Fig. 6
Curve of mean (± standard deviation) interpolated data of the 3D shift. (a 1-3): 3D shift of the sagittal plane; (b 1-3): 3D shift of the axial plane; (c 1-3): 3D shift of the coronal plane; (a 2-c2): 3D shift was normalized to the transepicondylar axis (TEA) and expressed as a percentage of the TEA; (a 3-c3): 3D shift was normalized to the full extension. The trends of 3D shiftsagittal, 3D shiftsagittal normalized to the TEA, and 3D shiftsagittal normalized to the full extension were consistent between the two groups (P = 0.244, P = 0.698, P = 0.962, respectively). The trends of 3D shiftaxial, 3D shiftaxial normalized to the TEA, and 3D shiftaxial normalized to the full extension were consistent between the two groups (P = 0.986, P = 0.637, P = 0.590, respectively). The trends of 3D shiftcoronal and 3D shiftcoronal normalized to the full extension were consistent between the two groups (P = 0.053, P = 0.903, respectively). The trends of 3D shiftcoronal normalized to the TEA were different between the two groups (P = 0.003)