Table 2.

Characteristics of patients

Variables	Recurrence		P value
	No	Yes
Age (yr)			0.804
< 63	31	10
≥ 63	29	11
Gender			0.569
Female	16	4
Male	44	17
Smoking			0.614
No	31	9
Yes	29	12
Drinking			0.799
No	26	8
Yes	34	13
Operation			0.614
No	38	12
Yes	22	9
Chemo-/radio-therapy			0.751
No	11	5
Yes	49	16
Stage			< 0.001
I	25	3
II	22	3
III	13	15