Table 4 Sub-group analysis and comparison of pre-op and post-op radiological ankle parameters

Tibio-talar angle (TTA) [in degrees]

93.30, 3.25, 91.98–94.61

93.11, 3.43, 91.73–94.50

91.92, 2.91, 90.74–93.1

92.68, 4.97, 90.68–94.69

92.27, 4.64, 90.39–94.14

92.58, 3.91, 91.0–94.16

0.611^a

Tibial Anterior Surface angle (TAS) [in degrees]

93.35, 2.45, 92.35–94.34

93.45, 2.37, 92.5–94.41

92.29, 2.58, 92.35–94.34

93.65, 3.43, 92.26–95.04

93.32, 3.49, 91.19–94.73

91.98, 3.21, 90.68–93.28

0.338^a

Lateral distal tibial angle (LDTA) [in degrees]

87.69, 2.27, 86.77–88.61

87.43, 2.68, 86.34–88.52

88.46, 2.25, 87.55–89.38

87.55, 3.27, 86.23–88.88

87.12, 3.2, 85.82–88.43

87.86, 2.86, 86.7–89.02

0.163^a

Talar-Tilt angle (TT) [in degrees]

0.89, 0.77, 0.57–1.2

0.78, 0.622, 0.53–1.03

0.8077, 0.57, 0.577–1.03

0.82, 0.719, 0.53–1.1

1.3, 0.75, 1.00–1.6

1.52, 1.96, 0.73–2.32

0.044^a

Anatomical talo-crural angle (aTC) [in degrees]

84.88, 2.45, 83.89–85.87

84.62, 4.69, 82.72–86.52

84.05, 4.33, 82.3–85.8

83.68, 3.95, 82.03–85.22

84.05, 5.24, 81.94–86.17

84.47, 4.73, 82.56–86.38

0.617^a

Tibial plateau and tibial plafond angle (PP) [in degrees]

4.18, 3.02, 2.9–5.4

3.45, 2.28, 2.5–4.3

6.49, 3.29, 5.1–7.8

3.6, 2.84, 2.4–4.75

3.6, 225, 2.2–4.57

2.83, 2.72, 1.7–3.93

0.806^a

Ground surface and distal tibial plafond angle (GP) [in degrees]

5.83, 4.09, 4.17–7.48

4.2, 2.57, 3.16–5.24

9.15, 3.66, 7.6–10.62

2.78, 2.23, 1.8–3.68

2.86, 1.94, 2.08–3.65

2.71, 1.84, 1.9–3.46

0.828^a

Ground surface and upper surface of talus angle (GT) [in degrees]

5.4, 4.18, 3.7–7.16

3.91, 2.2, 3.017–4.81

9.3, 3.83, 7.7–10.86

2.65, 2.23, 1.7–3.55

2.9, 1.92, 2.12–3.68

2.8, 2.24, 1.9–3.7

0.036^a