Table 6.
Comparison between immunostaining for PD-L1 and sPD-L1 levels in high-grade STSs.
| High-grade STS | n (53) | sPD-L1 group | PD-L1 immunostaining | Kappa coefficient | |
|---|---|---|---|---|---|
| High or low | + | − | |||
| Total | 53 | High | 9 | 22 | −0.025 |
| Low | 7 | 15 | |||
| UPS | 12 | High | 4 | 3 | 0.351 |
| Low | 1 | 4 | |||
| Myxofibrosarcoma | 11 | High | 1 | 6 | −0.294 |
| Low | 2 | 2 | |||
| Liposarcoma (dedifferentiated) | 10 | High | 0 | 5 | −0.400 |
| Low | 2 | 3 | |||
| Liposarcoma (myxoid) | 3 | High | 1 | 0 | 0.400 |
| Low | 1 | 1 | |||
| Leiomyosarcoma | 8 | High | 1 | 4 | 0.157 |
| Low | 0 | 3 | |||
| Synovial sarcoma | 4 | High | 1 | 2 | 0.200 |
| Low | 0 | 1 | |||
| MPNST | 3 | High | 0 | 1 | −0.500 |
| Low | 1 | 1 | |||
| Others | 2 | High | 1 | 1 | 0 |
| Low | 0 | 0 | |||
This table shows the comparison between positiv ity of immunostaining for PD-L1 and the level of high-sPD-L1 in high-grade STSs. Positivity of immunostaining for PD-L1 was defined as a positive stain rate of more than 1% of tumor cells. A high sPD-L1 was defined as a concentration greater than 44.26 pg/mL.