Yoon Jung Joong, Yoon Tae Sik, Shin Bo Mi, Na Eun Hye
Department of Rehabilitation Medicine, School of Medicine, Ewha Womans University, Seoul 158-710, Korea.
Ann Rehabil Med. 2012 Feb;36(1):112-8. doi: 10.5535/arm.2012.36.1.112. Epub 2012 Feb 29.
To identify factors affecting test results of the quiet standing balance evaluation conducted by posturography and to investigate the standardized method by comparing results according to feet width.
The study cohort consisted of 100 healthy individuals. We assessed the quiet standing balance of subjects by using 3 different methods: standing on a force plate with feet width the same as shoulder width (test 1); with feet width the same as half the shoulder width (test 2); with feet width determined by the subject's comfort (test 3). Subjects underwent each test with their eyes open and closed for 30 seconds each time. Parameters for measuring standing balance included the mean mediolateral and anteroposterior extent, speed, and the velocity moment of center of pressure (COP) movement.
All parameters showed better results when the subject's eyes were open rather than closed, and the mean AP extent and speed increased as the age of the subjects increased (p<0.01). However, there was no significant correlation between height and the study parameters, and no differences between men and women. Mean mediolateral extent and speed were significantly longer and faster in test 1 compared with tests 2 and 3 (p<0.01). The results of test 2 were better than the results of test 3, but the difference was not statistically significant.
COP movements increased with age and when subjects closed their eyes in an evaluation of quiet standing balance conducted by posturography. Gender and height did not affect results of the test. We suggest that an appropriate method for conducting posturography is to have the subject stand on a force plate with their feet width the same as half the shoulder width, because this posture provided relatively accurate balance capacity.
确定影响姿势描记法进行安静站立平衡评估测试结果的因素，并通过比较不同脚间距的结果来研究标准化方法。
研究队列由100名健康个体组成。我们使用3种不同方法评估受试者的安静站立平衡：双脚间距与肩同宽站在测力板上（测试1）；双脚间距为肩宽的一半（测试2）；双脚间距由受试者自行选择舒适的宽度（测试3）。受试者每次睁眼和闭眼各进行30秒的每项测试。测量站立平衡的参数包括平均内外侧和前后方向的范围、速度以及压力中心（COP）移动的速度矩。
所有参数在受试者睁眼时比闭眼时表现更好，并且平均前后范围和速度随着受试者年龄的增加而增加（p<0.01）。然而，身高与研究参数之间没有显著相关性，男女之间也没有差异。与测试2和3相比，测试1中的平均内外侧范围和速度明显更长、更快（p<0.01）。测试2的结果优于测试3，但差异无统计学意义。
在姿势描记法进行的安静站立平衡评估中，COP移动随着年龄增长以及受试者闭眼而增加。性别和身高不影响测试结果。我们建议进行姿势描记法的合适方法是让受试者双脚间距为肩宽的一半站在测力板上，因为这种姿势能提供相对准确的平衡能力。
