Evaluation of foot-to-foot bioelectrical impedance analysis for the prediction of total body water in oncology outpatients receiving radiotherapy

E Isenring, J Bauer, S Capra, PSW Davies

Research output: Contribution to journalArticleResearchpeer-review

22 Citations (Scopus)

Abstract

Objective: To investigate the accuracy of total body water (TBW) predicted by foot-to-foot bioelectrical impedance compared with a deuterium oxide dilution technique in oncology outpatients receiving radiotherapy.

Design: Cross-sectional design.

Setting: Two private Australian radiation oncology facilities.

Subjects: In all, 27 subjects (23 males; four females); mean age 62 (+/-15) y; mean BMI 26.2 kg/m(2) (+/-3.6).

Intervention: TBW was measured using a deuterium oxide dilution technique and predicted using foot-to-foot bioelectrical impedance (Tanita Inc., Tokyo, Japan, Models TBF 410 and 300GS).

Results: The mean (s.d.) values for predicted and measured TBW was 41.5 (6.7) and 39.7 (8.7) l, respectively, indicating a mean bias to overestimation by the foot-to-foot impedance of 1.81. However, a significant negative correlation between the mean of the measurements of TBW and their difference (r = -0.40; P = 0.04) indicates a progressive underestimation of TBW by foot-to-foot impedance as the water content of the body increases. The analysis of 95% limits of agreement (+/-2 s.d.) showed that for most individuals the TBW predicted by foot-to-foot impedance can vary as much as 121 above or 8.61 below the actual TBW measured by a deuterium oxide dilution technique.

Conclusion: There is good agreement between foot-to-foot bioelectrical impedance with a gold standard technique at the group level. However, the significant correlation between the difference of predicted and measured TBW, and the wide limits of agreement between the two methods, indicates that the use of foot-to-foot impedance in assessing TBW may lead to unacceptable error in individuals. Sponsors: The Wesley Research Institute.

Original languageEnglish
Pages (from-to)46-51
Number of pages6
JournalEuropean Journal of Clinical Nutrition
Volume58
Issue number1
DOIs
Publication statusPublished - Jan 2004
Externally publishedYes

Cite this

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title = "Evaluation of foot-to-foot bioelectrical impedance analysis for the prediction of total body water in oncology outpatients receiving radiotherapy",
abstract = "Objective: To investigate the accuracy of total body water (TBW) predicted by foot-to-foot bioelectrical impedance compared with a deuterium oxide dilution technique in oncology outpatients receiving radiotherapy.Design: Cross-sectional design.Setting: Two private Australian radiation oncology facilities.Subjects: In all, 27 subjects (23 males; four females); mean age 62 (+/-15) y; mean BMI 26.2 kg/m(2) (+/-3.6).Intervention: TBW was measured using a deuterium oxide dilution technique and predicted using foot-to-foot bioelectrical impedance (Tanita Inc., Tokyo, Japan, Models TBF 410 and 300GS).Results: The mean (s.d.) values for predicted and measured TBW was 41.5 (6.7) and 39.7 (8.7) l, respectively, indicating a mean bias to overestimation by the foot-to-foot impedance of 1.81. However, a significant negative correlation between the mean of the measurements of TBW and their difference (r = -0.40; P = 0.04) indicates a progressive underestimation of TBW by foot-to-foot impedance as the water content of the body increases. The analysis of 95{\%} limits of agreement (+/-2 s.d.) showed that for most individuals the TBW predicted by foot-to-foot impedance can vary as much as 121 above or 8.61 below the actual TBW measured by a deuterium oxide dilution technique.Conclusion: There is good agreement between foot-to-foot bioelectrical impedance with a gold standard technique at the group level. However, the significant correlation between the difference of predicted and measured TBW, and the wide limits of agreement between the two methods, indicates that the use of foot-to-foot impedance in assessing TBW may lead to unacceptable error in individuals. Sponsors: The Wesley Research Institute.",
author = "E Isenring and J Bauer and S Capra and PSW Davies",
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journal = "European Journal of Clinical Nutrition",
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Evaluation of foot-to-foot bioelectrical impedance analysis for the prediction of total body water in oncology outpatients receiving radiotherapy. / Isenring, E; Bauer, J; Capra, S; Davies, PSW.

In: European Journal of Clinical Nutrition, Vol. 58, No. 1, 01.2004, p. 46-51.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Evaluation of foot-to-foot bioelectrical impedance analysis for the prediction of total body water in oncology outpatients receiving radiotherapy

AU - Isenring, E

AU - Bauer, J

AU - Capra, S

AU - Davies, PSW

PY - 2004/1

Y1 - 2004/1

N2 - Objective: To investigate the accuracy of total body water (TBW) predicted by foot-to-foot bioelectrical impedance compared with a deuterium oxide dilution technique in oncology outpatients receiving radiotherapy.Design: Cross-sectional design.Setting: Two private Australian radiation oncology facilities.Subjects: In all, 27 subjects (23 males; four females); mean age 62 (+/-15) y; mean BMI 26.2 kg/m(2) (+/-3.6).Intervention: TBW was measured using a deuterium oxide dilution technique and predicted using foot-to-foot bioelectrical impedance (Tanita Inc., Tokyo, Japan, Models TBF 410 and 300GS).Results: The mean (s.d.) values for predicted and measured TBW was 41.5 (6.7) and 39.7 (8.7) l, respectively, indicating a mean bias to overestimation by the foot-to-foot impedance of 1.81. However, a significant negative correlation between the mean of the measurements of TBW and their difference (r = -0.40; P = 0.04) indicates a progressive underestimation of TBW by foot-to-foot impedance as the water content of the body increases. The analysis of 95% limits of agreement (+/-2 s.d.) showed that for most individuals the TBW predicted by foot-to-foot impedance can vary as much as 121 above or 8.61 below the actual TBW measured by a deuterium oxide dilution technique.Conclusion: There is good agreement between foot-to-foot bioelectrical impedance with a gold standard technique at the group level. However, the significant correlation between the difference of predicted and measured TBW, and the wide limits of agreement between the two methods, indicates that the use of foot-to-foot impedance in assessing TBW may lead to unacceptable error in individuals. Sponsors: The Wesley Research Institute.

AB - Objective: To investigate the accuracy of total body water (TBW) predicted by foot-to-foot bioelectrical impedance compared with a deuterium oxide dilution technique in oncology outpatients receiving radiotherapy.Design: Cross-sectional design.Setting: Two private Australian radiation oncology facilities.Subjects: In all, 27 subjects (23 males; four females); mean age 62 (+/-15) y; mean BMI 26.2 kg/m(2) (+/-3.6).Intervention: TBW was measured using a deuterium oxide dilution technique and predicted using foot-to-foot bioelectrical impedance (Tanita Inc., Tokyo, Japan, Models TBF 410 and 300GS).Results: The mean (s.d.) values for predicted and measured TBW was 41.5 (6.7) and 39.7 (8.7) l, respectively, indicating a mean bias to overestimation by the foot-to-foot impedance of 1.81. However, a significant negative correlation between the mean of the measurements of TBW and their difference (r = -0.40; P = 0.04) indicates a progressive underestimation of TBW by foot-to-foot impedance as the water content of the body increases. The analysis of 95% limits of agreement (+/-2 s.d.) showed that for most individuals the TBW predicted by foot-to-foot impedance can vary as much as 121 above or 8.61 below the actual TBW measured by a deuterium oxide dilution technique.Conclusion: There is good agreement between foot-to-foot bioelectrical impedance with a gold standard technique at the group level. However, the significant correlation between the difference of predicted and measured TBW, and the wide limits of agreement between the two methods, indicates that the use of foot-to-foot impedance in assessing TBW may lead to unacceptable error in individuals. Sponsors: The Wesley Research Institute.

U2 - 10.1038/sj.ejcn.1601744

DO - 10.1038/sj.ejcn.1601744

M3 - Article

VL - 58

SP - 46

EP - 51

JO - European Journal of Clinical Nutrition

JF - European Journal of Clinical Nutrition

SN - 0954-3007

IS - 1

ER -