Table 1. Clinicopathologic features among 15 patients.

Characteristics	Values
Gender, n (%)
Female	1 (6.7)
Male	14 (93.3)
Age (years)
Mean	61
<65, n (%)	3 (20.0)
≥65, n (%)	12 (80.0)
Smoking status, n (%)
No	5 (33.3)
Yes	10 (66.7)
ECOG PS, n (%)
0–1	13 (86.7)
2	2 (13.3)
Pathology, n (%)
Adenocarcinoma	12 (80.0)
Squamous cell carcinoma	3 (20.0)
LIPI, n (%)
0	2 (13.3)
1	8 (53.3)
2	5 (33.3)
PD-L1, n (%)
Positive (≥1%)	4 (26.7)
Negative (<1%)	1 (6.7)
Unknown	10 (66.7)
Lung metastasis, n (%)
No	3 (20.0)
Yes	12 (80.0)
Bone metastasis, n (%)
No	9 (60.0)
Yes	6 (40.0)
Brain metastasis, n (%)
No	9 (60.0)
Yes	6 (40.0)

LIPI, lung immune prognostic index; ECOG PS, Eastern Cooperative Oncology Group Performance Status; PD-L1, programmed cell death ligand 1.