融合声音与运动传感器的步态分析技术的敏感性及信度研究

Sensibility and Reliability of the Gait Analysis System Based on the Sound and Motion Sensors

目的探讨融合声音与运动传感器的步态分析技术的可靠性及敏感性。方法选取47名受试者进行步态分析,其中包括22名偏瘫患者及25名健康受试者,对其运动学参数进行记录和比较,以检测该步态分析系统的敏感性。由一名评定者对两组受试者分别进行2次步态测试,采用相关系数进行重测信度比较。结果病例组与对照组受试者的步幅、步速、步频、摆动相时间、支撑相时间、双足支撑时间及踝关节角度等运动学参数比较,差异均具有统计学意义。应用融合声音与运动传感器的步态分析技术2次测量所得各项步态参数的组内相关系数均较高(0.901～0.996),提示重测信度好。结论融合声音与运动传感器的步态分析技术对于步行能力的评估具有较好的敏感性及稳定性。

Objective To investigate the reliability and sensitivity of the gait analysis system based on the sound and motion sensors.Methods 47 subjects were recruited in this gait analysis,including 22 stroke patients with hemiplegia and 25 healthy subjects.The gait parameters of all the subjects were recorded and compared to investigate the sensitivity of this system.The subjects were detected twice by the same doctor,and the intraclass correlation coefficient(ICC)was used to evaluate the reliability of the gait analysis system.Results The kinematic parameters(stride length,walking speed,walking frequency,stride period,stance duration,double support duration and the angle of ankle)of the two groups showed significant differences.ICCs values of the gait parameters ranged from 0.901 to 0.996,which suggested a good test-retest reliability.Conclusions The gait analysis system based on the sound and motion sensors has a good sensitivity and reliability.