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  • Title: The validity and reliability of the GAITRite system's measurements: A preliminary evaluation.
    Author: McDonough AL, Batavia M, Chen FC, Kwon S, Ziai J.
    Journal: Arch Phys Med Rehabil; 2001 Mar; 82(3):419-25. PubMed ID: 11245768.
    Abstract:
    OBJECTIVE: To compare the concurrent validity and reliability of the GAITRite computerized gait analysis system with validated paper-and-pencil and video-based methods. DESIGN: Within-groups, repeated-measures design. SETTING: Research laboratory in a physical therapy education program. PARTICIPANT: One healthy woman, age 27 years. INTERVENTIONS: A subject walked across the walkway of the GAITRite system at various walking rates and degrees of step symmetry for 2 of the 3 analyses. Paper placed over the walkway enabled concurrent paper-and-pencil analysis. The subject was concurrently videotaped from the side. For the other analysis, a stride simulator with known step and stride lengths was applied to the walkway to simulate 2 steps and 1 stride. MAIN OUTCOME MEASURES: Cadence, walking speed, right and left step and stride lengths, and right and left step times. RESULTS: Excellent paper-and-pencil and GAITRite correlations (intraclass correlation coefficient [ICC] > 95) for spatial measures and excellent video-based and GAITRite correlations (ICC > 93) for temporal measures were found. GAITRite measures of step lengths and times were reliable in both walkway center and left-of-center measurements. CONCLUSIONS: Based on this data, GAITRite is a valid and reliable tool for measuring selected spatial and temporal parameters of gait.
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