Fig. 5

Two-dimensional scatter plots and box plots of the mean urethral displacement of the whole urethra. (a) All patients. (b) Patients with T1, T2, and T3/4 diseases, respectively. The left image (red) shows the displacement along the anteroposterior (AP) direction and the right image (blue) shows that along the left-right direction (LR). On the box plots, the center line in the box indicates the median, and the upper and lower lines of the box indicate the third and first quartiles, respectively. The maximum and minimum of the whisker indicate the “third quartile + 1.5×IQR” and the “first quartile + 1.5×IQR.” IQR, interquartile range. The distribution of the mean C-G discrepancy between the anteroposterior (AP) direction and left-right (LR) direction were compared by Mann-Whitney’s U test for all patients (a) and each T stage (b). A p-value less than 0.05 was considered statistically significant