Table 2. Staining patterns of EGFR.

		Staining patterns (N = 29)
Cell membrane		0	1	2	3	Average	P
Tis (in situ)	N = 15	0	4	11	0	1.73	0.93
Tadv (invasive)	N = 14	1	3	9	1	1.71
					total	1.72
Benign tumor	N = 7	1	4	2	0	1.28	0.30
Cell cytoplasm		0	1	2	3	Average	P
Tis (in situ)	N = 15	0	9	5	1	1.46	0.90
Tadv (invasive)	N = 14	0	10	1	3	1.5
					total	1.48
Benign tumor	N = 7	6	1	0	0	0.14	<0.01*

*p value based on the non-paired t-test.