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Table 2 Pre- and post-operative clinical scores and range of movement

From: Salvage of severe knee osteoarthritis: efficacy of tibial condylar valgus osteotomy versus open wedge high tibial osteotomy

  HTO TCVO SHTO STCVO
VAS score (points)
 Pre-operative 5.9 ± 1.3 6.0 ± 1.6 6.3 ± 1.4 6.9 ± 1.4
 6-month post-operative 3.9 ± 1.4 a 3.4 ± 1.2 a 4.3 ± 1.1 a 4.0 ± 1.1 a
 12-month post-operative 2.4 ± 1.4 a,b 2.1 ± 1.3 a,b 3.3 ± 1.2 a,b,c 1.9 ± 1.0 a,b
 24-month post-operative 2.6 ± 1.5 a,b 2.1 ± 1.2 a,b 3.5 ± 1.4 a,e 2.2 ± 0.9 a,b
HSS score (points)
 Pre-operative 70.3 ± 6.2 65.9 ± 8.3 67.5 ± 4.8 63.2 ± 8.1
 6-month post-operative 77.3 ± 4.9 a 76.8 ± 6.5 a 73.8 ± 2.2 a 76.2 ± 8.6 a
 12-month post-operative 82.7 ± 6.0 a,b 86.2 ± 7.2 a,b 78.6 ± 2.8 a,b,c 85.9 ± 7.9 a,b
 24-month post-operative 81.4 ± 6.6 a,b 87.3 ± 7.3 a,b 75.3 ± 3.3 a,e 86.7 ± 7.4 a,b
Range of movement
 Pre-operative
  Extension angle (°) − 3.7 ± 3.2 − 3.6 ± 1.8 − 3.4 ± 3.1 − 3.4 ± 2.1
  Flexion angle (°) 133.9 ± 9.8 d 123.6 ± 12.6 131.9 ± 8.2 d 117.7 ± 12.9
 24-month post-operative
  Extension angle (°) − 3.0 ± 1.6 —3.5±2.0 − 3.0 ± 2.0 − 3.5 ± 2.5
  Flexion angle (°) 134.9 ± 8.1 134.9±10.0 a 132.9 ± 8.5 135.3 ± 10.3 a
  1. VAS Visual analog scale, HSS Hospital for Special Surgery, STCVO group / SHTO group the knee with pre-operative femorotibial angle (FTA) ≥ 185°.
  2. aP < 0.05 compared to that pre-operatively
  3. bP < 0.05 compared to that 6-month post-operatively
  4. cP < 0.05 compared to that 12 months after TCVO
  5. dP < 0.05 compared to that before TCVO
  6. eP < 0.05 compared to that 24 months after TCVO