Article

Commercially available instrumented treadmill systems that provide
continuous measures of temporospatial gait parameters have recently become
available for clinical gait analysis. This study evaluated the level of agreement
between temporospatial gait parameters derived from a new instrumented treadmill,
which incorporated a capacitance-based pressure array, with those measured by a
conventional instrumented walkway (criterion standard). METHODS: Temporospatial
gait parameters were estimated from 39 healthy adults while walking over an
instrumented walkway (GAITRite((R))) and instrumented treadmill system (Zebris)
at matched speed. Differences in temporospatial parameters derived from the two
systems were evaluated using repeated measures ANOVA models.
Pearson-product-moment correlations were used to investigate relationships
between variables measured by each system. Agreement was assessed by calculating
the bias and 95% limits of agreement. RESULTS: All temporospatial parameters
measured via the instrumented walkway were significantly different from those
obtained from the instrumented treadmill (P<.01). Temporospatial parameters
derived from the two systems were highly correlated (r, 0.79-0.95). The 95%
limits of agreement for temporal parameters were typically less than +/-2% of
gait cycle duration. However, 95% limits of agreement for spatial measures were
as much as +/-5cm. CONCLUSIONS: Differences in temporospatial parameters between
systems were small but statistically significant and of similar magnitude to
changes reported between shod and unshod gait in healthy young adults.
Temporospatial parameters derived from an instrumented treadmill, therefore, are
not representative of those obtained from an instrumented walkway and should not
be interpreted with reference to literature on overground walking.
CI - Copyright (c) 2012 Elsevier B.V. All rights reserved.

Langue : ANGLAIS