Table IV.
Association between PD-L1 expression and clincopathological characteristics of patients.
| PD-L1 expression | |||
|---|---|---|---|
| Characteristic | + | − | P-value |
| No. of patients | 31 | 17 | |
| Age, yearsa | 60.5±6.7 | 57.2±8.8 | 0.164 |
| Gender | |||
| Male | 23 | 10 | 0.272 |
| Female | 8 | 7 | |
| Histology | |||
| SCC | 14 | 9 | 0.606 |
| ADC | 17 | 8 | |
| Differentiation | |||
| Well | 24 | 16 | 0.138 |
| Poor | 7 | 1 | |
| Tumor stage | |||
| I/II | 19 | 15 | 0.049 |
| III | 12 | 2 | |
| Lymph node metastasis | |||
| No | 18 | 12 | 0.107 |
| Yes | 13 | 5 | |
a
Data presented as mean ± standard deviation. PD-L1, programmed cell death protein 1 ligand 1; SCC, squamous cell carcinoma; ADC, adenocarcinoma.