Table 1.
Patient characteristics
| Characteristic | Total (n = 47) No. of patients | % |
|---|---|---|
| Gender | ||
| Male | 26 | 55.3 |
| Female | 21 | 44.7 |
| Stage | ||
| I | 9 | 19.1 |
| II | 18 | 38.3 |
| III | 5 | 10.6 |
| IV | 15 | 31.9 |
| Histology | ||
| adenoid cystic carcinoma | 25 | 40.4 |
| mucoepidermoid carcinoma | 9 | 17.0 |
| adenocarcinoma | 11 | 23.4 |
| mucinous adenocarcinoma | 2 | 6.4 |
| Recurrence or metastasis after surgery | ||
| No | 31 | 66.0 |
| Yes | 16 | 34.0 |
| PD-L1 expression in tumor cells membrane | ||
| < 5% (negative) | 23 | 48.9 |
| ≥ 5% (positive) | 24 | 51.1 |
| PD-L1 expression in tumor-infiltrating mononuclear cells (TIMC) | ||
| Score < 4 (negative) | 27 | 57.4 |
| Score ≥ 4 (positive) | 20 | 42.6 |
| Median | Min-max | |
| Age (years) | 62.0 | 24–80 |