Validity of Bioelectrical Impedance Analysis to Estimation Fat-Free Mass in the Army Cadets

Autor(es)

Langer, Raquel D. ^[1] ; Borges, Juliano H. ^[1] ; Pascoa, Mauro A. ^[1] ; Cirolini, Vagner X. ^[1] ; Guerra-Junior, Gil ^[1] ; Goncalves, Ezequiel M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, UNICAMP, Ctr Invest Pediat CIPED, Growth & Dev Lab, Sch Med Sci, BR-13083887 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: NUTRIENTS; v. 8, n. 3 MAR 2016.
• Citações Web of Science: 10

Resumo

Background: Bioelectrical Impedance Analysis (BIA) is a fast, practical, non-invasive, and frequently used method for fat-free mass (FFM) estimation. The aims of this study were to validate predictive equations of BIA to FFM estimation in Army cadets and to develop and validate a specific BIA equation for this population. Methods: A total of 396 males, Brazilian Army cadets, aged 17-24 years were included. The study used eight published predictive BIA equations, a specific equation in FFM estimation, and dual-energy X-ray absorptiometry (DXA) as a reference method. Student's t-test (for paired sample), linear regression analysis, and Bland-Altman method were used to test the validity of the BIA equations. Results: Predictive BIA equations showed significant differences in FFM compared to DXA (p < 0.05) and large limits of agreement by Bland-Altman. Predictive BIA equations explained 68% to 88% of FFM variance. Specific BIA equations showed no significant differences in FFM, compared to DXA values. Conclusion: Published BIA predictive equations showed poor accuracy in this sample. The specific BIA equations, developed in this study, demonstrated validity for this sample, although should be used with caution in samples with a large range of FFM. (AU)

• Processo FAPESP: 11/23460-1 - Risco cardiometabólico em pacientes com a forma clássica da Hiperplasia Adrenal Congênita por deficiência da enzima 21-hidroxilase.
• Beneficiário: Ezequiel Moreira Gonçalves
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado