Table 1. Crosstabulated EGFR immunostaining location classes vs stages.

	Stage
EGFR staining location	1	2	3	4
No staining	11	4	5	11
	20.4%	26.7%	17.9%	29.7%
Membranous staining	19	12	11	4
	35.2%	13.3%	39.3%	10.8%
Cytoplasmic staining	24	9	12	22
	44.4%	60.0%	42.9%	59.5%
	100%	100%	100%	100%

No statistical associations, P=0.091, Fisher's exact test.