Table 1. Patient’s characteristics at diagnosis according to risk group.
| All patients (N=43) | SR patients (N=22) | HR patients (N=21) | |
|---|---|---|---|
|
Gender,
N
(%) | |||
| Male | 32 (74.4) | 18 (81.8) | 14 (66.7) |
| Female | 11 (25.6) | 4 (18.2) | 7 (33.3) |
|
Primary tumour location,
N
(%) | |||
| Pelvis | 9 (20.9) | 0 (0.0) | 9 (42.9) |
| Axial skeleton | 6 (14.0) | 0 (0.0) | 6 (28.6) |
| Appendicular skeleton | 20 (46.5) | 18 (81.8) | 2 (9.5) |
| Soft tissue | 8 (18.6) | 4 (18.2) | 4 (19.0) |
|
Metastases,
N
(%) | |||
| Y | 10 (23.3) | 0 (0.0) | 10 (47.6) |
| N | 33 (76.7) | 22 (100.0) | 11 (52.4) |
|
Metastases location, N (%) | |||
| Lung | 6 (60.0) | — | 6 (60.0) |
| BM/bone | 3 (30.0) | — | 3 (30.0) |
| Mixed | 1 (10.0) | — | 1 (10.0) |
|
BM micrometastasis,
N
(%) | |||
| Negative | 37 (90.2) | 22 (100.0) | 15 (78.9) |
| Positive | 4 (9.8) | 0 (0.0) | 4 (21.1) |
| ND/NA | 2 | — | — |
|
Age (years) | |||
| Median | 17 | 12.5 | 18 |
| Range | 3–40 | 3–37 | 3–40 |
|
Discrete age,
N
(%) | |||
| <18 years | 24 (55.8) | 14 (63.6) | 10 (47.6) |
| ⩾18 years | 19 (44.2) | 8 (36.4) | 11 (52.4) |
Abbreviations: HR=high risk; ND/NA=not done/not available; SR=standard risk.