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Table 3 Preoperative and postoperative comparison of clinical and radiological outcomes

From: Open-wedge high tibial osteotomy for spontaneous osteonecrosis of the medial tibial plateau shows excellent clinical outcomes

 

Pre-operation

Post-operation

P value

Ext. angle (°)

−4.2 (4.2, −10.0–0.0)

−0.8 (2.0, −5.0–0.0)

0.0201

Flex. angle (°)

134.2 (4.7, 125.0–140.0)

141.3 (5.3, 135.0–150.0)

0.0021

JOA score (points)

63.3 (12.3, 40.0–85.0)

95.0 (4.8, 85.0–100.0)

< 0.001

OKS (points)

27.4 (7.8, 15.0–37.0)

42.6 (4.1, 36.0–48.0)

< 0.001

FTA (°)

179.3 (2.3, 177.0–184.0)

169.1 (1.5, 166.2–172.0)

< 0.001

WBLR (%)

24.0 (10.7, 0.6–37.9)

66.3 (6.7, 58.0–77.6)

< 0.001

PTS (°)

9.0 (1.7, 7.1–13.0)

9.1 (1.9, 6.6–13.3)

n.s.

MPTA (°)

83.1 (1.7, 81.2–85.0)

92.6 (2.1, 89.7–94.6)

< 0.001

  1. Mean (standard deviation, range)
  2. Abbreviations: n.s. Non-significant, JOA Japanese Orthopedic Association, OKS Oxford knee score, FTA Femorotibial angle, WBLR Weight-bearing line ratio, PTS Posterior tibial slope, MPTA Medial proximal tibial angle