Table 1

Spearman correlation coefficients with 95% CIs between the AOFAS-AHS total score as well as the FFI-D total score, respectively, and selected gait parameters representing mobility in the ankle (six parameters) and the subtalar joint (five parameters) as well as the ankle osteoarthritis indicator parameter ankle maximum power generation during stance (W/kg), respectively

ParameterAOFAS-AHS total score
r (95% CI)
FFI-D total score
r (95% CI)
Hindfoot versus tibia maximum dorsiflexion during stance (°) 0.51 (−0.15 to 0.83) 0.16 (−0.40 to 0.66)
Hindfoot versus tibia ROM (plantarflexion/dorsiflexion) during gait cycle (°)0.53 (0.18 to 0.75)0.47 (0.00 to 0.78)
Hindfoot versus tibia ROM (inversion/eversion) during gait cycle (°) 0.55 (0.24 to 0.78) 0.55 (0.02 to 0.85)
Hindfoot versus tibia ROM (internal/external rotation) during gait cycle (°)0.41 (−0.06 to 0.78)0.51 (0.03 to 0.83)
Forefoot versus hindfoot maximum dorsiflexion during stance (°)−0.57 (−0.83 to 0.07)−0.36 (−0.72 to 0.3)
Forefoot versus hindfoot maximum plantarflexion during push-off phase (°) −0.64 (−0.87 to −0.25) −0.26 (−0.76 to 0.26)
Forefoot versus hindfoot ROM (adduction/abduction) during gait cycle (°) 0.63 (0.28 to 0.86) 0.57 (0.12 to 0.84)
Forefoot versus hindfoot ROM (supination/pronation) during gait cycle (°)0.45 (0.14 to 0.72) 0.52 (0.10 to 0.80)
Forefoot versus tibia ROM (adduction/abduction) during gait cycle (°)0.45 (0.05 to 0.77) 0.57 (0.21 to 0.79)
Forefoot versus tibia maximum plantarflexion during push-off phase (°) −0.61 (−0.88 to −0.29) −0.55 (−0.84 to −0.09)
Forefoot versus tibia ROM (plantarflexion/dorsiflexion) during gait cycle (°) 0.57 (0.13 to 0.87) 0.38 (−0.10 to 0.78)
Ankle maximum power generation during push-off phase (W/kg) 0.55 (0.18 to 0.84) 0.34 (−0.11 to 0.72)
  • Significant correlations (>0.5/<−0.5) are shown in bold.

  • AOFAS-AHS, Ankle-Hindfoot Scale of the American Orthopaedic Foot and Ankle Society; FFI-D, Foot Function Index; ROM, range of motion.