14 July 2014 : Original article
Agreement Between the Spatio-Temporal Gait Parameters From Treadmill-Based Photoelectric Cell and the Instrumented Treadmill System in Healthy Young Adults and Stroke PatientsMyungmo LeeBCE, Changho SongADE, Kyoungjin LeeAD, Doochul ShinBEF, Seungho ShinCEF
Med Sci Monit 2014; 20:1210-1219
BACKGROUND: Treadmill gait analysis was more advantageous than over-ground walking because it allowed continuous measurements of the gait parameters. The purpose of this study was to investigate the concurrent validity and the test-retest reliability of the OPTOGait photoelectric cell system against the treadmill-based gait analysis system by assessing spatio-temporal gait parameters.
MATERIAL AND METHODS: Twenty-six stroke patients and 18 healthy adults were asked to walk on the treadmill at their preferred speed. The concurrent validity was assessed by comparing data obtained from the 2 systems, and the test-retest reliability was determined by comparing data obtained from the 1st and the 2nd session of the OPTOGait system.
RESULTS: The concurrent validity, identified by the intra-class correlation coefficients (ICC [2, 1]), coefficients of variation (CVME), and 95% limits of agreement (LOA) for the spatial-temporal gait parameters, were excellent but the temporal parameters expressed as a percentage of the gait cycle were poor. The test-retest reliability of the OPTOGait System, identified by ICC (3, 1), CVME, 95% LOA, standard error of measurement (SEM), and minimum detectable change (MDC95%) for the spatio-temporal gait parameters, was high.
CONCLUSIONS: These findings indicated that the treadmill-based OPTOGait System had strong concurrent validity and test-retest reliability. This portable system could be useful for clinical assessments.
Keywords: Electric Power Supplies, Exercise Test - instrumentation, Gait, Reproducibility of Results, Stroke - physiopathology, Time Factors, young adult
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