Table 3. Comparison of the EGFR mutation rates for small biopsy and surgical specimens.

		Total cases	mutation cases	mutation rate	P
Male	Surgical specimens	112	33	29.5%	0.661
	Small biopsy specimens	325	103	31.7%
Female	Surgical specimens	59	39	66.1%	0.246
	Small biopsy specimens	225	130	57.8%
Adenocarcinoma	Surgical specimens	139	70	50.4%	0.787
	Small biopsy specimens	416	204	49%
Squamous carcinoma	Surgical specimens	23	2	9.4%	0.920
	Small biopsy specimens	96	9	10.4%
19-Del	Surgical specimens	171	40	23.4%	0.490
	Small biopsy specimens	550	115	20.9%
L858R	Surgical specimens	171	30	17.5%	0.634
	Small biopsy specimens	550	88	16.0%