通过生物电阻抗矢量分析评估自由生活老年人的营养状况。
Assessment of nutritional status in free-living elderly individuals by bioelectrical impedance vector analysis.
作者信息
Buffa Roberto, Floris Giovanni, Marini Elisabetta
出版信息
Nutrition. 2009 Jan;25(1):3-5. doi: 10.1016/j.nut.2008.07.014. Epub 2008 Oct 11.
OBJECTIVE
The aim of the present research was to examine bioelectrical vector changes in relation to nutritional status in a sample of healthy free-living elderly people.
METHODS
The study group consisted of 170 men and women 70 to 99 y of age. Anthropometric and bioelectrical (resistance and reactance, 50 kHz, 800 muA) measurements were taken. Bioelectrical impedance vector analysis was applied. Nutritional status was determined by the Mini-Nutritional Assessment. Bioelectrical characteristics of normal and undernourished individuals were compared statistically with Hotelling's T(2) test and graphically with 95% probability confidence ellipses.
RESULTS
The impedance and multidimensional approaches showed a clear association. Undernourished subjects had a smaller phase angle (men 5.2 +/- 1.3 versus 5.7 +/- 1.0 degrees, P = 0.027; women 5.0 +/- 1.0 versus 5.4 +/- 0.9 degrees, P = 0.065) than normally nourished subjects.
CONCLUSION
Bioelectrical impedance vector analysis represents a promising indicator of nutritional status, suitable in screening programs and clinical practice.
目的
本研究旨在检测健康自由生活的老年人样本中与营养状况相关的生物电向量变化。
方法
研究组由170名年龄在70至99岁的男性和女性组成。进行了人体测量和生物电测量（电阻和电抗，50千赫，800微安）。应用生物电阻抗向量分析。通过微型营养评定法确定营养状况。正常和营养不良个体的生物电特征采用霍特林T²检验进行统计学比较，并通过95%概率置信椭圆进行图形比较。
结果
阻抗和多维度方法显示出明显的关联。营养不良受试者的相位角比营养正常受试者小（男性5.2±1.3度对5.7±1.0度，P = 0.027；女性5.0±1.0度对5.4±0.9度，P = 0.065）。
结论
生物电阻抗向量分析是营养状况的一个有前景的指标，适用于筛查项目和临床实践。
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