2.

EGFR 19和21外显子突变患者临床特征的比较

Different clinical features between exon 19 and 21 mutations

Parameters		EGFR mutation		Z/χ2	P
		Exon 19 (n=56)	Exon 21 (n=57)
Age (yr)		57.02±11.31	62.25±7.76	-2.451	0.014
Gender	Male	19 (33.9%)	24 (42.1%)	0.801	0.371
	Female	37 (66.1%)	33 (57.9%)
Somke status	Never	41 (73.2%)	41 (71.9%)	0.023	0.878
	Ever	15 (26.8%)	16 (28.1%)