title: Performance of Two Bioelectrical Impedance Analyses in the Diagnosis of Overweight and Obesity in Children and Adolescents: The FUPRECOL Study.
abstract: This study aimed to determine thresholds for percentage of body fat (BF%) corresponding to the cut-off values for overweight/obesity as recommended by the International Obesity Task Force (IOTF), using two bioelectrical impedance analyzers (BIA), and described the likelihood of increased cardiometabolic risk in our cohort deﬁned by the IOTF and BF% status. Participants included 1165 children and adolescents (54.9% girls) from Bogotá (Colombia). Body mass index (BMI) was calculated from height and weight. BF% of each youth was assessed ﬁrst using the Tanita BC-418® followed by a Tanita BF-689®. The sensitivity and speciﬁcity of both devices and their ability to correctly classify children as overweight/obesity (≥2 standard deviation), as deﬁned by IOTF, was investigated using receiver operating characteristic (ROC) by sex and age groups (9-11, 12-14, and 13-17 years old); Area under curve (AUC) values were also reported. For girls, the optimal BF% threshold for classifying into overweight/obesity was found to be between 25.2 and 28.5 (AUC = 0.91-0.97) and 23.9 to 26.6 (AUC = 0.90-0.99) for Tanita BC-418® and Tanita BF-689®, respectively. For boys, the optimal threshold was between 16.5 and 21.1 (AUC = 0.93-0.96) and 15.8 to 20.6 (AUC = 0.92-0.94) by Tanita BC-418® and Tanita BF-689®, respectively. All AUC values for ROC curves were statistically signiﬁcant and there were no differences between AUC values measured by both BIA devices. The BF% values associated with the IOTF-recommended BMI cut-off for overweight/obesity may require age- and sex-speciﬁc threshold values in Colombian children and adolescents aged 9-17 years and could be used as a surrogate method to identify individuals at risk of excess adiposity.
authors: Centro de Estudios para la Medición de la Actividad Física «CEMA», Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá D.C. 111221, Colombia. robin640@hotmail.com.
authors: Robinson
authors: R
authors: Ramírez-Vélez
authors: Centro de Estudios para la Medición de la Actividad Física «CEMA», Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá D.C. 111221, Colombia. jorge.correa@urosario.edu.co.
authors: Jorge Enrique
authors: JE
authors: Correa-Bautista
authors: Centro de Estudios para la Medición de la Actividad Física «CEMA», Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá D.C. 111221, Colombia. javiermartinezt@usantotomas.edu.co.
authors: Javier
authors: J
authors: Martínez-Torres
authors: Grupo de Ejercicio Físico y Deportes, Vicerrectoría de Investigaciones, Universidad Manuela Beltrán, Bogotá D.C. 110231, Colombia. Katherine.gonzalez@docentes.umb.edu.co.
authors: Katherine
authors: K
authors: González-Ruíz
authors: Grupo CTS-436, Adscrito al Centro de Investigación Mente, Cerebro y Comportamiento (CIMCYC), Departamento de Enfermería, Universidad de Granada, Granada 18071, España. emigoji@ugr.es.
authors: Emilio
authors: E
authors: González-Jiménez
authors: Grupo CTS-436, Adscrito al Centro de Investigación Mente, Cerebro y Comportamiento (CIMCYC), Departamento de Enfermería, Universidad de Granada, Granada 18071, España. jschmidt@ugr.es.
authors: Jacqueline
authors: J
authors: Schmidt-RioValle
authors: Laboratorio de Ciencias de la Actividad Física, el Deporte y la Salud, Universidad de Santiago de Chile, USACH, Santiago 7500618, Chile. antonio.garcia.h@usach.cl.|Facultad de Ciencias de la Salud, Universidad San Sebastián, Santiago 8420524, Chile. antonio.garcia.h@usach.cl.
authors: Antonio
authors: A
authors: Garcia-Hermoso
mesh_terms: D000273:Adipose Tissue; D000293:Adolescent; D000886:Anthropometry / Q000295:instrumentation* / Q000379:methods; D019540:Area Under Curve; D001823:Body Composition; D015992:Body Mass Index; D002648:Child; D003105:Colombia; D003430:Cross-Sectional Studies; D017097:Electric Impedance; D005260:Female; D006801:Humans; D008297:Male; D050177:Overweight / Q000175:diagnosis*; D063766:Pediatric Obesity / Q000175:diagnosis*; D012372:ROC Curve; D012016:Reference Values; D012680:Sensitivity and Specificity
keywords: bioelectrical impedance analysis; diagnosis; nutritional status; youths