Table 2.

Baseline clinical characteristics comparison of patients between immunotherapy training set and chemotherapy cohorts.

Variables	Sample	Immunotherapy	Chemotherapy	P Value
Age, median		62 (56, 68)	60 (55, 65)	0.165
Sex, No. (%)				0.769
Male	102	76 (83.52%)	26 (81.25%)
Female	21	15 (16.48%)	6 (18.75%)
Smoking history, No. (%)				0.157
Non-smokers	35	29 (31.87%)	6 (18.75%)
Smokers	88	62 (68.13%)	26 (81.25%)
Pathological type, No. (%)				0.016
Adenocarcinoma	70	46 (50.55%)	24 (75.00%)
Others	53	45 (49.45%)	8 (25.00%)
Distant metastasis, No. (%)				0.8
Absence	25	18 (19.78%)	7 (21.88%)
Presence	98	73 (80.22%)	25 (78.12%)