Abstract:
:The study aims to describe body phenotypes estimated by multivariate technique for the assessment of nutritional status in adolescence during the process of sexual maturation. The sample consisted of 833 schoolchildren 10 to 15 years of age, selected by complex sampling in Piracicaba, São Paulo State, Brazil. Body phenotypes were defined by principal components analysis (PCA) based on anthropometric data (body mass, height, skinfolds, and waist circumference), body composition (phase angle measurement by bioelectric impedance), biochemical parameters (triglycerides, glucose, total/LDL cholesterol ratio, hemoglobin), and sexual maturation (self-classification of stages of pubic hair and breasts or genitals). Body phenotypes were: P1adiposity, characterized by a positive association with the variables skinfolds, body mass, and waist circumference; P2puberty, characterized by positive association with stages of pubic hair and breasts in girls or genitals in boys, height, and age; P3biochemical, characterized by positive association with cholesterol, triglycerides, and glucose; and P4muscular, characterized by positive association with phase angle and hemoglobin and negative association with glucose. Only P1adiposity showed a strong association with body mass index, and there was independence between P1adiposity and P2puberty. Our results highlight the independence between biochemical parameters, anthropometry, body composition, and sexual maturation. Body phenotypes can provide the basis for calculating scores on likelihood of obesity based on anthropometric variables and overcoming ambiguity with the use of body mass. :Nosso objetivo é descrever fenótipos corporais estimados por técnica multivariada para avaliação do estado nutricional na adolescência, durante o processo de maturação sexual. A amostra foi composta por 833 adolescentes escolares de 10 a 15 anos selecionados por amostragem complexa em Piracicaba, São Paulo, Brasil. Os fenótipos corporais foram definidos por análise de componentes principais (ACP) a partir de dados antropométricos (massa corporal, altura, dobras cutâneas e circunferência da cintura), de composição corporal (ângulo de fase medido por impedância bioelétrica), bioquímicos (triglicerídeos, glicose, razão colesterol total/LDL, hemoglobina) e de maturação sexual (autoclassificação dos estágios de pelos pubianos e mamas ou gônadas). Os fenótipos corporais foram: F1adiposidade, caracterizado pela associação positiva com as variáveis dobras cutâneas, massa corporal e circunferência da cintura; F2puberdade, caracterizado pela associação positiva com estágios de pelos pubianos, mama em meninas ou gônada em meninos, altura e idade; F3bioquímico, caracterizado pela associação positiva com colesterol, triglicerídeos e glicose; e F4muscular, caracterizado pela associação positiva com ângulo de fase, hemoglobina e negativa com glicose. Somente F1adiposidade apresenta associação forte com o índice de massa corporal, e há independência entre F1adiposidade e F2puberdade. Nossos resultados ressaltam a independência apresentada entre parâmetros bioquímicos, de antropometria, de composição corporal e de maturação sexual. A proposta de fenótipos corporais poderá embasar cálculo de escores da probabilidade de estar obeso a partir das variáveis antropométricas e superar a ambiguidade na utilização da massa corporal. :Nuestro objetivo es describir fenotipos corporales estimados por técnica multivariada para la evaluación del estado nutricional en la adolescencia, durante el proceso de madurez sexual. La muestra estaba compuesta por 833 adolescentes, escolares de 10 a 15 años, seleccionados por una muestra compleja en Piracicaba, São Paulo, Brasil. Los fenotipos corporales fueron definidos por un análisis de componentes principales (ACP), a partir de datos antropométricos (masa corporal, altura, pliegues cutáneos y circunferencia de la cintura), de composición corporal (ángulo de fase medido por impedancia bioeléctrica), bioquímicos (triglicéridos, glucosa, razón colesterol total/LDL, hemoglobina) y de madurez sexual (autoclasificación de las etapas de pelos púbicos y mamas o gónadas). Los fenotipos corporales fueron: F1adiposidad, caracterizado por la asociación positiva con las variables pliegues cutáneos, masa corporal y circunferencia de la cintura; F2pubertad, caracterizado por la asociación positiva con etapas de pelos púbicos, mama en niñas o gónadas en niños, altura y edad; F3bioquímico, caracterizado por la asociación positiva con colesterol, triglicéridos y glucosa; y F4muscular, caracterizado por la asociación positiva con ángulo de fase, hemoglobina y negativa con glucosa. Solamente F1adiposidad presenta una asociación fuerte con el índice de masa corporal, y existe independencia entre F1adiposidad y F2pubertad. Nuestros resultados resaltan la independencia presentada entre parámetros bioquímicos, de antropometría, de composición corporal y de madurez sexual. La propuesta de fenotipos corporales podrá servir de base para el cálculo de marcadores de probabilidad de estar obeso, a partir de las variables antropométricas, y superar así la ambigüedad en la utilización de la masa corporal.
journal_name
Cad Saude Publicajournal_title
Cadernos de saude publicaauthors
Cumpian-Silva J,Rinaldi AEM,Mazzeti CMDS,Conde WLdoi
10.1590/0102-311X00057217subject
Has Abstractpub_date
2018-03-12 00:00:00pages
e00057217issue
3eissn
0102-311Xissn
1678-4464pii
S0102-311X2018000305013journal_volume
34pub_type
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