Agreement between the results of body composition analysis from two electrical bioimpedance devices

Abstract Electrical bioimpedance analysis (BIA) has become the most widely used technique to assess body composition (BC) due to its accessibility and practicality. However, it is necessary to validate these emerging devices to guarantee sensitivity and specificity. The objective was to analyze the concordance between the results of BC analysis between two bioelectrical impedance devices. Values equivalent to the concordance correlation coefficient (CCC) for muscle mass (MM), body fat (BF) percentage and bone mineral content (BMC) estimated by the BIODY XPERT ZM 3 ® and TANITA ® BC601 devices presented magnitudes between 0.992, 0.979 and 0.928 respectively, while body water (BW) percentage was less than other indicators (0.869). MM was overestimated and BF, BW and BMC were underestimated. CCC and Bland-Altman plot indicate that the results obtained by both devices can be considered comparable.