title: Comparison of body composition by bioelectrical impedance analysis and dual-energy X-ray absorptiometry in Hispanic diabetics.
abstract: OBJECTIVE: The purpose of this study was to compare Tanita tetrapolar foot-to-foot bioelectrical impedance analysis (Model TBF-310, Tanita Corporation of America, Inc, Arlington Heights, IL; Tanita-BIA) and fan beam dual-energy X-ray absorptiometry (Hologic Discovery A v12.6, Waltham, MA; DXA) in diabetic patients.  METHODS: Seventy Hispanic diabetic participants (23 male, 47 female; mean age: 53.03 ± 10.32 yrs; mean weight: 81.45 ± 17.65 kg; and mean body mass index: 31.40 ± 6.80 kg/m(2)) were selected from the Loma Linda University En Balance culturally-sensitive Spanish diabetes education program using the baseline data.  RESULTS: DXA vs Tanita-BIA fat mass (FM), percent fat mass (%FM), and fat-free mass (FFM) were compared using Pearson's (FM: 0.96, %FM: 0.91, and FFM: 0.95), and Spearman's rank (FM: 0.94, %FM: 0.91, and FFM: 0.93) correlation coefficients. Bland-Altman analyses were also used to compare the difference (DXA - BIA) vs average of DXA and BIA results and showed general agreement between the two methods. When Tanita-BIA was regressed onto DXA, the adjusted R(2) was: FM=0.91; %FM=0.83; FFM=0.90. Gender combined concordance correlations with 95% confidence intervals were calculated using a bootstrap re-sampling of the data and found high associations [FM: 0.93 (95% CI: 0.89, 0.96)], [%FM: 0.86 (95% CI: 0.79, 0.90)], and [FFM: 0.93 (95% CI: 0.89, 0.96)].  CONCLUSION: Tanita-BIA may provide valid measures of fat, percent body fat and fat-free mass in Hispanic diabetics, and could be a convenient and practical approach for assessment in community-based research.
authors.affiliation: Loma Linda University, School of Public Health; Loma Linda, CA.
authors.forename: W L
authors.initials: WL
authors.lastname: Beeson
authors.forename: M
authors.initials: M
authors.lastname: Batech
authors.forename: E
authors.initials: E
authors.lastname: Schultz
authors.forename: L
authors.initials: L
authors.lastname: Salto
authors.forename: A
authors.initials: A
authors.lastname: Firek
authors.forename: M
authors.initials: M
authors.lastname: Deleon
authors.forename: H
authors.initials: H
authors.lastname: Balcazar
authors.forename: Z
authors.initials: Z
authors.lastname: Cordero-Macintyre