Table 3 Distribution of clinicopathological characteristics according to programmed cell death ligand 1 expression
Characteristics | All patients (%) | PD-L1 ≥ 5% (%) | PD-L1 < 5% (%) | p value |
|---|---|---|---|---|
Age (years) | ||||
Median [range] | 70 [44–88] | 72 [44–88] | 70 [49–72] | 0.561 |
Sex | ||||
Male | 20 (69.0) | 16 (80) | 4 (44.4) | 0.088 |
Female | 9 (31.0) | 4 (20) | 5 (55.6) | |
Smoking status | ||||
Never | 7 (24.1) | 2 (10) | 5 (55.6) | 0.016 |
Former/current | 22 (75.9) | 18 (90) | 4 (44.4) | |
Cavity on CT | ||||
Absent | 21 (72.4) | 13 (65) | 8 (89) | 0.371 |
Present | 8 (27.6) | 7 (35) | 1 (11) | |
Ringed FDG uptake on PET/CT | ||||
Absent | 15 (55.6) | 10 (55.6) | 5 (55.6) | 1 |
Present | 12 (44.4) | 8 (44.4) | 4 (44.4) | |
Tumor size (mm) | ||||
Median [range] | 38 [15–92] | 38 [15–92] | 32 [15–85] | 0.561 |
pT classification | ||||
T1 | 6 (20.7) | 3 (15.8) | 3 (30) | 0.072 |
T2 | 12 (41.4) | 6 (31.6) | 6 (60) | |
T3 | 8 (27.6) | 8 (42.1) | 0 (0) | |
T4 | 3 (10.3) | 2 (10.5) | 1 (10) | |
pN classification | ||||
N0 | 22 (75.9) | 15 (75) | 7 (77.8) | 1 |
N1 | 4 (13.8) | 3 (15) | 1 (11.1) | |
N2 | 3 (10.3) | 2 (10) | 1 (11.1) | |
Pathological stage | ||||
I | 8 (27.6) | 5 (25) | 3 (33.3) | 1 |
II | 13 (44.8) | 9 (45) | 4 (44.4) | |
III | 7 (24.1) | 5 (25) | 2 (22.2) | |
IV | 1 (3.5) | 1 (5) | 0 (0) | |
Lymphatic invasion | ||||
Absent | 25 (86.2) | 17 (85) | 8 (89.9) | 1 |
Present | 4 (13.8) | 3 (15) | 1 (11.1) | |
Vascular invasion | ||||
Absent | 14 (49.3) | 9 (45) | 5 (55.6) | 0.7 |
Present | 15 (51.7) | 11 (55) | 4 (44.4) | |
Pleural invasion | ||||
Absent | 13 (44.8) | 8 (40) | 5 (55.6) | 0.688 |
Present | 16 (55.2) | 12 (60) | 4 (44.4) | |