Table II.
Association between PD-L1 expression and clinical parameters.
| PD-L1 expression, n | ||||
|---|---|---|---|---|
| Variables | Total cases, n | Negative | Positive | P-value |
| Patients | 104 | 65 | 39 | |
| Age (years) | 0.447 | |||
| ≤65 | 53 | 35 | 18 | |
| >65 | 51 | 30 | 21 | |
| Sex | 0.575 | |||
| Male | 88 | 54 | 34 | |
| Female | 16 | 11 | 5 | |
| Pathological type | 0.064 | |||
| SCC | 99 | 64 | 35 | |
| Others | 5 | 1 | 4 | |
| Location | 0.417 | |||
| Upper | 29 | 21 | 8 | |
| Middle | 52 | 31 | 21 | |
| Lower | 23 | 13 | 10 | |
| Length (cm) | 0.273 | |||
| ≤5 | 46 | 25 | 21 | |
| >5–7 | 26 | 17 | 9 | |
| >7 | 32 | 23 | 9 | |
| T-classification | 0.103 | |||
| T1-2 | 14 | 6 | 8 | |
| T3-4 | 90 | 59 | 31 | |
| N-classification | 0.966 | |||
| N0 | 36 | 22 | 14 | |
| N1 | 63 | 40 | 23 | |
| N2 | 5 | 3 | 2 | |
| Clinical stage | 0.276 | |||
| I | 5 | 2 | 3 | |
| II | 21 | 11 | 10 | |
| III | 78 | 52 | 26 | |
PD-L1, programmed death ligand 1; SCC, squamous cell carcinoma; T-, tumor; N-, node.