Fig. 4

Scatter and Bland–Altman plots of the clearance (A) and temporal (B) gait parameter for validity of both Visual3D (V3D) and Physilog® configurations during overground walking conditions. In the lower row the Y-axis of the plot corresponds to the difference between the two measurement systems (V3D minus Physilog®), while the X-axis is the average of the two measurements. Solid lines mark the average difference for the whole sample, while the dashed lines correspond to the 95% limits of agreement. Max. toe1 means the maximal height above the ground reached by the toe just after heel maximal clearance and Max. toe2 the maximal height above the ground reached by the toe just before heel contact. The values are based on the result of the left foot of the patient. The stance phase is defined as the period of time where the foot is in contact with the ground