Correlation of foot radiographs with foot function as analyzed by plantar pressure distribution

The goal of this study was to correlate radiographic measurements to the dynamic plantar pressure of the residual clubfoot. This was done by comparing radiographs and EMED plantar pressure results in 61 idiopathic clubfeet in 39 children at an average of 8 years after complete subtalar release. Radiographic measures were obtained using the standard method outlined by Simons, and pressure data were collected for eight regions of the foot. Pearson correlation analysis was performed and the most significant correlation was found between the calcaneal/first metatarsal angle in the lateral radiographic view (r = 0.72) and the midfoot contact area. In the anteroposterior view there was mild correlation between the talus/first metatarsal angle and both the peak pressure and plantar contact area. The results of this study indicate that radiographs used in concert with dynamic plantar pressure analysis will provide a more complete assessment of the corrected clubfoot.