Table 1.

Comparisons of EGFR expression.

Measure	Comparison performed	p-value*
Staining Intensity	Benign vs. Atypical vs. Malignant	p = 0.002
	(Benign + Atypical) vs. Malignant	p < 0.001
Percentage Staining	Benign vs. Atypical vs. Malignant	p = 0.029
	(Benign + Atypical) vs. Malignant	p = 0.009
HIS	Benign vs. Atypical vs. Malignant	p = 0.004
	(Benign + Atypical) vs. Malignant	p < 0.001

* p-value based on Wilcoxon exact tests (see Methods).