健康活跃老年女性的下肢和全身组织成分评估
Lower-limb and whole-body tissue composition assessment in healthy active older women.
作者信息
Rance Mélanie, Morio Béatrice, Courteix Daniel, Bedu Mario, Van Praagh Emmanuel, Duché Pascale
机构信息
Laboratory of Exercise Biology, Blaise Pascal and Auvergne Universities, Clermont-Ferrand, France.
出版信息
Ann Hum Biol. 2006 Jan-Feb;33(1):89-99. doi: 10.1080/03014460500446319.
AIM
The study evaluated, in active elderly women, the accuracy and bias of anthropometry and bioelectrical impedance analysis (BIA) for lower-limb and whole-body tissue composition measures using dual-energy X-ray absorptiometry (DXA) as the criterion method.
METHODS
Nineteen individuals (66.1 +/- 4.2 years) participated in the study. Whole-body fat mass (FM) and fat-free mass (FFM) were measured by anthropometry, BIA and DXA. Lower-limb volume (LLV) and lower-limb FFM (LLFFM) were assessed by anthropometry and DXA.
RESULTS
LLV and LLFFM were significantly overestimated by anthropometry vs. DXA (p < 0.05 and p < 0.001, respectively) but significant relationships were observed [coefficient of determination (R(2)) > 0.25, p < 0.05]. No significant difference was observed between FM(A) (where (A) stands for anthropometry) vs. FM(DXA) and FFM(A) vs. FFM(DXA) and significant relationships were observed [R(2) = 0.93, p < 0.001, coefficient of variation (CV) = 7.3%; and R(2) = 0.85, p < 0.001, CV = 4.4%, respectively]. No significant difference was observed between FM(BIA) and FM(DXA) and a significant relationship was observed (R(2) = 0.80, p < 0.001, CV = 11.6%). FFM was significantly underestimated by BIA vs. DXA (p < 0.01).
CONCLUSIONS
In active elderly women, (i) compared with DXA, anthropometry overestimates LLV and LLFFM; (ii) anthropometry can be an accurate method for assessing whole-body composition; and (iii) despite a non-significant bias for the FM measurement, the BIA tends to overestimate FM and underestimate FFM.
目的
本研究以双能X线吸收法（DXA）作为标准方法，评估活跃老年女性中人体测量学和生物电阻抗分析（BIA）用于测量下肢及全身组织成分的准确性和偏差。
方法
19名个体（66.1±4.2岁）参与了本研究。通过人体测量学、BIA和DXA测量全身脂肪量（FM）和去脂体重（FFM）。通过人体测量学和DXA评估下肢体积（LLV）和下肢去脂体重（LLFFM）。
结果
与DXA相比，人体测量学显著高估了LLV和LLFFM（分别为p<0.05和p<0.001），但观察到显著相关性[决定系数（R²）>0.25，p<0.05]。FM（A）（其中（A）代表人体测量学）与FM（DXA）之间以及FFM（A）与FFM（DXA）之间未观察到显著差异，但观察到显著相关性[R² = 0.93，p<0.001，变异系数（CV）= 7.3%；以及R² = 0.85，p<0.001，CV = 4.4%，分别]。FM（BIA）与FM（DXA）之间未观察到显著差异，但观察到显著相关性（R² = 0.80，p<0.001，CV = 11.6%）。与DXA相比，BIA显著低估了FFM（p<0.01）。
结论
在活跃老年女性中，（i）与DXA相比，人体测量学高估了LLV和LLFFM；（ii）人体测量学可以是评估全身成分的准确方法；（iii）尽管FM测量存在不显著的偏差，但BIA倾向于高估FM并低估FFM。
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