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. 2023 Nov 10;6(1):41605.
doi: 10.33137/cpoj.v6i1.41605. eCollection 2023.

Comparison of Body Composition Methods for Estimating Body Fat Percentage in Lower Limb Prosthesis Users

J D Smith  1 , G Guerra  2 , T B Symons  1 , E H Kwon  1 , E J Yoon  2   3
Affiliations

Comparison of Body Composition Methods for Estimating Body Fat Percentage in Lower Limb Prosthesis Users

J D Smith et al. Can Prosthet Orthot J. .

Abstract

Background: There is a dearth of literature evaluating the accuracy of Air Displacement Plethysmography (ADP) compared to Dual-energy X-ray Absorptiometry (DXA) for assessing body composition in individuals with lower limb amputations. Validity of ADP in persons with lower limb amputations must be established.

Objective: The objective of this study was to compare body composition in persons with lower limb amputations using the BOD POD® and DXA.

Methodology: Body composition was performed on eleven lower limb prosthesis users (age 53.2±14.3 years, weight 81.9±22.3kg) using ADP and DXA with and without prosthesis.

Findings: Repeated measures ANOVA indicated no significant difference in body composition among and between trials, F(3,8)= 3.36, p= 0.075. There were no significant differences in Body Fat (BF) percentage with and without prostheses on the BOD POD (28.5±15.7% and 33.7±12.1%, respectively) nor the DXA (32.9±10.6% and 32.0±9.9%, respectively). Association between the BOD POD and DXA were greatest when prostheses were not worn compared to when they were worn. Bland-Altman plots indicate agreement between BOD POD® and DXA was greatest while wearing the prosthesis.

Conclusion: This study is a first to compare total body fat percent between the BOD POD® and DXA in lower limb prosthesis users. BOD POD® report valid indices of BF%. Future work will utilize the BOD POD® in intervention studies for monitoring body composition changes across the continuum of rehabilitation.

Keywords: ADP; Air Displacement Plethysmography; Amputation; Body Composition; Body Fat; DXA; Dual-Energy X-Ray Absorptiometry; Prosthesis.

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Conflict of interest statement

The authors declare no financial and personal relationships with organizations or individuals that might have influenced their research.

Figures

Figure 1:
Figure 1:
There were no significant differences in percent body fat between BOD POD® and DXA when wearing and not wearing prostheses, p > 0.05. Note: Individual data points are participant data points for BOD POD® and DXA with and without prosthesis.
Figure 2:
Figure 2:
Tighter limits of agreement exist between the BOD POD® and DXA when not wearing prostheses. Note: Solid line represents mean difference and dashed lines represent 95% limits of agreement.
Figure 3:
Figure 3:
Relationships of percent body fat from BOD POD® and DXA with and without prosthesis. Note: There was a stronger association in percent body fat between BOD POD® and DXA when not wearing prostheses (r(9) = 0.87, p = 0.001) compared to wearing it (r(9) = 0.68, p = 0.02) during measurements. The (9) represents the degrees of freedom.
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