Comparison of three bioelectrical impedance methods with DXA in overweight and obese men

Ian R. Pateyjohns, Grant D. Brinkworth, Jonathan D. Buckley, Manny Noakes, Peter M. Clifton

Research output: Contribution to journalArticle

114 Citations (Scopus)


Objective: To compare bioelectrical impedance analysis (BIA) of body composition using three different methods against DXA in overweight and obese men. Research Methods and Procedures: Forty-three healthy overweight or obese men (ages 25 to 60 years; BMI, 28 to 43 kg/m2) underwent BIA assessment of body composition using the ImpediMed SFB7 (version 6; ImpediMed, Ltd., Eight Mile Plains, Queensland, Australia) in multifrequency mode (Imp-MF) and DF50 single-frequency mode (Imp-SF) and the Tanita UltimateScale (Tanita Corp., Tokyo, Japan). Validity was assessed by comparison against DXA using linear regression and limits of agreement analysis. Results: All three BIA methods showed good relative agreement with DXA [Imp-MF: fat mass (FM), r 2 = 0.81; fat-free mass (FFM), r2 = 0.81; percentage body fat (BF%), r2 = 0.69; Imp-SF: FM, r2 = 0.65; FFM, r 2 = 0.76; BF%, r2 = 0.40; Tanita: BF%, r2 = 0.44; all p < 0.001]. Absolute agreement between DXA and Imp-MF was poor, as indicated by a large bias and wide limits of agreement (bias, ± 1.96 standard deviation; FM, -6.6 ± 7.7 kg; FFM, 8.0 ± 7.1 kg; BF%, -7.0 ± 6.6%). Imp-SF and Tanita exhibited a smaller bias but wide limits of agreement (Imp-SF: FM, -1.1 ± 8.5 kg; FFM, 2.5 ± 7.9 kg; BF%, -1.7 ± 7.3%; Tanita: BF%, 1.2 ± 9.5%). Discussion: Compared with DXA, Imp-MF produced large bias and wide limits of agreement, and its accuracy estimating body composition in overweight or obese men was poor. Imp-SF and Tanita demonstrated little bias and may be useful for group comparisons, but their utility for assessment of body composition in individuals is limited.

Original languageEnglish
Pages (from-to)2064-2070
Number of pages7
Issue number11
Publication statusPublished - 1 Nov 2006
Externally publishedYes


  • Bioelectrical impedance analysis
  • Body composition
  • Body fat
  • Multifrequency
  • Single-frequency

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology
  • Nutrition and Dietetics

Cite this

Pateyjohns, I. R., Brinkworth, G. D., Buckley, J. D., Noakes, M., & Clifton, P. M. (2006). Comparison of three bioelectrical impedance methods with DXA in overweight and obese men. Obesity, 14(11), 2064-2070.