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Gait variability measures may represent different constructs.

机译：步态变异性量度可能代表不同的结构。

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Many measures of gait variability have been reported, but the degree to which such measures are associated and thus represent a common construct is inconclusive. The purpose of this paper is to establish construct validity of commonly used spatio-temporal footfall variability and trunk variability measures taking into account the effect of measurement error. Twenty-three older individuals, aged 80+/-5 years performed four repeated walks at preferred speed, 0.97+/-0.16m/s. Gait data were obtained by an electronic walkway and by trunk accelerometry. Of initially 13 variability measures, five satisfied a reliability criterion of ICC> or =0.80 and were included in a subsequent construct validity analysis. Of these, step length variability and step time variability did not correlate significantly, while step length variability correlated closely with anteroposterior interstep trunk variability, and step time variability with vertical interstep trunk variability. Mediolateral interstep trunk variability did not correlate significantly with any of the other measures. This finding supports the notion that this measure may represent still a different aspect of variability. Different gait variability measures representing different constructs should be included in gait analysis to enhance our understanding of variability in gait.
机译：已经报道了许多关于步态变异性的量度，但是这种量度的相关程度并因此代表一个共同的结构尚无定论。本文的目的是在考虑测量误差影响的情况下，建立常用时空落差变异性和躯干变异性度量的构造效度。 23个年龄在80 +/- 5岁的老年人以优选速度0.97 +/- 0.16m / s进行了四次重复步行。步态数据是通过电子走道和躯干加速度计获得的。在最初的13个变异性度量中，有5个满足ICC>或= 0.80的可靠性标准，并包含在随后的结构效度分析中。其中，步长变异性和步长时间变异性不显着相关，而步长变异性与前后脚间躯干变异性密切相关，步长时间变异性与步间垂直躯干变异性紧密相关。内侧外侧步间主干变异性与其他任何指标均无显着相关性。这一发现支持了这样一种观点，即该度量可能仍代表可变性的另一个方面。步态分析中应包括代表不同结构的不同步态变异性度量，以增强我们对步态变异性的理解。

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