Bioelectrical Impedance Analysis Overestimates Fat-Free Mass in Breast Cancer Patients Undergoing Treatment

被引:5
作者
Bell, Kirsten Elizabeth [1 ]
Schmidt, Schuyler [1 ]
Pfeiffer, Amanda [1 ]
Bos, Lisa [1 ]
Earthman, Carrie [2 ]
Russell, Caryl [1 ]
Mourtzakis, Marina [1 ]
机构
[1] Univ Waterloo, Dept Kinesiol, BMH 3033,200 Univ Ave West, Waterloo, ON N2L 3G1, Canada
[2] Univ Delaware, Dept Behav Hlth & Nutr, Coll Hlth Sci, Delaware, OH USA
基金
加拿大健康研究院;
关键词
adiposity; bioelectrical impedance analysis; body composition; breast neoplasms; dual-energy x-ray absorptiometry; skeletal muscle; LEAN BODY-MASS; WEIGHT-GAIN; WOMEN; OBESITY; CHEMOTHERAPY; PREDICTION; LYMPHEDEMA; PRECISION; PATTERN; DXA;
D O I
10.1002/ncp.10438
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
Background Bioelectrical impedance analysis (BIA) is commonly used to assess fat-free mass (FFM) and fat mass (FM) in breast cancer patients. However, because of the prevalence of overweight, obesity and variable hydration status in these patients, assumptions for existing prediction equations developed in healthy adults may be violated, resulting in inaccurate body composition assessment. Methods We measured whole-body FFM using single-frequency BIA (50 kHz) and dual-energy x-ray absorptiometry (DXA) in 48 patients undergoing treatment for breast cancer. We applied raw BIA data to 18 previously published FFM prediction equations (FFMBIA) and compared these estimates to DXA (FFMDXA; reference method). Results On average, patients were 52 +/- 10 (mean +/- SD) years of age and overweight (body mass index: 27.5 +/- 5.5 kg/m(2); body fat by DXA: 40.1% +/- 6.6%). Relative to DXA, BIA overestimated FFM by 4.1 +/- 3.4 kg (FFMDXA: 42.0 +/- 5.9 kg; FFMBIA: 46.1 +/- 3.4 kg). Individual equation-generated predictions of FFMBIA ranged from 39.6 +/- 6.7 to 52.2 +/- 5.6 kg, with 16 equations overestimating and 2 equations underestimating FFMBIA compared with FFMDXA. Based on equivalence testing, no equation-generated estimates were equivalent to DXA. Conclusion Compared with DXA, BIA overestimated FFM in breast cancer patients during treatment. Although several equations performed better than others, none produced values that aligned closely with DXA. Caution should be used when interpreting BIA measurements in this clinical population, and future studies should develop prediction equations specific to breast cancer patients.
引用
收藏
页码:1029 / 1040
页数:12
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