“…These variables were assessed in previous studies [8,12,13] with good reliability and validity, making the scale, as described previously, the best visual scale currently available [13]. However, available studies, focused on this scale, have been developed mainly by the Edinburgh group [10][11][12]14]; and in the studies where different groups applied the scale, only specific aspects were addressed such as observer reliability [2,6], influence of experience on reliability [8] and responsiveness of the EVGS to surgical interventions [15]. Therefore, more information is still needed from different groups, to evaluate the role that the scale can have in the routine clinical assessment of gait even when 3D gait analysis is available.…”