Table 3 Radiological and functional outcomes of different varus/valgus deformity subgroup at sixth month follow-up.(mean ± SD, range)

HKAA(°)

 Preoperative

175.85 ± 4.44

177.01 ± 5.38

0.405

172.66 ± 13.55

168.72 ± 11.20

0.357

 Postoperative

179.95 ± 3.43

(174.80-188.90)

180.87 ± 2.51

(176.12-186.88)

0.287

179.38 ± 4.32

(172.10-187.66)

180.06 ± 3.41

(173.30-188.32)

0.607

 δ-HKAA

4.86 ± 2.83

(0.12–11.27)

5.90 ± 3.31

(1.34–11.26)

0.230

13.90 ± 5.77

(5.84–32.46)

13.24 ± 7.07

(2.55–35.22)

0.764

HKAA-outlier(± 3°, n)

8/20

3/20

0.305

11/7

4/13

0.025

FVVA (°)

96.30 ± 2.72

(91.73-101.52)

96.40 ± 2.17

(93.23-100.95)

0.883

95.88 ± 2.59

(90.27–99.36)

96.37 ± 2.37

(90.98-100.85)

0.566

TVVA (°)

88.86 ± 1.75

(83.79–92.03)

89.53 ± 1.85

(85.58–93.18)

0.199

88.54 ± 2.44

(83.75–92.74)

89.31 ± 1.84

(85.32–94.15)

0.266

TVVA-outlier(± 3°, n)

4/24

3/20

1.000

4/14

2/15

0.685

PTSA(°)

4.28 ± 2.37

(0.11–8.86)

2.05 ± 3.45

(-6.78-9.47)

0.009

7.13 ± 3.29

(-0.59-12.58)

2.24 ± 3.40

(-4.55-8.72)

< 0.001

PTSA-outlier(± 3°, n)

19/9

11/12

0.148

18/0

12/5

0.019

FSA(°)

2.30 ± 2.49

(-1.76-8.61)

4.19 ± 4.23

(-2.49-11.16)

0.067

3.47 ± 4.05

(-3.36-11.08)

6.60 ± 5.09

(-0.74-16.54)

0.052

PCOR

0.50 ± 0.05

(0.38–0.60)

0.49 ± 0.04

(0.41–0.56)

0.407

0.49 ± 0.04

(0.44–0.57)

0.51 ± 0.04

(0.45–0.61)

0.259

ISI

1.22 ± 0.22

(0.70–1.55)

1.26 ± 0.17

(0.97–1.61)

0.430

1.26 ± 0.17

(0.97–1.65)

1.27 ± 0.24

(0.86–1.77)

0.915

HSS

93.18 ± 2.07

(88–96)

93.35 ± 2.27

(89–97)

0.782

91.33 ± 2.50

(85–95)

93.12 ± 1.97

(90–95)

0.036

VAS

0.43 ± 0.69

(0–2)

0.26 ± 0.45

(0–1)

0.321

0.72 ± 0.75

(0–2)

0.24 ± 0.44

(0–1)

0.026

Range of motion(°)

 Flexion

115.00 ± 10.63

(100–135)

118.70 ± 10.17

(105–140)

0.213

112.22 ± 8.09

(100–130)

118.53 ± 8.06

(105–130)

0.027

 Extension

1.61 ± 2.38(0–5)

2.17 ± 2.53(0–5)

0.415

1.39 ± 2.30(0–5)

1.76 ± 2.46(0–5)

0.644