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Youdas, J.W. et al.

James W. Youdas, John H. Hollman, Monica J. Aalbers, Holly N. Ahrenholz, Rebecca A. Aten, Joseph J. Cremers,

Agreement between the GAITRite walkway system and a stopwatch-footfall count method for measurement of temporal and spatial gait parameters.

OBJECTIVE: To determine the agreement for measurements of stride length, cadence, and walking speed obtained from the GAITRite system and the stopwatch-footfall count technique. DESIGN: Criterion standard. SETTING: Research laboratory in a physical therapy education program. PARTICIPANTS: Forty healthy volunteers (13 men, 27 women) without lower-extremity injury. INTERVENTIONS: Participants walked across a GAITRite mat with embedded pressure sensors at their self-selected walking speed. Simultaneously, an examiner used a stopwatch to record the elapsed time necessary to cross the mat and counted the number of complete footfalls. MAIN OUTCOME MEASURES: Walking speed, cadence, and stride-length measures were compared between the GAITRite system and the stopwatch-footfall count technique. RESULTS: Correlation coefficients comparing both systems were .97 for walking speed, .75 for cadence, and .85 for stride length. Ninety-five percent of the time we would expect the between-methods differences to range between .09 and -.05m/s for walking speed, between -1.5 and -24.3 steps/min for cadence, and between .01 and .37m for stride length. CONCLUSIONS: This study shows that the GAITRite and stopwatch-footfall count methods lack clinically acceptable agreement for the measurements of cadence and stride length in a group of healthy volunteers walking at their self-selected speeds. Clinicians who require precise measurement of cadence and stride length should consider using the GAITRite system instead of the stopwatch-footfall count technique.[1]

References

Agreement between the GAITRite walkway system and a stopwatch-footfall count method for measurement of temporal and spatial gait parameters. Youdas, J.W., Hollman, J.H., Aalbers, M.J., Ahrenholz, H.N., Aten, R.A., Cremers, J.J. Arch. Phys. Med. Rehabil (2006) [Pubmed]

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