Table 1 Baseline data of Ewing's sarcoma patients
Variable | level | SEER data(Training group, N=767) | Multicenter data(validation group, N=51) | p |
|---|---|---|---|---|
Survival time (mean (SD)) | NA | 30.98 (22.73) | 29.71 (22.40) | 0.698 |
Age (%) | <17 | 354 (46.2) | 25 (49.0) | 0.41 |
17-27 | 229 (29.9) | 11 (21.6) | Â | |
>27 | 184 (24.0) | 15 (29.4) | Â | |
sex (%) | Male | 439 (57.2) | 28 (54.9) | 0.857 |
Female | 328 (42.8) | 23 (45.1) | Â | |
Primary.Site (%) | Axis bone | 256 (33.4) | 13 (25.5) | 0.281 |
Limb bone | 320 (41.7) | 27 (52.9) | Â | |
Other | 191 (24.9) | 11 (21.6) | Â | |
Laterality (%) | Left | 301 (39.2) | 21 (41.2) | 0.832 |
Right | 257 (33.5) | 15 (29.4) | Â | |
Not a paired site | 209 (27.2) | 15 (29.4) | Â | |
T (%) | T1 | 328 (42.8) | 20 (39.2) | 0.081 |
T2 | 398 (51.9) | 25 (49.0) | Â | |
T3 | 23 (3.0) | 5 (9.8) | Â | |
TX | 18 (2.3) | 1 (2.0) | Â | |
M (%) | M0 | 536 (69.9) | 30 (58.8) | 0.134 |
M1 | 231 (30.1) | 21 (41.2) | Â | |
Radiation (%) | No | 382 (49.8) | 29 (56.9) | 0.406 |
Yes | 385 (50.2) | 22 (43.1) | Â | |
Chemotherapy (%) | No | 42 (5.5) | 0 (0.0) | 0.165 |
Yes | 725 (94.5) | 51 (100.0) | Â | |
Tumor size (%) | ≤58 | 242 (31.6) | 15 (29.4) | 0.503 |
59-128 | 378 (49.3) | 29 (56.9) | Â | |
>127 | 147 (19.2) | 7 (13.7) | Â | |
Bone metastases (%) | No | 667 (87.0) | 40 (78.4) | 0.131 |
Yes | 100 (13.0) | 11 (21.6) | Â | |
Lung metastases (%) | No | 628 (81.9) | 41 (80.4) | 0.937 |
Yes | 139 (18.1) | 10 (19.6) | Â | |
surgery (%) | No | 305 (39.8) | 25 (49.0) | 0.247 |
Yes | 462 (60.2) | 26 (51.0) | Â |