Zahn L, Freund R, Hoppe K, Pisarchuk K L, Augustin W
Central Institute of Nutrition in Potsdam-Rehbrücke, Federal Republic of Germany.
Nahrung. 1991;35(6):581-90. doi: 10.1002/food.19910350605.
Aimed to the construction of a prediction equation for estimations of lipid content from animal water content body composition was determined by whole body analysis of male rats (1) given access, ad libitum, to a commercial standard diet (n = 144; ranging from 60 to 600 g in weight, and from the 4th to the 34th week of age), and (2) showing striking variations with regard to nutritional state, dietary history, enlarged fat deposition, genetic origin, intestinal microbial status, and advanced age (n = 75). It was shown that a unique coefficient of water content in lipid-free body mass does not exist. The results of statistical analysis for the grouped values of percentage body dry matter (x) and percentage body lipid (y) indicate that the latter can be estimated accurately from body water content directly determined by the use of the quadratic regression equation y = -0.2864 x +0.01615 x2 with a standard deviation of the procedure Sy = +/- 1.40. This prediction equation is valid for a wide developmental span even under highly different experimental states. Differences between the calculated body lipid contents vs. analytically determined values are smaller than by using a linear regression equation or coefficient(s) of hydration of lipid-free body mass.
旨在构建一个根据动物含水量估算脂质含量的预测方程，通过对雄性大鼠进行全身分析来确定身体组成：（1）随意给予标准商业饮食（n = 144；体重60至600克，年龄4至34周）；（2）在营养状态、饮食史、脂肪沉积增加、遗传来源、肠道微生物状态和老龄方面表现出显著差异（n = 75）。结果表明，无脂体重中不存在独特的含水量系数。对身体干物质百分比（x）和身体脂质百分比（y）的分组值进行统计分析的结果表明，后者可通过使用二次回归方程y = -0.2864x + 0.01615x²从直接测定的身体含水量准确估算，该方法的标准偏差Sy = +/- 1.40。即使在高度不同的实验状态下，该预测方程在广泛的发育范围内也有效。计算得到的身体脂质含量与分析测定值之间的差异小于使用线性回归方程或无脂体重水合系数时的差异。
