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Validity of body adiposity index in predicting body fat in a sample of brazilian women
Author(s) -
Cerqueira Matheus,
Amorim Paulo,
Magalhães Filipe,
Castro Eliane,
Franco Frederico,
Franceschini Sylvia,
Cerqueira Lizbeth,
Marins João,
Doimo Leonice
Publication year - 2013
Publication title -
obesity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.438
H-Index - 199
eISSN - 1930-739X
pISSN - 1930-7381
DOI - 10.1002/oby.20543
Subject(s) - concordance , medicine , concordance correlation coefficient , body adiposity index , bland–altman plot , correlation coefficient , dual energy x ray absorptiometry , limits of agreement , pearson product moment correlation coefficient , body mass index , body fat percentage , standard error , correlation , gold standard (test) , kappa , nuclear medicine , mathematics , statistics , classification of obesity , fat mass , bone mineral , geometry , osteoporosis
Objective This study aimed to verify the validity of BAI in predicting %BF in a sample of Brazilian women Design and Methods A total of 102 women (average age 60.3 ± 9.8) were assessed. To determine percentage body fat (% BF), dual‐energy X‐ray absorptiometry (DXA) was used as the “gold standard.” To evaluate the association between body adiposity index (BAI) and % BF assessed by DXA, we used Pearson's correlation coefficient. Paired sample t ‐test was used to test differences in mean % BF between BAI and DXA. To evaluate the concordance between % BF measured by DXA and estimated by BAI, we used the Lin's concordance correlation coefficient and the agreement analysis of Bland‐Altman. Results The correlation between % BF obtained by DXA and that estimated by BAI was r = 0.65, P < 0.001. Paired t ‐test showed significant mean difference between methods ( P < 0.0001). Lin's concordance correlation coefficient was C_b = 0.73, which is classified as poor, while the Bland‐Altman plots showed BAI underestimating % BF in relation to the used criterion measure in a large portion of the sample. Conclusions Results of the present study show that BAI presented low agreement with % BF measured by DXA, which is not recommended for % BF prediction in this studied sample.