Table 1 Biomechanical descriptors and their trends with stiffness

Hip

 Cross-leg diff. in max. hip height

   Cross-leg difference in stepwise maximum hip height

0.666

0.289

−

−

 Cross-leg RMS diff. hip angle

   Cross-leg root mean squared difference of stepwise hip angle trajectories

0.421

0.759

−

−

 Cross-leg RMS diff. hip moment

   Cross-leg root mean squared difference of stepwise hip moment trajectories

0.066

0.950

−

−

 Pelvic tilt variance

   Pelvic tilt variance

2e-4*

0.039

- 2.0

69.1

Knee

 Affected knee ROM

   Affected-side knee range of motion

2e-4*

0.177

−

−

 Affected knee peak flex. moment

   Affected-side peak knee flexion moment

6e-13*

0.381

−

−

 Affected knee peak ext. moment

   Affected-side peak knee extension moment

0.002

0.508

−

−

 Unaffected knee ROM

   Unaffected-side knee range of motion

0.653

0.930

−

−

 Unaffected knee peak early flex. angle

   Unaffected-side peak knee flexion angle in the first half of stance phase

2e-16*

0.426

−

−

 Unaffected knee peak early ext. moment

   Unaffected-side peak knee extension moment in the first half of stance phase

2e-8*

8e-3

8.2

72.0

 Cross-leg RMS diff. knee angle

   Cross-leg root mean squared difference of stepwise knee angle trajectories

0.451

0.092

−

−

 Cross-leg RMS diff. knee moment

   Cross-leg root mean squared difference of stepwise knee moment trajectories

0.546

0.110

−

−

 Cross-leg diff. in peak knee ext. moment

   Cross-leg difference of stepwise peak knee extension moments

0.036

0.584

−

−

Ankle

 Affected ankle peak DF angle

   Affected-side peak (prosthetic) ankle dorsiflexion angle

3e-33*

0.020

22.4

255

 Affected ankle ROM

   Affected (prosthetic) ankle range of motion

3e-37*

5e-3

40.2

215

 Affected ankle peak PF moment

   Affected-side peak (prosthetic) ankle plantar flexion moment

1e-10*

0.019

7.2

100

 Affected ankle peak power

   Affected-side peak (prosthetic) ankle power

7e-18*

0.334

−

−

 Unaffected ankle ROM

   Unaffected-side ankle range of motion

0.576

0.863

−

−

 Unaffected ankle peak PF moment

   Unaffected-side peak ankle plantar flexion moment

0.131

0.598

−

−

 Cross-leg RMS diff. ankle angle

   Cross-leg root mean squared difference of stepwise ankle angle trajectories

0.182

9e-4*

- 18.0

3.95

 Cross-leg RMS diff. ankle moment

   Cross-leg root mean squared difference of stepwise ankle moment trajectories

4e-4*

0.535

−

−

 Cross-leg diff. in peak ankle PF moment

   Cross-leg difference of stepwise peak ankle plantar flexion moments

1e-5*

0.167

−

−

 Cross-leg diff. in peak ankle power

   Cross-leg difference of stepwise peak ankle powers

0.099

0.991

−

−

Other

 Affected step prop. of total stride duration

   Affected-side step duration as a proportion of total stride duration

0.017

0.451

−

−

 Affected step prop. of total stride distance

   Affected-side step distance as a proportion of total stride distance

0.276

0.965

−

−