Abstract

Purpose The purpose of this study was to examine test–retest reliability of seven selected temporal and spatial gait parameters and asymmetry measures in children with cerebral palsy. Method Seventeen children with CP between 3 and 13 years of age walked at three different speeds across an electronic walkway of 5.2 m. The tests were repeated after approximately 25 min. The scores were normalized to a walking speed of 1.1 m/s to avoid the confounding effect of gait speed on speed dependent gait parameters. Intraclass correlation coefficients (ICC 1,1 and ICC 3,1) with 95% confidence intervals, within-subject standard deviation ( S w) and smallest detectable difference (SDD) were calculated. Results The relative reliability of cadence, step length, stride length and single stance time was high to excellent (ICC 1,1 between 0.73 and 0.95), while it was poor for step width (ICC 1,1 = 0.27 and 0.35). The relative reliability for two calculated asymmetry measures were high for the step length index (ICC 1,1 = 0.82) and moderate for the single stance time index (ICC 1,1 = 0.49). The absolute reliability values for all gait parameters are reported. Conclusions Five of seven gait parameters measured by an electronic walkway and normalized to a common walking speed, appear to be highly repeatable in a short-term time span in children with CP who were able to walk without assistive walking devices, provided sufficient cognitive function.

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