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Table 2 Comparison of navigation and radiographic measurements between early and late cohorts of computer-assisted, lateral closing-wedge high tibial osteotomy

From: The influence of computer-assisted surgery experience on the accuracy and precision of the postoperative mechanical axis during computer-assisted lateral closing-wedge high tibial osteotomy

  Early cohortLate cohortP value
Navigation
 Mechanical axis (°)aPreoperativeVarus 8.4 ± 2.7Varus 9.0 ± 3.20.204
PostoperativeValgus 3.4 ± 1.4Valgus 3.4 ± 1.40.894
 Mechanical axis % (%)bPostoperative62.1 ± 5.861.0 ± 6.50.140
Radiograph
 Mechanical axis (°)aPreoperativeVarus 7.3 ± 3.1Varus 8.3 ± 3.00.078
PostoperativeValgus 1.0 ± 2.9Valgus 2.2 ± 1.70.003
 Mechanical axis % (%)bPreoperative14.8 ± 11.910.8 ± 14.30.079
Postoperative55.5 ± 11.560.8 ± 8.30.138
 Tibial posterior slope anglePreoperative10.2 ± 2.110.1 ± 2.30.764
Postoperative8.3 ± 2.28.4 ± 2.30.694
Change in tibial posterior slope angle−1.9 ± 0.7−1.7 ± 1.00.084
  1. aMechanical axis, angle between the femoral and tibial mechanical axis; negative values indicate varus angles; bmechanical axis %, percentile denotation ([b/a] × 100) of the point at which the mechanical axis of the lower extremity intersected the line extending from the medial border to the lateral border of the tibial plateau on orthoroentgenogram
  2. Significant values are shown in bold typeface; P <  0.05