COMPARISON OF MULTI-FREQUENCY BIOELECTRICAL IMPEDANCE ANALYSIS AND AIR DISPLACEMENT PLETHYSMOGRAPHY FOR ASSESSMENT OF BODY COMPOSITION
C.J. Alfiero, M.C. Nelson, R.D. Midence, J.R. Ball, C.A. Vella, FACSM
University of Idaho, Moscow, ID
Multi-frequency bioelectrical impedance analysis (MF-BIA) is widely used for body composition assessment; however, few studies have assessed the accuracy of MF-BIA. PURPOSE: To examine the agreement between MF-BIA and air displacement plethysmography (BOD POD) for the assessment of body fat percentage (BF%), fat mass (FM) and fat free mass (FFM) in middle- and older-aged adults. METHODS: 28 women (age 52.4 ± 9.2 y; body mass index 25.7 ± 4.6 kg·m-2) and 15 men (age 50.1 ± 12.4 y; body mass index 25.5 ± 4.1 kg·m-2) participated in the study. BF%, FM and FFM were estimated using MF-BIA (InBody 770) and BOD POD. Agreement was assessed using intraclass correlation coefficients (ICC) and Bland-Altman analyses. One-sample t-tests and linear regressions were used to evaluate systematic and proportional bias, with limits of agreement defined as standard deviation multiplied by 1.96. RESULTS: ICC demonstrated there was a strong relationship between the methods for BF% (men ICC = 0.86; women ICC = 0.96), FM (men ICC = 0.94; women ICC = 0.99), and FFM (men ICC = 0.92; women ICC = 0.90, pCONCLUSION:Overall, there was acceptable agreement between MF-BIA and BOD POD for all body composition parameters. However, there was significant proportional bias, with differences between men and women. These findings indicate that MF-BIA may be a suitable alternative for assessment of body composition. Future research should utilize a larger sample size to confirm these results.
Supported by InBody USA.
Alfiero, CJ; Nelson, MC; Midence, RD; Ball, JR; and Vella, FACSM, CA
"COMPARISON OF MULTI-FREQUENCY BIOELECTRICAL IMPEDANCE ANALYSIS AND AIR DISPLACEMENT PLETHYSMOGRAPHY FOR ASSESSMENT OF BODY COMPOSITION,"
International Journal of Exercise Science: Conference Proceedings: Vol. 8:
7, Article 15.
Available at: https://digitalcommons.wku.edu/ijesab/vol8/iss7/15