The test-retest reliability of gait kinematic data measured using a portable gait analysis system in healthy adults

• Published in: The Journal of Korean Academy of Physical Therapy Science Vol. 27; no. 3; pp. 25 - 34
• Main Authors: An, Jung-Ae, Byun, Kyung-Seok, Lee, Byounghee
• Format: Journal Article
• Language: English
• Published: 대한물리치료과학회 31.12.2020
• Subjects: 물리치료학
• ISSN: 2733-6441; 2733-645X
• DOI: 10.26862/jkpts.2020.12.27.3.25

Background: Gait analysis is an important measurement for health professionals to assess gait patterns related to functional limitations due to neurological or orthopedic conditions. The purpose of this study was to investigate the reliability of the newly developed portable gait analysis system (PGAS). Design: Cross-sectional design. Test-retest study. Methods: The PGAS study was based on a wearable sensor, and measurement of gait kinematic parameters, such as gait velocity, cadence, step length and stride length, and joint angle (hip, knee, and ankle) in stance and swing phases. The results were compared with a motion capture system (MCS). Twenty healthy individuals were applied to the MCS and PGAS simultaneously during gait performance. Results: The test-retest reliability of the PGAS showed good repeatability in gait parameters with mean intra-class correlation coefficients (ICCs) ranging from 0.840 to 0.992, and joint angles in stance and swing phase from 0.907 to 0.988. The acceptable test-retest ICC was observed for the gait parameters (0.809 to 0.961), and joint angles (0.800 to 0.977). Conclusion: The results of this study indicated that the developed PGAS showed good grades of repeatability for gait kinematic data along with acceptable ICCs compared with the results from the MCS. The gait kinematic parameters in healthy subjects can be used as standard values for adopting this PGAS. KCI Citation Count: 0