TABLE 2.

Comparison of step length, step width, velocity, and phase proportions between the FAI group and control group during walking while crossing obstacles of different heights (mean ± SD).

Variables	Height	Group		P-value
		FAI	Control	Group	Height	Group × height
Step width (m)	0%	0.12 ± 0.03	0.13 ± 0.05	0.148	0.061	0.240
	10%	0.12 ± 0.03	0.15 ± 0.07
	20%	0.10 ± 0.04	0.14 ± 0.06
Step length (m)	0%	0.43 ± 0.04	0.44 ± 0.04	0.257	0.022*	0.862
	10%	0.45 ± 0.03	0.47 ± 0.03
	20%	0.45 ± 0.04	0.47 ± 0.02
Swing total speed (m/s)	0%	0.95 ± 0.14	0.99 ± 0.14	0.787	<0.001*abc	0.279
	10%	0.76 ± 0.13	0.75 ± 0.14
	20%	0.70 ± 0.11	0.71 ± 0.14
Swing pre speed (m/s)	0%	0.96 ± 0.13	0.99 ± 0.14	0.875	<0.001*abc	0.322
	10%	0.80 ± 0.12	0.79 ± 0.14
	20%	0.76 ± 0.11	0.76 ± 0.13
Swing obstacle speed (m/s)	0%	0.93 ± 0.14	0.98 ± 0.13	0.731	<0.001*abc	0.266
	10%	0.70 ± 0.14	0.69 ± 0.15
	20%	0.63 ± 0.12	0.64 ± 0.15
Swing post speed (m/s)	0%	0.93 ± 0.14	0.99 ± 0.13	0.718	<0.001*abc	0.138
	10%	0.72 ± 0.14	0.70 ± 0.15
	20%	0.66 ± 0.11	0.66 ± 0.14
Proportion of the preparation phase (%)	0%	59.04 ± 5.03	59.06 ± 5.99	0.229	<0.001*abc	0.336
	10%	50.05 ± 4.16	52.46 ± 4.20
	20%	47.84 ± 3.78	50.73 ± 3.52
Proportion of the execution phase (%)	0%	17.49 ± 3.04	15.56 ± 2.38	0.177	<0.001*ab	0.186
	10%	13.52 ± 1.61	13.81 ± 1.55
	20%	13.44 ± 2.03	12.57 ± 1.90
Proportion of the completion phase (%)	0%	23.47 ± 7.31	25.38 ± 7.46	0.585	<0.001*abc	0.253
	10%	36.43 ± 4.77	33.73 ± 4.68
	20%	38.72 ± 4.97	36.70 ± 4.48

Note: *: P < 0.05; ^a: Significant difference when obstacle height increased from 0% to 10%; ^b: Significant difference when obstacle height increased from 0% to 20%; ^c: Significant difference when obstacle height increased from 10% to 20%.

Abbreviation: FAI, Functional Ankle Instability.