Table 15. Age differences in EGFR gene mutation types.

Gene mutation types	≥60 years			<60 years		P value
	Cases	Mutation rate (%)		Cases	Mutation rate (%)
Exon 19	11	50.00		14	51.85	0.8974
Exon 20	5	22.73		7	25.93	0.9402
Exon 21	8	36.36		11	40.74	0.9856
Amplification	6	27.27		7	25.93	0.8266