Table 1 Patient characteristics

Age (years)

22 (18–27)

24 (20–28)

<0.001

  [15–18]

338 (26%)

181 (19%)

<0.001

  [18–25]

539 (42%)

390 (42%)

  [25–30]

413 (32%)

366 (39%)

Gender, Male

721 (56%)

460 (49%)

0.002

De novo metastatic disease

149 (12%)

89 (10%)

0.172

Site of tumor ^a

<0.001

  Bone sarcoma

761 (59%)

213 (23%)

  Soft tissue sarcoma

528 (41%)

724 (77%)

Localisation

  Lower limbs tumors ^a

633 (49%)

244 (26%)

< 0.001

Tumor size (mm) ^b

72 (47–110)

50 (26–80)

< 0.001

Grade of tumor

< 0.001

  Grade 1

79 (6%)

50 (6%)

  Grade 2

92 (7%)

84 (10%)

  Grade 3 ^c

681 (54%)

371 (42%)

  Non gradable tumor

401 (32%)

368 (42%)