Passive Posterior Tibial Subluxation on Routine Knee MRI as a Secondary Sign of PCL Tear

Table 3

Comparison of midmedial and midlateral compartment tibial translation measured on MRI.

Measurements	No injury	PCL tear	Difference	Statistical significance (P)
Midmedial compartment tibial translation (mm) ± SD	+0.03 ± 1.37	+2.93 ± 3.00	+2.90	0.002^*
Reader 1	+0.04 ± 1.46	+2.99 ± 2.95	+2.95	0.001^*
Reader 2	+0.02 ± 1.60	+2.87 ± 3.15	+2.85	0.006^*
Midlateral compartment tibial translation (mm) ± SD	−0.17 ± 1.71	−0.57 ± 2.05	−0.75	0.355
Reader 1	−0.16 ± 2.18	−0.52 ± 3.71	−0.67	0.396
Reader 2	−0.21 ± 1.77	−0.63 ± 2.93	−0.83	0.375

Statistically significant difference.
Positive (+) values indicate posterior translation of the tibia relative to the femur.
Negative (−) values indicate anterior translation of the tibia relative to the femur.