis Ortiz-Hernández A. Valeria Vega López Norma Ramos-Ibáñez L. Joana Cázares Lara R. Joab Medina Gómez Diana Pérez-Salgado |
| author_facet | Luis Ortiz-Hernández A. Valeria Vega López Norma Ramos-Ibáñez L. Joana Cázares Lara R. Joab Medina Gómez Diana Pérez-Salgado |
| author_sort | Luis Ortiz-Hernández |
| collection | DOAJ |
| description | Objective: To develop and validate equations to estimate the percentage of body fat of children and adolescents from Mexico using anthropometric measurements. Methods: A cross-sectional study was carried out with 601 children and adolescents from Mexico aged 5–19 years. The participants were randomly divided into the following two groups: the development sample (n = 398) and the validation sample (n = 203). The validity of previously published equations (e.g., Slaughter) was also assessed. The percentage of body fat was estimated by dual-energy X-ray absorptiometry. The anthropometric measurements included height, sitting height, weight, waist and arm circumferences, skinfolds (triceps, biceps, subscapular, supra-iliac, and calf), and elbow and bitrochanteric breadth. Linear regression models were estimated with the percentage of body fat as the dependent variable and the anthropometric measurements as the independent variables. Results: Equations were created based on combinations of six to nine anthropometric variables and had coefficients of determination (r2) equal to or higher than 92.4% for boys and 85.8% for girls. In the validation sample, the developed equations had high r2 values (≥85.6% in boys and ≥78.1% in girls) in all age groups, low standard errors (SE ≤ 3.05% in boys and ≤3.52% in girls), and the intercepts were not different from the origin (p > 0.050). Using the previously published equations, the coefficients of determination were lower, and/or the intercepts were different from the origin. Conclusions: The equations developed in this study can be used to assess the percentage of body fat of Mexican schoolchildren and adolescents, as they demonstrate greater validity and lower error compared with previously published equations. Resumo: Objetivo: Desenvolver e validar equações para estimar o percentual de gordura corporal (%GC) de crianças e adolescentes do México utilizando medidas antropométricas. Métodos: Foi realizado um estudo transversal com 601 crianças e adolescentes do México com idades entre 5 e 19 anos. Os participantes foram divididos aleatoriamente nos seguintes dois grupos: a amostra de desenvolvimento (n = 398) e a amostra de validação (n = 203). A validade das equações publicadas anteriormente (por exemplo, Slaughter) também foi avaliada. O %GC foi estimado por absorciometria de dupla energia de raios-X (raio-X de dupla energia (DXA)). As medidas antropométricas incluíram estatura, altura sentado, peso, circunferências da cintura e do braço, dobras cutâneas (tríceps, bíceps, subescapular, suprailíaca e panturrilha) e larguras do cotovelo e bitrocantérica. Os modelos de regressão linear foram estimados com o %GC sendo a variável dependente e as medidas antropométricas como as variáveis independentes. Resultados: As equações foram criadas com base nas combinações de seus a nove variáveis antropométricas e apresentaram coeficientes de determinação (r2) iguais ou superiores a 92,4% para meninos e 85,8% para meninas. Na amostra de validação, as equações desenvolvidas apresentaram altos valores de r2 (≥ 85,6% em meninos e ≥ 78,1% em meninas) em todos os grupos, baixo nível de erros padrão (EP ≤ 3,05% em meninos e ≤ 3,52% em meninas) e os interceptos não foram diferentes da origem (p > 0,050). Utilizando as equações publicadas anteriormente, os coeficientes de determinação foram menores e/ou os interceptos foram diferentes da origem. Conclusões: As equações desenvolvidas neste estudo podem ser utilizadas para avaliar o %GC das crianças em idade escolar e adolescentes mexicanos, pois elas possuem uma maior validade e menor erro em comparação às equações publicadas anteriormente. Keywords: Body fat, Children, Adolescents, Mexico, Dual X-ray absorptiometry, Anthropometry, Palavras-chave: Gordura corporal, Crianças, Adolescentes, México, Absorciometria de dupla energia de raios-X, Antropometria |
| first_indexed | 2024-04-11T12:27:44Z |
| format | Article |
| id | doaj.art-368e567d5a9240028e499861be1f8944 |
| institution | Directory Open Access Journal |
| issn | 0021-7557 |
| language | English |
| last_indexed | 2024-04-11T12:27:44Z |
| publishDate | 2017-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Jornal de Pediatria |
| spelling | doaj.art-368e567d5a9240028e499861be1f89442022-12-22T04:23:52ZengElsevierJornal de Pediatria0021-75572017-07-01934365373Equations based on anthropometry to predict body fat measured by absorptiometry in schoolchildren and adolescentsLuis Ortiz-Hernández0A. Valeria Vega López1Norma Ramos-Ibáñez2L. Joana Cázares Lara3R. Joab Medina Gómez4Diana Pérez-Salgado5Corresponding author.; Universidad Autónoma Metropolitana (UAM), Departamento de Salud, Mexico City, MexicoUniversidad Autónoma Metropolitana (UAM), Departamento de Salud, Mexico City, MexicoUniversidad Autónoma Metropolitana (UAM), Departamento de Salud, Mexico City, MexicoUniversidad Autónoma Metropolitana (UAM), Departamento de Salud, Mexico City, MexicoUniversidad Autónoma Metropolitana (UAM), Departamento de Salud, Mexico City, MexicoUniversidad Autónoma Metropolitana (UAM), Departamento de Salud, Mexico City, MexicoObjective: To develop and validate equations to estimate the percentage of body fat of children and adolescents from Mexico using anthropometric measurements. Methods: A cross-sectional study was carried out with 601 children and adolescents from Mexico aged 5–19 years. The participants were randomly divided into the following two groups: the development sample (n = 398) and the validation sample (n = 203). The validity of previously published equations (e.g., Slaughter) was also assessed. The percentage of body fat was estimated by dual-energy X-ray absorptiometry. The anthropometric measurements included height, sitting height, weight, waist and arm circumferences, skinfolds (triceps, biceps, subscapular, supra-iliac, and calf), and elbow and bitrochanteric breadth. Linear regression models were estimated with the percentage of body fat as the dependent variable and the anthropometric measurements as the independent variables. Results: Equations were created based on combinations of six to nine anthropometric variables and had coefficients of determination (r2) equal to or higher than 92.4% for boys and 85.8% for girls. In the validation sample, the developed equations had high r2 values (≥85.6% in boys and ≥78.1% in girls) in all age groups, low standard errors (SE ≤ 3.05% in boys and ≤3.52% in girls), and the intercepts were not different from the origin (p > 0.050). Using the previously published equations, the coefficients of determination were lower, and/or the intercepts were different from the origin. Conclusions: The equations developed in this study can be used to assess the percentage of body fat of Mexican schoolchildren and adolescents, as they demonstrate greater validity and lower error compared with previously published equations. Resumo: Objetivo: Desenvolver e validar equações para estimar o percentual de gordura corporal (%GC) de crianças e adolescentes do México utilizando medidas antropométricas. Métodos: Foi realizado um estudo transversal com 601 crianças e adolescentes do México com idades entre 5 e 19 anos. Os participantes foram divididos aleatoriamente nos seguintes dois grupos: a amostra de desenvolvimento (n = 398) e a amostra de validação (n = 203). A validade das equações publicadas anteriormente (por exemplo, Slaughter) também foi avaliada. O %GC foi estimado por absorciometria de dupla energia de raios-X (raio-X de dupla energia (DXA)). As medidas antropométricas incluíram estatura, altura sentado, peso, circunferências da cintura e do braço, dobras cutâneas (tríceps, bíceps, subescapular, suprailíaca e panturrilha) e larguras do cotovelo e bitrocantérica. Os modelos de regressão linear foram estimados com o %GC sendo a variável dependente e as medidas antropométricas como as variáveis independentes. Resultados: As equações foram criadas com base nas combinações de seus a nove variáveis antropométricas e apresentaram coeficientes de determinação (r2) iguais ou superiores a 92,4% para meninos e 85,8% para meninas. Na amostra de validação, as equações desenvolvidas apresentaram altos valores de r2 (≥ 85,6% em meninos e ≥ 78,1% em meninas) em todos os grupos, baixo nível de erros padrão (EP ≤ 3,05% em meninos e ≤ 3,52% em meninas) e os interceptos não foram diferentes da origem (p > 0,050). Utilizando as equações publicadas anteriormente, os coeficientes de determinação foram menores e/ou os interceptos foram diferentes da origem. Conclusões: As equações desenvolvidas neste estudo podem ser utilizadas para avaliar o %GC das crianças em idade escolar e adolescentes mexicanos, pois elas possuem uma maior validade e menor erro em comparação às equações publicadas anteriormente. Keywords: Body fat, Children, Adolescents, Mexico, Dual X-ray absorptiometry, Anthropometry, Palavras-chave: Gordura corporal, Crianças, Adolescentes, México, Absorciometria de dupla energia de raios-X, Antropometriahttp://www.sciencedirect.com/science/article/pii/S0021755717300426 |
| spellingShingle | Luis Ortiz-Hernández A. Valeria Vega López Norma Ramos-Ibáñez L. Joana Cázares Lara R. Joab Medina Gómez Diana Pérez-Salgado Equations based on anthropometry to predict body fat measured by absorptiometry in schoolchildren and adolescents Jornal de Pediatria |
| title | Equations based on anthropometry to predict body fat measured by absorptiometry in schoolchildren and adolescents |
| title_full | Equations based on anthropometry to predict body fat measured by absorptiometry in schoolchildren and adolescents |
| title_fullStr | Equations based on anthropometry to predict body fat measured by absorptiometry in schoolchildren and adolescents |
| title_full_unstemmed | Equations based on anthropometry to predict body fat measured by absorptiometry in schoolchildren and adolescents |
| title_short | Equations based on anthropometry to predict body fat measured by absorptiometry in schoolchildren and adolescents |
| title_sort | equations based on anthropometry to predict body fat measured by absorptiometry in schoolchildren and adolescents |
| url | http://www.sciencedirect.com/science/article/pii/S0021755717300426 |
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