Table 1.

Patient characteristics

Characteristic	Experimental group (N=113)	Control group (N=110)	P
Age (Years)			0.792
Median	45.05	45.32
Range	28~65	23~65
Gender			0.788
Male	89	85
Female	24	25
Histology			0.625
WHO I	2	2
WHO II	6	4
WHO III	105	104
T stage			0.679
T1	1	1
T2	12	10
T3	46	51
T4	54	48
N stage			0.74
N0	5	7
N1	29	32
N2	66	54
N3	13	17
AJCC stage grouping			0.721
III	52	50
IV	61	60