Yagi K
Nihon Jibiinkoka Gakkai Kaiho. 1989 Jun;92(6):899-908. doi: 10.3950/jibiinkoka.92.899.
Posturography is not a clearly defined examination. Recently a number of parameters can be obtained in stabilometry by means of computers. To evaluate each parameter and to decide its normal range, subject's age must be considered. The age-related factors found in stabilometry were studied in terms of both multiple regression analysis and cluster analysis. The parameters used in this study were as follows: the area of an ellipse for rejection and of the figure displayed on an X-Y recorder, the maximum width on both the X axis (left and right direction) and the Y axis (anterior and posterior direction), the total length and the sum of excursion in each direction, the root mean square, the velocity, the acceleration, and the averaged frequency of body sway in both X and Y directions. One hundred normal subjects, aged from the second to sixth decade, including 10 males and 10 females in each decade, were tested. Each subject was asked to stand on a platform in Romberg's position for 60 seconds with both eyes open and closed. The significant parameters to predict age, which were determined by multiple regression analysis, were as follows (P less than 0.05): the averaged frequency in the Y direction with eyes closed, the maximum width in the X direction with eyes open, the area of the ellipse for rejection and of the figure with eyes closed, the maximum width in the Y direction and the area of the ellipse and the velocity in the X direction with eyes open. All test subjects were successfully classified into two groups by cluster analysis. One was the younger group aged less than 40 years and the other was the older group not younger than 40-year-old. However, the difference between with eyes open and with eyes closed was not significant (P less than 0.01) as regards the parameters of root mean square and averaged frequency in both sexes and at every decade. The difference between both sexes was supposed to be significant in the Y direction in the younger group and in the X direction in the older one.
姿势描记法并非一项定义明确的检查。近来，通过计算机可在稳定测量法中获取若干参数。为评估每个参数并确定其正常范围，必须考虑受试者的年龄。从多元回归分析和聚类分析两方面对稳定测量法中发现的与年龄相关的因素进行了研究。本研究中使用的参数如下：排除椭圆的面积以及在X - Y记录器上显示图形的面积、X轴（左右方向）和Y轴（前后方向）上的最大宽度、每个方向上的总长度和偏移总和、均方根、速度、加速度以及X和Y方向上身体摆动的平均频率。测试了100名年龄在二十至六十岁之间的正常受试者，每个十年组包括10名男性和10名女性。要求每个受试者在睁眼和闭眼状态下以Romberg姿势站在平台上60秒。通过多元回归分析确定的预测年龄的显著参数如下（P小于0.05）：闭眼时Y方向的平均频率、睁眼时X方向的最大宽度、闭眼时排除椭圆的面积和图形的面积、Y方向的最大宽度以及睁眼时椭圆的面积和X方向的速度。通过聚类分析，所有测试对象成功分为两组。一组是年龄小于40岁的较年轻组，另一组是年龄不小于40岁的较年长组。然而，就均方根和平均频率参数而言，在各个十年组以及男女两性中，睁眼和闭眼之间的差异均不显著（P小于0.01）。在较年轻组中，预计两性在Y方向上存在显著差异；在较年长组中，预计在X方向上存在显著差异。
