Table 1 Patient characteristics

Age, years

0.035

   ≦55

188 (47.6%)

47

141

   > 55

207 (52.4%)

34

173

Gender

0.176

   Male

380 (96.2%)

80

300

   Female

15 (3.8%)

1

14

Smoking

0.856

   Yes

342 (86.6%)

71

271

   No

53 (13.4%)

10

43

Alcohol drinking

0.869

   Yes

275 (69.6%)

57

218

   No

120 (30.4%)

24

96

Betel nut chewing

   Yes

186 (47.1%)

41

145

0.533

   No

209 (52.9%)

40

169

T stage

0.012

   T1

19 (4.8%)

4

15

   T2

71 (18%)

11

60

   T3

73 (18.5%)

6

63

   T4

232 (58.7%)

60

172

N stage

0.300

   N0

113 (28.6%)

20

93

   N1

73 (18.5%)

12

61

   N2

154 (39%)

39

115

   N3

55 (13.9%)

10

45

Overall Stage

0.013

   I

2 (0.5%)

0

2

   II

22 (5.6%)

2

20

   III

57 (14.4%)

4

53

   IV

314(79.5%)

75

239