Table 1.
Baseline characteristics
| Variables | All PRC2 expression | P value | |||
|---|---|---|---|---|---|
| N (%) | Low or Intermediate | High | |||
| Sex | Male | 62 (59%) | 59 (56%) | 3 (3%) | 0.965 |
| Female | 43 (41%) | 41 (39%) | 2 (2%) | ||
| Age at diagnosis (year, median, range) | 26.8 (1–78) | 26.3 ± 18.7 | 35.6 ± 19.7 | 0.280 | |
| Diagnosis | Synovial sarcoma | 18 (17%) | 18 (17%) | 0 (0%) | 0.400 |
| Rhabdomyosarcoma | 28 (27%) | 25 (24%) | 3 (3%) | ||
| Ewing sarcoma | 15 (14%) | 14 (13%) | 1 (1%) | ||
| Osteosarcoma | 30 (29%) | 29 (28%) | 1 (1%) | ||
| Others | 14 (13%) | 14 (13%) | 0 (0%) | ||
| Primary Site | Head/Neck | 20 (19%) | 20 (19%) | 0 (0%) | 0.512 |
| Trunk | 29 (28%) | 27 (26%) | 2 (2%) | ||
| Upper Extremity | 12 (11%) | 12 (11%) | 0 (0%) | ||
| Lower Extremity | 44 (42%) | 41 (39%) | 3 (3%) | ||
| Histologic Grade | Grade 1 | 4 (4%) | 4 (4%) | 0 (0%) | 0.853 |
| Grade 2 | 2 (2%) | 2 (2%) | 0 (0%) | ||
| Grade 3 | 99 (95%) | 94 (90%) | 5 (5%) | ||
| Initial distant metastasis | No | 83 (83%) | 80 (80%) | 3 (3%) | 0.531 |
| Yes | 17 (17%) | 16 (16%) | 1 (1%) | ||
| Surgery | No | 6 (6%) | 5 (5%) | 1 (1%) | 0.259 |
| Yes | 99 (95%) | 95 (91%) | 4 (4%) | ||
| Resection margin | R0 | 68 (69%) | 66 (67%) | 2 (2%) | 0.636 |
| R1 | 29 (29%) | 27 (27%) | 2 (2%) | ||
| R2 | 2 (2%) | 2 (2%) | 0 (0%) | ||
| Stage | I or II | 53 (50%) | 52 (49%) | 1 (1%) | 0.205 |
| III or IV | 52 (50%) | 48 (46%) | 4 (4%) | ||
| Chemotherapy | No | 33 (35%) | 30 (31%) | 3 (4%) | 0.081 |
| Yes | 63 (65%) | 62 (64%) | 1 (1%) | ||
| Radiotherapy | No | 57 (60%) | 56 (59%) | 1 (1%) | 0.144 |
| Yes | 38 (40%) | 35 (37%) | 3 (3%) | ||