Factor

Difference

p-value of factor

Preoperative varus >5 degrees

+0.8 points

p = 0.0096

Flexion <105 degrees

−2.3 points

p < 0.0001

Flexion contracture >6 degrees

−2.4 points

p = 0.0006

PCL excision

−3.1 points

p = 0.0259

Tibial size (vs. 85 mm)

p = 0.0080

65 mm

−1.0 points

p = 0.0222

70 mm

−0.8 points

p = 0.0223

80 mm

−0.3 points

p = 0.4890

Osteonecrosis

−4.9 points

p = 0.0077