Table 3. Comparison of the characteristics in EGFR mutant/wild status and the Ki-67 PI high/low expression.

Characteristics	EGFR mutant/wild-type status	Ki-67 PI high/low expression
Gender	NS	P=0.019
Age	NS	NS
Smoking status	P=0.003	P=0.001
Tumor location	NS	NS
CT pattern	NS	NS
Histological type	P<0.001	P=0.001
Stage	NS	P=0.005

NS, not significant; EGFR, epidermal growth factor receptor; PI, proliferation index; CT, computed tomography.