Variables psicológicas y su relación con la evolución del índice de masa corporal en personas sometidas a cirugía bariátrica.

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Bibliographic Details
Title:	Variables psicológicas y su relación con la evolución del índice de masa corporal en personas sometidas a cirugía bariátrica.
Alternate Title:	Psychological variables and their relationship with the evolution of the body mass index in people undergoing bariatric surgery.
Authors:	Gatica-Saavedra, Mariela¹, Nazar C., Gabriela² gnazar@udec.cl, Bustos N., Claudio³
Source:	Revista de Cirugia. 2020, Vol. 72 Issue 2, p130-136. 7p.
Abstract (English):	Background: Bariatric surgery is one of the effective options for the reduction of body weight, however, there is no clarity regarding the postoperative weight loss curve, moreover, there are findings that suggest wide individual variability and the factors associated with this phenomenon are not clear yet. Aim: This study sought to identify the influence of psychological factors such as eating self-efficacy, eating patterns and social support on the variation of BMI in patients who have undergone bariatric surgery through the surgical technique of vertical sleeve gastrectomy. Materials and Method: A total of 31 operated patients in a public hospital in southern Chile participated in the study. The Gompertz growth curve was used to model BMI variation curves and nonlinear regression to ascertain the influence of the study variables. Results: The maximum weight loss occurs around the ninth month after surgery. The initial BMI shows a significant difference in the reduction of BMI (p = 0.04) as well as the social support perceived and the sub-factor friends (p = 0.03). The psychological variables, treated individually, had no effect on the weight variation curve; however, when treated as a group, they were able to predict the maximum of weight loss and its speed, even controlling for the initial BMI. Discussion: According to previous studies, these findings confirm that the individual variability in the evolution of BMI after surgery is affected by psychosocial factors. Conclusion: Pre-surgical assessment and post-surgery follow-up are recommended, taking into account not only biomedical variables but also psychological factors. [ABSTRACT FROM AUTHOR]
Abstract (Spanish):	Introducción: La cirugía bariátrica es una de las opciones efectivas para la reducción del peso corporal, sin embargo, no existe claridad respecto de la evolución de la baja de peso corporal, más aún, algunos hallazgos sugieren amplia variabilidad individual en la curva de variación del Índice de Masa Corporal (IMC). Los factores asociados a este fenómeno no son claros aún. Objetivo: Esta investigación buscó identificar la influencia de factores psicológicos: autoeficacia alimentaria, patrones de alimentación y apoyo social percibido, en la variación del IMC en pacientes sometidos a cirugía bariátrica. Materiales y Método: Participaron 31 pacientes intervenidos en un hospital público del sur de Chile. Se utilizó la curva de crecimiento de Gompertz para modelar las curvas de variación de IMC y regresión no lineal para conocer la influencia de las variables de estudio. Resultados: El porcentaje máximo de reducción de IMC, se produjo al noveno mes tras la cirugía. El IMC de inicio mostró una influencia significativa en la reducción del IMC (p = 0,04) lo mismo que el apoyo social percibido, subfactor amigos (p = 0,03). Las variables psicológicas estudiadas, tratadas individualmente, no afectaron la curva de variación de IMC, sin embargo, tratadas de modo agrupado lograron predecir el porcentaje máximo de reducción de IMC y su velocidad, incluso controlando el IMC de inicio. Discusión: Se confirman hallazgos previos respecto de que la variabilidad individual en la evolución del IMC postcirugía se ve afectada por factores psicológicos. Conclusión: Variables psicológicas y no exclusivamente biomédicas, inciden en la evolución del IMC postcirugía, por lo que se sugiere atender a estos aspectos, tanto en la evaluación prequirúrgica como en el seguimiento postcirugía. [ABSTRACT FROM AUTHOR]
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Database:	MedicLatina

Description
Abstract:	Background: Bariatric surgery is one of the effective options for the reduction of body weight, however, there is no clarity regarding the postoperative weight loss curve, moreover, there are findings that suggest wide individual variability and the factors associated with this phenomenon are not clear yet. Aim: This study sought to identify the influence of psychological factors such as eating self-efficacy, eating patterns and social support on the variation of BMI in patients who have undergone bariatric surgery through the surgical technique of vertical sleeve gastrectomy. Materials and Method: A total of 31 operated patients in a public hospital in southern Chile participated in the study. The Gompertz growth curve was used to model BMI variation curves and nonlinear regression to ascertain the influence of the study variables. Results: The maximum weight loss occurs around the ninth month after surgery. The initial BMI shows a significant difference in the reduction of BMI (p = 0.04) as well as the social support perceived and the sub-factor friends (p = 0.03). The psychological variables, treated individually, had no effect on the weight variation curve; however, when treated as a group, they were able to predict the maximum of weight loss and its speed, even controlling for the initial BMI. Discussion: According to previous studies, these findings confirm that the individual variability in the evolution of BMI after surgery is affected by psychosocial factors. Conclusion: Pre-surgical assessment and post-surgery follow-up are recommended, taking into account not only biomedical variables but also psychological factors. [ABSTRACT FROM AUTHOR]
ISSN:	24524557
DOI:	10.35687/s2452-45492020002450