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Gait Features
SI parameters [%]
Multiple regression model
F-value
p-value
\({R}^{2}\)
\(Adjusted {R}^{2}\)
Spatiotemporal characteristics
Step length
\({SI}_{SL}=-0.45{VAF}_{AS}+0.54{RF}_{AS}\)
8.26
< 0.01
56.0%
49.2%
Step time
–
–
–
–
–
Limb kinematics
Leg extension angle
\({SI}_{LEA}=0.63{RF}_{AS}\)
9.16
< 0.01
39.6%
35.2%
Limb length
\({SI}_{LL}=0.55{VAF}_{AS,3}\)
5.96
< 0.05
29.9%
24.8%
Footpath area
\({SI}_{FPA}=0.60{VAF}_{AS,3}\)
7.73
< 0.05
35.6%
31.0%
Joint kinematics (sagittal plane)
Hip flex/ex
\({SI}_{Hip,FE}=0.70{RF}_{US}\)
14.0
< 0.01
50.0%
46.4%
Knee flex/ex
\({SI}_{Knee,FE}=0.64{VAF}_{AS,3}\)
9.91
< 0.01
41.4%
37.3%
Ankle dorsi/plantar
–
–
–
–
–
Joint kinematics (other planes)
Hip abd/add
\({SI}_{Hip,AA}=0.48{VAF}_{US,4}+0.48{VL}_{AS}\)
6.08
< 0.05
48.3%
40.4%
Hip int/ext ro
\({SI}_{Hip,IE}=-0.62{TA}_{US}\)
8.93
< 0.01
38.9%
34.6%
SI symmetry index, SL step length, LEA leg extension angle, LL limb length, FPA footpath area, Hip, FE hip flexion/extension, Hip,AA hip abduction/adduction, Hip,IE hip internal/external rotation, Knee,FE knee flexion/extension, VAF variability accounted for, RF rectus femoris, VL vastus lateralis, TA tibialis anterior
