Table 1.

Paired-t Test Between Normal and Tumor Tissues for Different Expression of Nrf2, MRP1, NQO1, cmyc, and p53

		Optical Density of DAB stain			Percentage of positive malignant cells
Variables	total	Mean±SD	Fold change (tumor/normal)	P	Mean±SD	Fold change (tumor/normal)	P
Nrf2			1.725	<0.001		2.523	<0.001
normal	76	0.032±0.017			0.176±0.140
tumor	76	0.054±0.042			0.443±0.370
MRP1			1.734	<0.001		1.369	<0.001
normal	76	0.082±0.047			0.665±0.249
tumor	76	0.142±0.065			0.911±0.111
NQO1			2.437	<0.001		6.149	<0.001
normal	76	0.020±0.011			0.059±0.149
tumor	76	0.049±0.047			0.363±0.379
cmyc			2.102	<0.001		1.425	<0.001
normal	76	0.043±0.023			0.473±0.253
tumor	76	0.091±0.047			0.674±0.300
p53			2.288	<0.001		8.728	<0.001
normal	76	0.078±0.051			0.089±0.130
tumor	76	0.179±0.100			0.780±0.310