Table 1.

Baseline clinical characteristics (n=21)

Characteristics	No (%)
Age, year (median (range))	62 (31–74)
Gender
Male	20 (95.2%)
Female	1 (4.8%)
ECOG performance status
0	1 (4.8%)
1	20 (95.2%)
Tumor length, cm (median (range))	5 (2-8)
Tumor location
Upper	4 (19.0%)
Middle	6 (28.6%)
Lower	11 (52.4%)
Clinical tumor stage
T2	1 (4.8%)
T3	19 (90.5%)
T4a	1 (4.8%)
Clinical nodal stage
N1	9 (42.9%)
N2	12 (57.1%)
Clinical stage
III	20 (95.2%)
IVa	1 (4.8%)
PD-L1 expression (n=19)
TPS<1%	9 (47.4%)
TPS 1%–49%	8 (42.1%)
TPS≥50%	2 (10.5%)

ECOG, Eastern Cooperative Oncology Group; PD-L1, programmed death ligand 1; TPS, tumor proportion score.