Background

Plantar pressure measurement has been proven to produce crucial information for gait analysis. Socks with integrated textile pressure sensors are a promising tool for non-obtrusive plantar pressure acquisition and monitoring.

Research question

Can the DAid Pressure Socks System be employed for the measurement of plantar pressure and temporal parameters during walking?

Method

Plantar pressure measurement was acquired simultaneously by the DAid Pressure Socks System (DPSS) and Pedar® insole measurement system for a normal walking gait of 17 volunteers. The measurement from both systems was processed and gait temporal parameters were calculated. The calculated temporal parameters included stride time, step time, stance time, swing time, single support time, double support time, and cadence. The Intraclass Correlation Coefficient (ICC) was calculated to evaluate the agreement between the plantar pressure measurement and temporal parameters obtained from both systems.

Results

For plantar pressure measurement, excellent agreement (ICC > 0.90) was achieved in approximately 23 % cases, while in roughly 37 %, 27 %, and 13 % cases the agreement was good (ICC > 0.75), moderate (ICC > 0.50), and poor (ICC < 0.50), respectively. The mean relative differences (as a percentage) between the temporal parameter values calculated from the measurement of both systems were 0.80 % (stride time), 3.06 % (step time), 3.15 % (stance time), 5.08 % (swing time / opposite single support time), 14.47 % (double support time), and 0.78 % (cadence).

Significance

The ICC result calculated for the plantar pressure measurement indicated a reasonable agreement between both systems. Additionally, the relatively low mean difference was observed for 5 out of 6 calculated temporal gait parameters. Consequently, the presented DPSS could be considered as a substitute for the commercial gait analysis tools for applications that do not require great accuracy of the absolute plantar pressure measurement.

中文翻译：

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DAID压力袜系统：性能评估

背景

足底压力测量已被证明可为步态分析提供重要信息。带有集成式纺织品压力传感器的袜子是用于非引人注目的足底压力采集和监测的有前途的工具。

研究问题

DAID压力袜系统可以在步行过程中用于测量足底压力和时间参数吗？

方法

足底压力测量是通过DAid压力袜系统（DPSS）和Pedar®鞋垫测量系统同时进行的，用于17名志愿者的正常步态。处理来自两个系统的测量并计算步态时间参数。计算出的时间参数包括步幅时间，踏步时间，站姿时间，挥杆时间，单支撑时间，双支撑时间和节奏。计算类内相关系数（ICC）以评估足底压力测量值与从两个系统获得的时间参数之间的一致性。

结果

对于足底压力测量，在约23％的情况下达到了极好的一致性（ICC> 0.90），而在大约37％，27％和13％的情况下，一致性良好（ICC> 0.75），中等（ICC> 0.50），和差（ICC <0.50）。从两个系统的测量结果计算得出的时间参数值之间的平均相对差异（以百分比表示）分别为0.80％（步幅时间），3.06％（步长时间），3.15％（站立时间），5.08％（摆动时间/相反）单次支持时间），14.47％（两次支持时间）和0.78％（节奏）。

意义

为足底压力测量而计算的ICC结果表明两个系统之间的合理协议。此外，在6个计算出的时间步态参数中，有5个观察到了相对较低的平均差异。因此，对于不需要绝对足底压力测量精度非常高的应用，所提出的DPSS可以被认为是商业步态分析工具的替代品。