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The importance of the compartment model of body composition analysis in women with severe obesity
La importancia del modelo compartimental de análisis de composición corporal en mujeres con obesidad severa
DOI:
https://doi.org/10.15446/revfacmed.v69n4.86035Palabras clave:
Obesity, Morbid, Female, Body Composition, Body Mass Index, Sarcopenia (en)Obesidad mórbida, Mujeres, Composición corporal, Índice de masa corporal, Sarcopenia (es)
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Introduction. Obesity is usually diagnosed based only on body mass index (BMI), which may lead to an unreliable body composition analysis.
Objective: To analyze the body characteristics of morbidly obese (class III) women referred to bariatric surgery using the compartment model of body composition analysis.
Materials and methods: Cross-sectional study conducted in 2017 in 14 morbidly obese women aged between 25 and 51 years, who attended clinical and physical therapy assessment prior to undergoing bariatric surgery at a university hospital in Rio de Janeiro, Brazil. Body composition analysis was performed using an octopolar bioimpedance scale. The Pearson’s correlation coefficient was used to analyze the correlation between variables, with a significance level of p<0.05.
Results: A high mean percentage of fat body was observed (51.2%), mainly in the trunk. BMI was correlated with total fat in kilograms (r=0.93), total body fat percentage (TBF%) (r=0.67), total body water (r=0.63), and muscle mass (r=0.60); besides, a moderate correlation with the waist-to-hip ratio (WHR) was found (r=0.55). WHR showed a correlation with TBF% (r=0.60) and a moderate correlation with total fat in kilograms (r=0.57). Moreover, the sarcopenia index was correlated with muscle mass (r=0.79) and total body water (r=0.78). All these correlations were statistically significant (p<0.05). There were no sarcopenia cases.
Conclusion: A higher concentration of fat in the trunk and the upper limbs was observed in the study population; however, none of the participants had sarcopenia. On the other hand, BMI showed a stronger correlation with both total fat (kg) and TBF% than with WHR. Such findings suggest that assessing these patients based only on BMI or WHR may hinder the development individualized treatment strategies.
Introducción. Por lo general, el diagnóstico de obesidad se basa en el índice de masa corporal (IMC), lo que puede resultar en un análisis de la composición corporal no confiable.
Objetivo. Analizar las características corporales de mujeres mórbidamente obesas (Clase III) remitidas a cirugía bariátrica mediante el modelo compartimental de análisis de composición corporal.
Materiales y métodos. Estudio transversal realizado en 2017 en 14 mujeres con obesidad mórbida con edades entre los 25 y 51 años que se encontraban en valoración clínica y por fisioterapia antes de someterse a cirugía bariátrica en un hospital universitario de Rio de Janeiro, Brasil. El análisis de la composición corporal se realizó mediante una balanza de bioimpedancia octopolar. Se utilizó el coeficiente de correlación de Pearson para analizar la correlación entre variables, con un nivel de significancia de p<0.05.
Resultados. Se observó un alto porcentaje promedio de grasa corporal (51.2%), principalmente en el tronco. El IMC se correlacionó con la grasa total en kilogramos (r=0.93), el porcentaje de grasa corporal total (r=0.67), el agua corporal total (r=0.63) y la masa muscular (r=0.60); además, se encontró una correlación moderada con el índice cintura-cadera (IC-C) (r=0.55). Por su parte, el IC-C mostró una correlación con el porcentaje de grasa corporal total (r=0.60) y una correlación moderada con la grasa total en kilogramos (r=0.57). Además, el índice de sarcopenia se correlacionó con la masa muscular (r=0.79) y el agua corporal total (r=0.78). Todas estas correlaciones fueron estadísticamente significativas. No se observó sarcopenia en la muestra.
Conclusión. Se observó una mayor concentración de grasa en el tronco y las extremidades superiores, pero ninguna de las participantes tuvo sarcopenia. Por otra parte, el IMC mostró una mayor correlación con la cantidad de grasa (tanto en kilogramos como en porcentaje de grasa total) que con el IC-C. Estos hallazgos sugieren que evaluar este tipo de pacientes basándose únicamente en el IMC o el I-CC puede dificultar el desarrollo de estrategias de tratamiento individualizado.
Introduction: Usually, the diagnosis of obesity is only based on body mass index (BMI), which may lead to a non-reliable body composition analysis.
Objective: To analyze the body characteristics of morbidly obese (class III) women referred to bariatric surgery using the compartment model of body composition analysis.
Materials and methods: Cross-sectional study conducted in 2017 in 14 morbidly obese women aged between 25 and 51 years who were undergoing clinical and physical therapy assessment prior to undergoing bariatric surgery at a university hospital in Rio de Janeiro, Brazil. Body composition analysis was performed using an octopolar bioimpedance scale. The Pearson's correlation coefficient was used to analyze the correlation between variables, with a significance level of p<0.5.
Results: A high mean percentage of fat body was observed (51.2%), mainly in the trunk. BMI was correlated with total fat in kilograms (r=0.63), and muscle mass (r=0.60); besides, a moderate correlation with the waist-to-hip ratio (WHR) was found (r=0.55). WHR showed a correlation with TBF% (r=0.60) and a moderate correlation with total fat in kilograms (r=0.57). In addition, the sarcopenia index was correlated with muscle mass (r=0.79) and total body water (r=0.78). All these correlations were statistically significant (p<0.05). There were no sarcopenia cases.
Conclusion: A higher concentration of fat in the trunk and the upper limbs was observed in the study population, however none of the participants had sarcopenia. On the other hand, BMI showed a greater correlation with both total fat (kg) and TBF% than with WHR. Such findings suggest that assessing these patients based only on BMI or WHR may hinder the development individualized treatment strategies.
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