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The role of body adiposity index in determining body fat percentage in colombian adults with overweight or obesity

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Ramírez-Vélez, Robinson
Correa Bautista, Jorge Enrique
González-Ruíz, Katherine
Tordecilla Sanders, María Alejandra
García-Hermoso, Antonio
Schmidt-RioValle, Jacqueline
González-Jiménez, Emilio



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The aim of this study is to investigate the accuracy of body adiposity index (BAI) as a convenient tool for assessing body fat percentage (BF%) in a sample of adults with overweight/obesity using bioelectrical impedance analysis (BIA). The study population was composed of 96 volunteers (60% female, mean age 40.6 ± 7.5 years old). Anthropometric characteristics (body mass index, height, waist-to-height ratio, hip and waist circumference), socioeconomic status, and diet were assessed, and BF% was measured by BIA-BF% and by BAIBF%. Pearson’s correlation coefficient was used to evaluate the correlation between BAI-BF% and BF% assessed by BIA-BF%, while controlling for potential confounders. The concordance between the BF% measured by both methods was obtained with a paired sample t-test, Lin’s concordance correlation coefficient, and Bland-Altman plot analysis. Overall, the correlation between BF% obtained by BIA-BF% and estimated by BAI-BF% was r = 0.885, p less than 0.001, after adjusting for potential confounders (age, socioeconomic status, and diet). Lin’s concordance correlation coefficient was moderate in both sexes. In the men, the paired t-test showed a significant mean difference in BF% between the methods (-5.6 (95%CI -6.4 to -4.8); p less than 0.001). In the women, these differences were (-3.6 (95%CI -4.7 to -2.5); p less than 0.001). Overall, the bias of the BAI-BF% was -4.8 ± 3.2 BF%; p less than 0.001), indicating that the BAI-BF% method significantly underestimated the BF% in comparison with the reference method. In adults with overweight/obesity, the BAI presents low agreement with BF% measured by BIA-BF%; therefore, we conclude that BIA-BF% is not accurate in either sex when body fat percentage levels are low or high. Further studies are necessary to confirm our findings in different ethnic groups. © 2017 by the authors. Licensee MDPI, Basel, Switzerland.
Palabras clave
Adult , Ethnic group , Fat reserve , Obesity , Prediction , Action potential , Adult , Age distribution , Anthropometric parameters , Article , Body adiposity index , Body fat percentage , Body height , Body mass , Cohort analysis , Colombia , Controlled study , Correlation coefficient , Diet , Female , Hip circumference , Human , Impedance , Major clinical study , Male , Measurement accuracy , Obesity , Population research , Sex difference , Social status , Student t test , Waist circumference , Waist hip ratio , Adipose tissue , Epidemiology , Hispanic , Middle aged , Pathophysiology , Physiology , Reproducibility , Statistics and numerical data , Waist to height ratio , Colombia , Adipose tissue , Adiposity , Adult , Body mass index , Colombia , Female , Hispanic americans , Humans , Male , Middle aged , Obesity , Overweight , Reproducibility of results , Waist circumference , Waist-height ratio , Adults , Body composition , Obesity , Prediction , Validity