Table 1 Baseline of extremity liposarcoma patients
| Â | Training cohort | Validation cohort |
|---|---|---|
Age, year | 55.53 ± 16.47 | 55.21 ± 16.53 |
Tumor size, cm | 13.75 ± 8.48 | 13.53 ± 8.19 |
Race | ||
 Black | 165 | 76 |
 Other | 131 | 51 |
 White | 1226 | 521 |
Sex | ||
 Female | 646 | 284 |
 Male | 876 | 364 |
Histological type | ||
 Liposarcoma, NOS | 181 | 73 |
 Liposarcoma, well differentiated | 538 | 230 |
 Myxoid liposarcoma | 443 | 198 |
 Round cell liposarcoma | 46 | 24 |
 Pleomorphic liposarcoma | 131 | 60 |
 Mixed liposarcoma | 62 | 27 |
 Fibroblastic liposarcoma | 2 | 2 |
 Dedifferentiated liposarcoma | 119 | 34 |
AJCC | ||
 I/II | 1229 | 541 |
 III/IV | 293 | 107 |
T | ||
 T1 | 213 | 101 |
 T2 | 1309 | 547 |
N | ||
 N0 | 1516 | 645 |
 N1 | 6 | 3 |
M | ||
 M0 | 1498 | 628 |
 M1 | 24 | 20 |
 Surgery performed | 1494 | 635 |
 Radiotherapy performed | 714 | 294 |
 Chemotherapy performed | 165 | 65 |
Primary site | ||
 Lower extremity | 1333 | 557 |
 Upper extremity | 189 | 91 |
Grade | ||
 I | 829 | 358 |
 II | 286 | 135 |
 III | 196 | 75 |
 IV | 211 | 80 |