Table 1 Description of the population of the entire cohort and comparison of the qualitative data between the VFG+ and VFG− subgroups using the chi² or Fisher’s exact test and for the quantitative data the t-test

 Age (years)

20.9 (7–62)

19.6 (7–48)

21.7 (9–62)

0.553

 Male

16 (34.8%)

8 (44.4%)

8 (28.6%)

0.270

 Female

30 (65.2%)

10 (55.6%)

20 (71.4%)

 Follow-up (months)

132.7 (24–402)

114.9 (37–233)

145.8 (24–402)

0.250

 Resection length (mm)

198 (100–340)

190 (140–260)

203 (100–300)

0.395

Diagnosis

0.088

 Osteosarcoma

26 (56.5%)

9 (50.0%)

17 (60.7%)

 Ewing’s sarcoma

11 (23.9%)

7 (38.9%)

4 (14.3%)

 Chondrosarcoma

5 (10.9%)

0 (0.0%)

5 (17.9%)

 Others^a

4 (8.7%)

2 (11.1%)

2 (7.1%)

 Adjuvant chemotherapy

35 (76.1%)

16 (88.9%)

19 (67.9%)

0.160

 Adjuvant radiotherapy

4 (8.7%)

2 (11.1%)

2 (7.1%)

0.639

0.022

 Irradiated

14 (30.4%)

2 (11.1%)

12 (42.9%)

 Fresh-frozen

32 (69.6%)

16 (88.9%)

16 (57.1%)

< 0.001

 Nail

12 (26.1%)

9 (50.0%)

3 (10.7%)

 Bridging plate

17 (37.0%)

9 (50.0%)

8 (28.6%)

 Nail + plate

17 (37.0%)

0 (0.0%)

17 (60.7%)