Table 5 Postoperative outcomes measured at the last follow-up

Clinical outcomes

 LLD (mm)^a

1.17 ± 0.26 (0–5)

4.52 ± 3.05 (0–15)

< 0.001

 Modified Severin grade^b

0.35

  Grade I

23 (65.7%)

20 (55.6%)

  Grade II

10 (28.6%)

9 (25%)

  Grade III

2 (5.7%)

6 (16.7%)

  Grade IV

0

1 (2.8%)

Radiological outcomes

 AI^a

26.68 ± 3.65 (19.30–34.10)

27.62 ± 4.59 (19.70–36.50)

0.34

 Severin radiological grade^b

0.26

  Grade I

24 (68.6%)

18 (50%)

  Grade II

9 (25.7%)

12 (33.3%)

  Grade III

0

0

  Grade IV

2 (5.7%)

2 (5.6%)

  Grade V

0

1 (2.8%)

  Grade VI

0

3 (8.3%)

Complications^b

Avascular necrosis

0

4 (11.1%)

0.06

Infection

0

1 (2.8%)

0.50

Shenton line disruption

2 (5.7%)

6 (16.7%)

0.13