Table 1. The relationship between PD-L1 expression and clinicopathological features of osteosarcoma.
| Clinic pathological features | No. of cases (%) | PD-L1 expression High (%) | PD-L1 expression Low (%) | P value | |
|---|---|---|---|---|---|
| All patients | 72 (100) | ||||
| Age, y | ≤ 18 | 32 (52.2) | 15 (51.4) | 17 (48.6) | 0.4763 |
| > 18 | 40 (47.8) | 15 (31.3) | 25(68.7) | ||
| Gender | Male | 43 (62.1) | 17 (40.0) | 26 (60.0) | 0.8079 |
| Female | 29 (37.9) | 13 (44.4) | 16 (55.6) | ||
| Metastasis | Absent | 24 (32.8) | 2 (40.9) | 22 (59.1) | < 0.0001 |
| Present | 48 (67.2) | 28 (42.2) | 20 (57.8) | ||
| Recurrence | Absent | 49 (70.1) | 19 (42.6) | 30 (57.4) | 0.6089 |
| Present | 23 (29.9) | 11 (40.0) | 12 (60.0) | ||
| Response to preoperative chemotherapy | Good* | 10 (12.1) | 3 (62.5) | 7 (37.5) | 0.1642 |
| Poor | 40 (54.6) | 23 (41.7) | 17 (58.3) | ||
| N/A | 22 (33.3) | 4 (59.1) | 18 (40.9) | ||
| PD-L1 expression | High | 30 (41.8) | |||
| Low | 42 (58.2) |
* Necrosis over 90%.