Resumen

RODRIGUES BARBOSA, Aline et al. Comparação da gordura corporal de mulheres idosas segundo antropometria, bioimpedância e DEXA. ALAN [online]. 2001, vol.51, n.1, pp.49-56. ISSN 0004-0622.

Comparison of body fat using anthropometry, bioelectrical impedance and DEXA in elderly women. Verify correspondence and compare percentage body fat (%BF) estimates by skinfold thickness (SKT), bioelectrical impedance analysis (BIA) and DEXA. Twenty voluntaries women (aged 62 - 79 yr) were assessed. The body fat was estimated using two different equations of SKT(Jackson (19); Durning and Womersley, (20)), BIA using two-predictions formulas (23) and DEXA. To compare mean values of %BF was used analysis of variance for repeated measures (ANOVA _ Bonferroni), the correlation of the inter-method was verified by Pearson correlation coefficients (r), and correspondence between prediction formulas was tested by using the approach by Bland and Altman (25). The %BF assessed by BIA (23) shown poor correlation (r<0.5) with two SKT equations. The %BF ranged from 31.5 ± 5.5 to 41.2 ± 6.1 (mean ± SD) for Jackson (19) e DEXA, respectively. The analysis of variance shown no significant differences (p >0,05) between methods and/or equations by BIA (RJL-CompCorp) vs. DC-Jackson (19). There were observed significant differences (p < 0,001) between all comparisons. The correspondence between RJL-CompCorp vs. Deurenberg (23) was good and the same was observed for DEXA vs. Durning and Womersley (20). Although the methods and/or equations used in this study have been commonly utilized to estimate BF in elderly subjects, they neither must be used as a standard method. Each method has limitations and the comparison can be useful for interpretation of results

Palabras clave : Anthropometry; DEXA; bioelectrical impedance analysis (BIA); elderly women.