Table I.

Median (and ranges) of spatiotemporal gait parameters

Parameter	Pre-surgery	Post-surgery	p-value
Velocity, m/s	0.75 (0.68–0.82)	1.07 (0.99–1.22)	< 0.001
Stride length, m	0.85 (0.76–0.92)	1.15 (1.11–1.19)	< 0.001
Stride time, s	1.11 (1.07–1.16)	1.07 (0.94–1.14)	0.02
Double support, %	24 (12–31)	24 (23–28)	0.94
Step width, m	0.23 (0.13–0.29)	0.18 (0.14–0.29)	0.08
Step length left, m	0.46 (0.42–0.51)	0.56 (0.52–0.60)	0.006
Step length right, m	0.38 (0.33–0.41)	0.59 (0.58–0.59)	< 0.001
Step time left, s	0.53 (0.50–0.58)	0.54 (0.44–0.580	0.03
Step time right, s	0.59 (0.54–0.59)	0.53 (0.50–0.56)	0.091