1.

本研究纳入患者的临床资料（n=66）

Clinical characteristics of patients included in this study (n=66)

Characteristic	GO group (n =33)	GP group (n =33)	n	P
GO group: The patients received gemcitabine 1, 000 mg/m2 on day 1 and day 8 and oxaliplatin 130 mg/m2 on day 1 by intravenous infusion, with 21 days as one cycle; GP group: The patients received gemcitabine 1, 000 mg/m2 on day 1 and day 8 and cisplatin 25 mg/m2 on day 1, day 2 and day 3 by intravenous infusion, with 21 days as one cycle.
Gender				0.415
Male	22	25	47
Female	11	8	19
Age (year)				0.806
Median	73	74
Range	70-82	70-79
Performance score				0.547
0-1	25	27	52
2	8	6	14
Histology				0.899
Adenocarcinoma	15	13	28
Squamous cell carcinoma	17	19	36
Others	1	1	2
TNM stage				0.314
Ⅲb	15	11	26
Ⅳ	18	22	40
Cigarette smoking				> 0.999
Smoker	18	17	35
Non-smoker	15	16	31