Segmental Body Composition Assessment for Obese Japanese Adults by Single-Frequency Bioelectrical Impedance Analysis with 8-point Contact Electrodes

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概要

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• This study aimed to determine the accuracy of segmental body composition variables estimated by singlefrequency BIA with 8-point contact electrodes (SF-BIA8), compared with dual-energy X-ray absorptiometry (DXA). Subjects were 72 obese Japanese adults (43 males and 29 females) aged 30 to 66 years. Segmental body composition variables (fat free mass : FFM, fat mass : FM, and percent fat mass : %FAT) were measured by these techniques. The correlations between impedance values and FFM measured by DXA were calculated. To examine the consistency in predicted values (SF-BIAS) with the reference (DXA), significant mean differences were tested by t-test and the degree of the difference was assessed by effect size. Correlations between the reference and predicted values were calculated. Additionally, the standard error of estimation (SEE) when estimating the reference from the predictor and the relative value of the SEE to the mean value of the DXA measurement (%SEE) were calculated. Systematic error was examined by Bland-Altman plots. High correlations were found between impedance and FFM measured by SF-BIA8. FFM in the extremities showed high correlations with the reference values, but systematic error was found. SF-BIA8 tended to overestimate FFM in the trunk. The consistencies in %FAT and FM with the reference value are inferior to those for FFM, and SEE values in %FAT and FM were greater than those for FFM. The accuracy of the estimated values in the trunk (FFM, %FAT, and FM) are inferior to those of the total body and extremities.

• 日本生理人類学会の論文

著者

• Demura Shinichi

  Kanazawa Univ. Graduate School Of Natural Sci. & Technol.

• Demura Shinichi

  Department Of Physical Education Kanazawa University

• Demura S

  Graduate School Of Natural Science & Technology Kanazawa University

• Noguchi Takanori

  Kanazawa Univ. Graduate School Of Sci. And Technol.

• Noguchi Takanori

  Kanazawa University Graduate School Of Science And Technology

• Demura Shin-ichi

  Department Of Physical Education Kanazawa University

• Sato Susumu

  Life-long Sports Core, Kanazawa Institute of Technology

• Kitabashi Tamotsu

  Yonago National College of Technology

• Demura Shinichi

  Natural Science and Technology, Kanazawa University

• Kitabayashi Tamotsu

  Yonago National College of Technology

• Sato S

  Life-long Sports Core Kanazawa Institute Of Technology

• Sato Susumu

  Department Of Precision Mechanics Faculty Of Engineering Kyoto University

• Sato Susumu

  Life-long Sports Core Kanazawa Institute Of Technology

• Demura Shinichi

  Kanazawa University

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