Comparison of Dual-Energy X-ray Absorptiometry and Bioelectrical Impedance Analysis in the Assessment of Body Composition in Women with Anorexia Nervosa upon Admission and Discharge from an Inpatient Specialist Unit
Abstract
:1. Introduction
2. Materials and Methods
2.1. Anthropometry
2.2. Dual-Energy X-ray Absorptiometry (DXA)
2.3. Bioelectrical Impedance Analysis (BIA)
2.4. Statistical Analysis
3. Results
3.1. Descriptive Statistics of the Sample Population
3.2. Comparison of DXA and BIA Estimates of Body Composition
3.2.1. Fat-Free Mass
3.2.2. Fat Mass
3.2.3. Body Fat Percentage
3.3. Associations of Age, Percentage of Total Body Water, and Time Spent on the Inpatient Specialist Unit with the Difference in Estimates of Body Composition between DXA and BIA
3.4. Associations between Time Spent on the Inpatient Specialist Unit and the Changes in DXA and BIA Estimates of Body Composition from T1 to T2
4. Discussion
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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ANT1 | ANT2 | HC | |
---|---|---|---|
(n = 31) | (n = 25) | (n = 52) | |
Age (years) | 21.0 (9.50) | 21.0 (10.0) | 21.0 (6.00) |
Height (cm) | 163 (6.20) | 164 (6.00) | 164 (7.25) |
Weight (kg) | 43.5 (10.9) | 50.4 (5.40) | 59.2 (7.60) |
BMI (kg/m2) | 16.6 (3.30) | 18.5 (1.30) | 21.8 (2.73) |
DXA | |||
FFM (kg) | 35.8 (6.07) | 39.5 (4.65) | 41.2 (5.05) |
FM (kg) | 6.28 (5.33) | 10.4 (3.72) | 16.0 (5.80) |
BF (%) | 14.5 (8.50) | 22.0 (8.10) | 28.0 (6.25) |
BIA | |||
Resistance: R50 (Ohm) | 502 (153) | 494 (112) | 535 (80.7) |
Reactance: Xc50 (Ohm) | 28.9 (20.2) | 35.5 (9.90) | 46.5 (7.78) |
FFM (kg) | 34.9 (5.87) | 37.7 (3.62) | 43.2 (4.56) |
FM (kg) | 7.70 (4.50) | 11.6 (3.40) | 14.5 (5.53) |
BF (%) | 18.9 (9.60) | 23.1 (6.30) | 25.6 (5.80) |
TBW (%) * | 63.6 (10.4) | 61.5 (6.00) | 53.8 (4.38) |
Model | Group | Independent Variables | Dependent Variables | |||||
---|---|---|---|---|---|---|---|---|
ΔFFM (kg) | ΔFM (kg) | ΔBF% | ||||||
β (95% CI) | Total Adjusted r2 | β (95% CI) | Total Adjusted r2 | β (95% CI) | Total Adjusted r2 | |||
1 | ANT1 | Age | −0.09 (−0.25, 0.06) | 0.06 | 0.08 (−0.07, 0.24) | 0.06 | 0.22 (−0.11, 0.55) | 0.10 |
TBW% | 0.09 (−0.07, 0.25) | −0.10 (−0.26, 0.07) | −0.20 (−0.55, 0.15) | |||||
ANT2 | Age | 0.11 (−0.08, 0.29) | −0.003 | −0.11 (−0.30, 0.08) | 0.01 | −0.07 (−0.52, 0.39) | −0.14 | |
TBW% | 0.05 (−0.20, 0.29) | −0.05 (−0.31, 0.20) | −0.09 (−0.69, 0.51) | |||||
HC | Age | 0.01 (−0.12, 0.13) | −0.04 | −0.01 (−0.13, 0.12) | −0.04 | 0.03 (−0.20, 0.26) | −0.02 | |
TBW% | −0.01 (−0.17, 0.15) | 0.00 (−0.16, 0.16) | −0.12 (−0.41, 0.18) | |||||
2 | ANT2 | Age | 0.15 (−0.06, 0.36) | −0.01 | −0.16 (−0.37, 0.06) | 0.01 | 0.00 (−0.53, 0.54) | −0.20 |
TBW% | 0.02 (−0.24, 0.27) | −0.02 (−0.29, 0.24) | −0.14 (−0.79, 0.51) | |||||
Time spent on the unit | 0.02 (−0.03, 0.08) | −0.03 (−0.09, 0.03) | 0.04 (−0.11, 0.19) |
Time Spent on the Unit | ||
---|---|---|
Adjusted r2 | β (95% CI) | |
DXA | ||
FFM(T2–T1) | 0.33 ** | 0.09 ** (0.04, 0.15) |
FM(T2–T1) | 0.43 *** | 0.12 *** (0.06, 0.17) |
BF%(T2–T1) | 0.73 *** | 0.16 *** (0.12, 0.20) |
BIA | ||
FFM(T2–T1) | 0.34 | 0.10 ** (0.05, 0.16) |
FM(T2–T1) | 0.38 *** | 0.11 *** (0.05, 0.17) |
BF%(T2–T1) | 0.22 ** | 0.16 ** (0.04, 0.28) |
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Abbaspour, A.; Reed, K.K.; Hübel, C.; Bulik-Sullivan, E.C.; Tang, Q.; Bulik, C.M.; Carroll, I.M. Comparison of Dual-Energy X-ray Absorptiometry and Bioelectrical Impedance Analysis in the Assessment of Body Composition in Women with Anorexia Nervosa upon Admission and Discharge from an Inpatient Specialist Unit. Int. J. Environ. Res. Public Health 2021, 18, 11388. https://doi.org/10.3390/ijerph182111388
Abbaspour A, Reed KK, Hübel C, Bulik-Sullivan EC, Tang Q, Bulik CM, Carroll IM. Comparison of Dual-Energy X-ray Absorptiometry and Bioelectrical Impedance Analysis in the Assessment of Body Composition in Women with Anorexia Nervosa upon Admission and Discharge from an Inpatient Specialist Unit. International Journal of Environmental Research and Public Health. 2021; 18(21):11388. https://doi.org/10.3390/ijerph182111388
Chicago/Turabian StyleAbbaspour, Afrouz, Kylie K. Reed, Christopher Hübel, Emily C. Bulik-Sullivan, Quyen Tang, Cynthia M. Bulik, and Ian M. Carroll. 2021. "Comparison of Dual-Energy X-ray Absorptiometry and Bioelectrical Impedance Analysis in the Assessment of Body Composition in Women with Anorexia Nervosa upon Admission and Discharge from an Inpatient Specialist Unit" International Journal of Environmental Research and Public Health 18, no. 21: 11388. https://doi.org/10.3390/ijerph182111388