| Overall | AYA | Child | Adult | Elderly | P value | |||||
---|---|---|---|---|---|---|---|---|---|---|---|
(15-39 years) | (−14 years) | (40-64 years) | (65- years) | ||||||||
N | % | N | % | N | % | N | % | N | % | Â | |
Total | 3457 | Â | 1123 | 32.5% | 521 | 15.1% | 982 | 28.4% | 831 | 24.0% | Â |
Histologic subtype |  |  |  |  |  |  |  |  |  |  | < 0.001 |
 Osteosarcoma | 1497 | 43.3% | 631 | 56.2% | 405 | 77.7% | 278 | 28.3% | 183 | 22.0% |  |
 Chondrosarcoma | 885 | 25.6% | 198 | 17.6% | 8 | 1.5% | 376 | 38.3% | 303 | 36.5% |  |
 Ewing’s sarcoma | 260 | 7.5% | 139 | 12.4% | 92 | 17.7% | 28 | 2.9% | 1 | 0.1% |  |
 Bone MFH | 205 | 5.9% | 22 | 2.0% | 2 | 0.4% | 82 | 8.4% | 99 | 11.9% |  |
 Chordoma | 253 | 7.3% | 16 | 1.4% | 2 | 0.4% | 88 | 9.0% | 147 | 17.7% |  |
 HG sarcoma(others) | 214 | 6.2% | 52 | 4.6% | 4 | 0.8% | 85 | 8.7% | 73 | 8.8% |  |
 LG sarcoma(others) | 143 | 4.1% | 65 | 5.8% | 8 | 1.5% | 45 | 4.6% | 25 | 3.0% |  |
Sex | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | 0.028 |
 Male | 1930 | 55.8% | 656 | 58.4% | 278 | 53.4% | 561 | 57.1% | 435 | 52.3% |  |
 Female | 1527 | 44.2% | 467 | 41.6% | 243 | 46.6% | 421 | 42.9% | 396 | 47.7% |  |
Tumor size (cm), mean [SD] | 9.1 [4.9] | 8.8 [4.5] | 10.3 [4.8] | 8.9 [5.1] | 9.0 [5.1] | < 0.001 | |||||
 ≤8 cm | 1655 | 47.9% | 538 | 47.9% | 193 | 37.0% | 510 | 51.9% | 414 | 49.8% |  |
 > 8 cm and ≤ 16 cm | 1299 | 37.6% | 432 | 38.5% | 246 | 47.2% | 322 | 32.8% | 299 | 36.0% |  |
 > 16 cm | 243 | 7.0% | 61 | 5.4% | 50 | 9.6% | 67 | 6.8% | 65 | 7.8% |  |
 Unknown | 260 | 7.5% | 92 | 8.2% | 32 | 6.1% | 83 | 8.5% | 53 | 6.4% |  |
Tumor location |  |  |  |  |  |  |  |  |  |  | < 0.001 |
 Upper extremity | 349 | 10.1% | 134 | 11.9% | 40 | 7.7% | 105 | 10.7% | 70 | 8.4% |  |
 Lower extremity | 1689 | 48.9% | 629 | 56.0% | 395 | 75.8% | 399 | 40.6% | 266 | 32.0% |  |
 Trunk | 1276 | 36.9% | 303 | 27.0% | 72 | 13.8% | 437 | 44.5% | 464 | 55.8% |  |
 Head and neck | 35 | 1.0% | 18 | 1.6% | 2 | 0.4% | 10 | 1.0% | 5 | 0.6% |  |
 Multiple disease | 108 | 3.1% | 39 | 3.5% | 12 | 2.3% | 31 | 3.2% | 26 | 3.1% |  |
Surgery | 2473 | 71.5% | 868 | 77.3% | 430 | 82.5% | 713 | 72.6% | 462 | 55.6% | < 0.001 |
Chemotherapy | 1765 | 51.1% | 769 | 68.5% | 474 | 91.0% | 374 | 38.1% | 148 | 17.8% | < 0.001 |
Radiotherapy | 724 | 20.9% | 188 | 16.7% | 81 | 15.5% | 206 | 21.0% | 249 | 30.0% | < 0.001 |