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Table 6 Comparisons of outcomes between osteoarthritis and osteonecrosis

From: Return to sports activity after opening wedge high tibial osteotomy in patients aged 70 years and older

   OA ON *P value
(n = 42) (n = 32)
Age   68.7 ± 8.0 67.7 ± 8.1 0.81
Knee score Preop 57.1 ± 12.8 57.5 ± 15.5 0.72
Postop 83.9 ± 10.1 83.8 ± 10.5 0.86
Function score Preop 67.6 ± 12.0 63.4 ± 9.5 0.15
Postop 86.5 ± 13.0 89.4 ± 11.3 0.08
sFTA Preop 181.8 ± 2.5 180.1 ± 2.0 0.24
Postop 170.9 ± 3.1 172.0 ± 2.6 0.55
%MAD Preop 18.9 ± 11.5 24.8 ± 11.4 0.89
Postop 64.8 ± 10.7 63.3 ± 11.1 0.62
Tegner activity scale Preop 3.1 ± 1.9 3.0 ± 1.8 0.54
Postop 2.7 ± 1.5 2.6 ± 1.6 0.88
Preop. total participation in sports, n (%) 32 (76.2) 27 (84.4) 0.39
RTS, n (%)   29 (90.6) 26 (96.3) 0.21
Preop. impact level, n High 7 5  
  Intermediate 4 1  
  Low 21 21 0.91
Postop. impact level, n High 4 3  
  Intermediate 2 0  
  Low 29 24 0.8
  1. OA osteoarthritis, ON osteonecrosis, sFTA standing femorotibial angle, MAD mechanical axis deviation, RTS return to sports
  2. The values are given as mean ± standard deviation