Table 1. Clinical characteristics of patients.

No.	Gender	Age	Tumor location	Smoking	Drinking	TNM	G stage (histologic grade)
1	Female	78	Lower	No	No	T2N0M0	G3
2	Female	68	Lower	No	No	T1N0M0	G2
3	Male	72	Middle	Yes	No	T1N0M0	G2
4	Male	64	Middle	Yes	Yes	T3N1M0	G2
5	Male	69	Middle	No	No	T2N0M0	G2
6	Male	62	Middle	No	No	T3N0M0	G2
7	Male	57	Middle	Yes	Yes	T4N0M0	G2
8	Female	58	Upper	No	No	T2N1M0	G2
9	Female	73	Upper	No	No	T3N0M0	G2
10	Female	68	Middle	No	No	T3N1M0	G2
11	Female	68	Upper	No	No	T3N1M0	G2
12	Female	69	Middle	No	No	T2N1M0	G2
13	Female	64	Middle	No	No	T1N0M0	G2
14	Male	64	Lower	Yes	Yes	T2N2M0	G2
15	Female	61	Lower	No	No	T3N1M0	G3
16	Male	75	Middle	Yes	No	T3N1M0	G3
17	Male	54	Middle	Yes	No	T3N0M0	G1
18	Female	65	Middle	No	No	T2N0M0	G2
19	Male	54	Lower	Yes	Yes	T3N1M0	G2
20	Male	62	Middle	No	No	T3N1M0	G3
21	Male	78	Middle	Yes	No	T3N1M0	G2
22	Male	63	Middle	Yes	No	T2N0M0	G3
23	Female	76	Upper	Yes	Yes	T1N0M0	G2
24	Male	59	Middle	Yes	Yes	T2N1M0	G3
25	Female	60	Middle	No	No	T2N1M0	G2
26	Male	67	Middle	No	No	T2N0M0	G3
27	Male	60	Middle	No	No	T2N1M0	G3
28	Male	60	Middle	No	No	T3N1M0	G3
29	Male	67	Middle	Yes	Yes	T3N0M0	G2
30	Male	46	Middle	Yes	Yes	T3N1M0	G2
31	Male	81	Middle	No	Yes	T2N0M0	G2
32	Male	61	Middle	No	Yes	T1N1M0	G3
33	Male	46	Middle	No	No	T3N1M0	G3
34	Male	65	Middle	Yes	Yes	T3N1M0	G2
35	Female	70	Middle	No	No	T3N1M0	G3
36	Male	67	Lower	No	No	T1N0M0	G3
37	Female	60	Upper	No	No	T1N0M0	G2
38	Male	64	Lower	No	Yes	T3N0M0	G2
39	Male	77	Lower	Yes	No	T3N1M0	G2
40	Male	74	Middle	Yes	Yes	T3N2M0	G3
41	Male	71	Lower	Yes	Yes	T3N3M0	G3
42	Female	71	Middle	No	No	T1N0M0	G2
43	Male	60	Middle	Yes	Yes	T2N1M1	G2