Validation of multi‐frequency bioelectrical impedance analysis versus dual‐energy X‐ray absorptiometry to measure body fat percentage in overweight/obese Colombian adults
Dados Bibliográficos
| AUTOR(ES) | |
|---|---|
| AFILIAÇÃO(ÕES) | Laboratorio de Ciencias de la Actividad Física, el Deporte y la Salud Universidad de Santiago de Chile, USACH Santiago 7500618 Chile, Centro de Estudios para la Medición de la Actividad Física «CEMA» Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario Bogota DC 111221 Colombia, Max Planck Institute for Human Development, Berlin, Germany, and University of Granada, Spain,, Grupo de Ejercicio Físico y Deportes, Vicerrectoria de Investigaciones Universidad Manuela Beltrán Bogota DC 110231 Colombia, Grupo GICAEDS, Facultad de Cultura Física, Deporte y Recreación Universidad Santo Tomás Bogota DC 110311 Colombia |
| ANO | Não informado |
| TIPO | Artigo |
| DOI | 10.1002/ajhb.23071 |
| ADICIONADO EM | 2025-08-18 |
Resumo
ObjectivesTo verify the validity of multi‐frequency bioelectrical impedance analysis (mBCA) for predicting body fat percentage (BF%) in overweight/obese adults using dual‐energy X‐ray absorptiometry (DXA) as the reference method.MethodsForty‐eight adults participated (54% women, mean age = 41.0 ± 7.3 years old). The Pearson's correlation coefficient was used to evaluate the correlation between BIA and BF% assessed by DXA. The concordance between BF% measured by both methods was obtained with Lin's concordance correlation coefficient and Bland–Altman difference plots.ResultsMeasures of BF% were estimated as 39.0 (SD = 6.1) and 38.3 (SD = 6.5) using DXA and mBCA, respectively. The Pearson's correlation coefficient reflected a strong correlation (r =.921, P = .001). The paired t‐test showed a significant mean difference between these methods for obese men BF% of −0.6 [(SD 1.95; 95% CI = −4.0 to 3.0), P =.037]. Overall, the bias of the mBCA was −0.6 [(SD 2.2; 95% CI = −5.0 to 3.7), P =.041], which indicated that the mBCA method significantly underestimated BF% in comparison to the reference method. Finally, in both genders, Lin's concordance correlation coefficient showed a strong agreement. More specifically the DXA value was ρc = 0.943 (95% CI = 0.775 to 0.950) and the mBCA value was ρc = 0.948 (95% CI = 0.778 to 0.978).ConclusionsOur analysis showed a strong agreement between the two methods as reflected in the range of BF%. These results show that mBCA and DXA are comparable methods for measuring body composition with higher body fat percentages. However, due to broad limits of agreement, we can only recommend mBCA for groups of populations.