Butte N F, Hopkinson J M, Ellis K J, Wong W W, Smith E O
Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA.
Int J Obes Relat Metab Disord. 1997 Oct;21(10):874-80. doi: 10.1038/sj.ijo.0800482.
(1) To compare 2-, 3- and 4-component models of body composition based on total body water (TBW), underwater weighing (UWW), skinfold thicknesses (SF), total body potassium (TBK), dual-energy X-ray absorptiometry (DXA) and total body electrical conductivity (TOBEC); (2) to compare postpartum changes in body composition estimated by the 2-, 3- and 4-component models and (3) to test for an effect of pregnancy or lactation on the hydration, density and potassium content of fat free mass (FFM) in postpartum women.
Longitudinal measurements of body composition at 3, 6 and 12 months postpartum.
Thirty-five healthy postpartum women, aged 30.2 +/- 3.5 y.
Body composition was estimated by 2-component models based on TBW, UWW, SF, TBK, DXA or TOBEC; 3-component models based on TBW and UWW (Fuller 3, Siri 3); and a 4-component model (Fuller 4) based on TBW, UWW and bone mineral content.
Systematic differences were seen among the various body composition models, with the following ranking from lowest to highest estimate of fat mass (FM): TOBEC, TBW, Fuller 3, Siri 3, Fuller 4, UWW, SF, TBK, and DXA. Estimated changes in FFM and FM were not significantly different among methods, except for the 3-6 months FFM and FM changes estimated from TBW, which differed from SF, DXA, and TOBEC. Pregnancy-induced changes in the hydration, density and potassium content of FFM were not evident by 3 months postpartum (0.73 +/- 0.02, 1.099 +/- 0.015 kg/l and 2.31 +/- 0.10 g/kg, respectively).
In spite of systematic differences among body composition models for the measurement of FFM and FM, changes in FFM and FM did not differ significantly among the models. Since there was no apparent effect of pregnancy or lactation on the postpartum composition of FFM, 2-component models of body composition are acceptable for use in postpartum women beyond the puerperium.
（1）比较基于总体水（TBW）、水下称重（UWW）、皮褶厚度（SF）、总体钾（TBK）、双能X线吸收法（DXA）和总体电导率（TOBEC）的身体成分二成分、三成分和四成分模型；（2）比较二成分、三成分和四成分模型估计的产后身体成分变化；（3）测试妊娠或哺乳对产后妇女去脂体重（FFM）的水合作用、密度和钾含量的影响。
产后3、6和12个月对身体成分进行纵向测量。
35名健康产后妇女，年龄30.2±3.5岁。
通过基于TBW、UWW、SF、TBK、DXA或TOBEC的二成分模型估计身体成分；基于TBW和UWW的三成分模型（富勒三成分模型、西里三成分模型）；以及基于TBW、UWW和骨矿物质含量的四成分模型（富勒四成分模型）。
不同身体成分模型之间存在系统差异，脂肪量（FM）估计值从低到高的排序如下：TOBEC、TBW、富勒三成分模型、西里三成分模型、富勒四成分模型、UWW、SF、TBK和DXA。除了根据TBW估计的3至6个月FFM和FM变化与SF、DXA和TOBEC不同外，各方法估计的FFM和FM变化无显著差异。产后3个月时，妊娠引起的FFM水合作用、密度和钾含量变化不明显（分别为0.73±0.02、1.099±0.015 kg/l和2.31±0.10 g/kg）。
尽管身体成分模型在测量FFM和FM方面存在系统差异，但各模型之间FFM和FM的变化无显著差异。由于妊娠或哺乳对产后FFM成分无明显影响，产后产褥期过后，身体成分二成分模型可用于产后妇女。
