TABLE 3.

The test-retest reliability of kinematic parameters under three conditions when descending stairs.

		Firs session	Secon session	ICC	95% CI	r	P
Single task	Step cadence (step/min)	109.1 ± 16.1	109.2 ± 16.6	0.956	0.909–0.978	0.916	<0.001
	Step speed (m/s)	0.56 ± 0.08	0.55 ± 0.09	0.878	0.750–0.940	0.785	<0.001
	Step length(m)	0.63 ± 0.02	0.63 ± 0.02	0.745	0.478–0.876	0.597	<0.001
	Step width(m)	0.07 ± 0.04	0.07 ± 0.04	0.795	0.580–0.900	0.660	<0.001
Cognitive task	Step cadence	90.4 ± 19.4	91.9 ± 19.8	0.944	0.886–0.973	0.895	<0.001
	Step speed (m/s)	0.48 ± 0.10	0.47 ± 0.10	0.932	0.861–0.967	0.873	<0.001
	Step length(m)	0.62 ± 0.02	0.62 ± 0.02	0.710	0.597–0.885	0.396	0.025
	Step width(m)	0.08 ± 0.03	0.08 ± 0.04	0.685	0.354–0.846	0.528	0.002
Manual task	Step cadence	91.4 ± 13.7	93.6 ± 15.4	0.925	0.846–0.963	0.866	<0.001
	Step speed (m/s)	0.47 ± 0.08	0.47 ± 0.08	0.779	0.548–0.892	0.639	<0.001
	Step length(m)	0.62 ± 0.02	0.62 ± 0.02	0.305	−4.25–0.661	0.185	0.310
	Step width(m)	0.06 ± 0.04	0.06 ± 0.03	0.661	0.306–0.835	0.500	0.004