Table 1.

Patient's characteristics (n = 86)

Characteristics		No. of cases	%
Age (year)	< 55	38	44
	≥ 55	48	56
Gender	Male	48	56
	Female	38	44
Performance	ECOG 0	23	27
	ECOG 1	63	73
T classification	T1	55	64
	T2	31	36
N classification	N0	72	84
	N1	14	16
Stage	I	50	58
	II	22	26
	III	14	16
Grade	Well	52	61
	Moderate-poor	34	39
Invasion depth (cm)	≤ 0.5	48	56
	> 0.5	38	44
Resection margin	Negative	65	76
	Close (< 0.5 cm)	19	22
	Positive	2	2
Lymphovascular invasion	Yes	3	4
	No	83	96
Perineural invasion	Yes	3	4
	No	83	96
Radiotherapy	Yes	14	16
	No	72	84
Op of primary site	Simple excision	11	13
	Hemiglossectomy	66	77
	Wide excision	9	11
Neck dissection	Yes	64	74
	No	22	26

Abbreviations : ECOG = Eastern Cooperative Oncology Group.