Cornwall Mark W, McPoil Thomas G
Gait Research Laboratory, Department of Physical Therapy, Northern Arizona University, Flagstaff 86011, USA.
J Am Podiatr Med Assoc. 2003 Mar-Apr;93(2):142-9. doi: 10.7547/87507315-93-2-142.
The purpose of this study was to determine the reliability and validity of two center-of-pressure quantification methods. One hundred five individuals (33 men and 72 women) with a mean age of 26.7 years participated in phase 1 of the study. Two measures of the center-of-pressure pattern, the lateral-medial area index and the lateral-medial force index, were calculated from plantar pressure data collected on all subjects. Between-trial reliability of the two measurements was assessed using intraclass correlation coefficients. In phase 2, frontal plane motion of the rearfoot was recorded in 30 individuals. Pearson correlation coefficients were then calculated between the two center-of-pressure indices and the magnitude of rearfoot eversion obtained from each subject during walking. Intraclass correlation coefficient values ranged from 0.374 to 0.889 for the lateral-medial area index and from 0.215 to 0.905 for the lateral-medial force index. Pearson correlation coefficients between the two center-of-pressure indices and the rearfoot kinematic variables ranged from 0.050 to 0.165. The lateral-medial area index and the lateral-medial force index may have adequate between-trial reliability but are not related to the magnitude of frontal plane rearfoot eversion during the stance phase of walking.
本研究的目的是确定两种压力中心量化方法的可靠性和有效性。105名个体（33名男性和72名女性）参与了研究的第一阶段，平均年龄为26.7岁。根据所有受试者足底压力数据计算压力中心模式的两个指标，即内外侧面积指数和内外侧力指数。使用组内相关系数评估这两个测量值的试验间可靠性。在第二阶段，记录了30名个体后足在额状面的运动。然后计算两个压力中心指数与每个受试者在行走过程中获得的后足外翻幅度之间的Pearson相关系数。内外侧面积指数的组内相关系数值范围为0.374至0.889，内外侧力指数的组内相关系数值范围为0.215至0.905。两个压力中心指数与后足运动学变量之间的Pearson相关系数范围为0.050至0.165。内外侧面积指数和内外侧力指数可能具有足够的试验间可靠性，但与行走站立期后足在额状面外翻的幅度无关。
