Table 2 Description of the population based on the postoperative follow-up data and comparison of the qualitative data between the VFG+ and VFG− subgroups using the chi² or Fisher’s exact test and the quantitative data using the t-test

0.116

 n = 0

19 (41.3%)

10 (55.6%)

9 (32.1%)

 n = 1; 2

15 (32.6%)

5 (27.8%)

10 (35.8%)

 n ≥ 3

12 (26.1%)

3 (16.6%)

9 (32.1%)

0.032

 1, excellent; 2, good

39 (84.8%)

18 (100%)

21 (75.0%)

 3, fair; 4, poor

7 (15.2%)

0 (0.0%)

7 (25.0%)

 Henderson 1

1 (2.2%)

1 (5.6%)

0 (0.0%)

0.391

 Henderson 2

17 (37.0%)

6 (33.3%)

11 (39.3%)

0.683

 Henderson 3

9 (19.6%)

2 (11.1%)

7 (25%)

0.448

 Henderson 4

3 (6.5%)

1 (5.6%)

2 (7.1%)

1

 Allograft removal^a

2 (4.3%)

1 (5.6%)

1 (3.6%)

1

Bone union

 Healed at last follow-up

43 (93.5%)

17 (94.4%)

26 (92.9%)

1

 Healed with no revision

28 (60.9%)

12 (66.7%)

16 (57.1%)

0.578

 Mean bone union delay (months)

21.8 (4–120)

12.6 (5–34)

27.9 (5–120)

0.012

 MSTS (/30) (n = 44)

27.3 (18–30)

26.3 (21–30)

28 (18–30)

0.060