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Table 2 The comparison of preoperative and postoperative function outcomes and limb alignment

From: Intra-articular opening wedge osteotomy for varus ankle arthritis with computer-assisted planning and patient-specific surgical guides: a retrospective case series

Parameter Numerical Valuesa P valueb
TAS (°)
  Preoperative 84.1 ± 4.6 (70.7—91.2)  
  1 year post-op 87.7 ± 3.1 (81.7—92.7) 0.001
  Last F/U 86.2 ± 2.6 (81.2—90.4) 0.045
TT (°)
  Preoperative 15.5 ± 6.4 (4.6—29.3)  
  1 year post-op 5.9 ± 4.3 (0—16.1)  < 0.001
  Last F/U 5.0 ± 2.9 (1.1—9.7)  < 0.001
TMM (°)
  Preoperative 33.8 ± 6.8 (23.1—47.9)  
  1 year post-op 28.9 ± 6.3 (17.0—40.2) 0.015
  Last F/U 28.8 ± 5.8 (19.7—37.9) 0.002
TC (°)
  Preoperative 72.9 ± 4.3 (65.3—81.0)  
  1 year post-op 79.3 ± 5.5 (71.8—90.1)  < 0.001
  Last F/U 78.9 ± 4.5 (71.1—88.7)  < 0.001
TLS (°)
  Preoperative 79.5 ± 7.3 (65.6—94.29)  
  1 year post-op 80.2 ± 5.5 (71.2—90.6) 0.544
  Last F/U 79.8 ± 4.2 (73.3—86.8) 0.839
Opening-wedge angle (°)
  Planned 16.1 ± 5.7 (7.5—29.3)  
  Obtained post-op 15.7 ± 5.3 (7.9—29.1) 0.904c
Wedge height (mm)
  Planned 8.0 ± 3.2 (3.9—17.3)  
  Obtained post-op 8.1 ± 3.3 (4.0—17.6) 0.165c
ROM (°)
  Preoperative 32.9 ± 4.2 (25.0—40.0)  
  Last F/U 34.5 ± 4.4 (30.0—40.0) 0.069c
VAS at gait
  Preoperative 5.3 ± 0.6 (4.0—6.0)  
  Last F/U 2.7 ± 0.7 (2.0—4.0)  < 0.001c
AOFAS scores
  Preoperative 56.2 ± 7.6 (45.0—74.0)  
  Last F/U 80.6 ± 4.6 (73.0—89.0)  < 0.001
  1. aThe values are given as the mean ± SD (range)
  2. bThe P values shown are for the comparisons between the preoperative and follow-up investigations
  3. cWilcoxon signed-rank test