Table 4.

Correlation between tumor grading and clinicopathological characteristics.

Characteristics	n	Grade I–II	Conventional grade III	HGT	P-value
Gender					0.15
Male	33 (45.2)	21 (44.7)	8 (66.7)	4 (28.6)
Female	40 (54.8)	26 (55.3)	4 (33.3)	10 (71.4)
Age groups					0.566
≤50y	37 (50.7)	26 (55.3)	5 (41.7)	6 (42.9)
>50y	36 (49.3)	21 (44.7)	7 (58.3)	8 (57.1)
Primary sites					0.641
Major salivary	17 (23.3)	7 (14.9)	4 (33.3)	6 (42.9)
Nasal cavity and paranasal sinuses	15 (20.5)	10 (21.3)	2 (16.7)	3 (21.4)
lip and oral cavity	15 (20.5)	10 (21.3)	2 (16.7)	3 (21.4)
Trachea	9 (12.3)	7 (14.9)	2 (16.7)	0 (0)
Pharynx	7 (9.6)	6 (12.8)	1 (8.3)	0 (0)
External auditory canal	5 (6.8)	3 (6.4)	1 (8.3)	1 (7.1)
Larynx	3 (4.1)	3 (6.4)	0 (0)	0 (0)
Lacrimal gland	2 (2.7)	1 (2.1)	0 (0)	1 (7.1)
PNI					0.169
Negative	12 (16.4)	10 (21.3)	2 (16.7)	0 (0)
Positive	61 (83.6)	37 (78.7)	10 (83.3)	14 (100)
Margin status					0.422
≥1 mm	11 (15.1)	9 (19.1)	1 (8.3)	1 (7.1)
<1 mm	62 (84.9)	38 (80.9)	11 (91.7)	13 (92.9)
T stage					0.127
1–2	20 (27.4)	14 (29.8)	4 (33.3)	2 (14.3)
3	34 (46.6)	25 (53.2)	4 (33.3)	5 (35.7)
4	19 (26)	8 (17)	4 (33.3)	7 (50)
LNM (n = 34)					0.009
Negative	25 (73.5)	20 (87)	3 (75)	2 (28.6)
Positive	9 (26.5)	3 (13)	1 (25)	5 (71.4)
Stage groups					0.039
I–II	19 (26)	14 (29.8)	4 (33.3)	1 (7.1)
III	31 (42.5)	23 (48.9)	4 (33.3)	4 (28.6)
IV	23 (31.5)	10 (21.3)	4 (33.3)	9 (64.3)
PORT (n = 68)					0.664
Yes	39 (57.4)	27 (61.4)	6 (50)	6 (50)
No	29 (42.6)	17 (38.6)	6 (50)	6 (50)

HGT, high-grade transformation; PNI, perineural invasion; LNM, lymph node metastasis; PORT, postoperative radiotherapy.