Table 2.

Correlation between TRPA1 expression levels and important clinicopathologic variables.

Parameter	Category	TRPA1 expression level		P-value
		Low	High
Gender
	Male	48	47	0.832
	Female	14	15
Age (years)
	< 60	47	51	0.378
	≥ 60	15	11
Primary tumor (T)
	T1-T2	47	33	0.009*
	T3-T4	15	29
Nodal status (N)
	N0-N1	33	23	0.071
	N2-N3	29	39
Stage
	I-II	25	13	0.019*
	III-IV	37	49
Histological grade
	Keratinizing	3	2	0.445
	Non-keratinizing	30	24
	Undifferentiated	29	36

*, Statistically significant.