Table 2 Postoperative functional outcome and radiographic outcome at 2-year follow-up

 Flexion

97.3 ± 8.62

75.2 ± 9.27

75.3 ± 8.1

0.92

 Extension

68.4 ± 9.02

68.0 ± 8.61

68.7 ± 9.34

0.66

 Supination

73.9 ± 6.62

73.9 ± 6.27

72.9 ± 6.88

0.369

 Pronation

61.2 ± 4.90

62.7 ± 5.06

61.3 ± 4.73

0.103

 Radial deviation

29.0 ± 6.82

29.4 ± 5.84

28.7 ± 7.47

0.560

 Ulnar deviation

26.4 ± 6.26

30.5 ± 5.50

23.4 ± 5.00

< 0.001

Grip Strength (%)

64.9 ± 8.12

72.5 ± 5.07

59.4 ± 4.72

0.001

Pinch (%)

60.0 ± 5.35

61.8 ± 5.13

58.7 ± 5.18

0.001

DASH score

19.1 ± 9.85

13.1 ± 3.26

23.4 ± 10.30

< 0.001

VAS for pain

0.58 ± 1.31

0.1 ± 0.40

0.9 ± 1.60

< 0.001

 Radial inclination (Degrees)

19.5 ± 5.08

21.7 ± 4.26

18.0 ± 5.09

< 0.001

 Contralateral radial inclination (Degrees)

20.5 ± 3.08

20.3 ± 4.15

20.6 ± 4.28

0.683

 Volar tilt (Degrees)

13.1 ± 3.21

13.4 ± 3.26

12.8 ± 3.18

0.320

 Contralateral Volar tilt (Degrees)

13.2 ± 2.11

12.9 ± 3.14

12.8 ± 3.15

0.816

 Ulnar variance (mm)

1.7 ± 1.41

1.3 ± 0.77

3.5 ± 1.19

< 0.001

 Contralateral Ulnar variance (mm)

0.20 ± 1.21

0.12 ± 0.92

0.18 ± 1.20

0.716

 Distraction length (mm)

–

2.3 ± 1.18

–

–

 Subsequent USO

12 (9.0%)

0(0%)

12 (15.1%)

0.001