Table S2.

Summary for logistic regression analysis of factors associated with EGFR gene status in lung adenocarcinoma

Clinicopathological features	Total lung adenocarcinoma (n=424)			Biopsy specimen (n=298)			Surgical specimen (n=126)
OR	95%CI	P	OR	95%CI	P	OR	95%CI	P
Gender	0.276	0.159-0.479	0.000*	0.240	0.125-0.458	0.000*	0.591	0.180-1.936	0.385
Smoking status	1.583	0.902-2.779	0.109	0.360	0.706-2.605	0.360	3.323	0.973-11.350	0.055
Pathological degree	0.453	0.277-0.741	0.002*	0.516	0.296-0.899	0.019*	0.165	0.040-0.680	0.013*

Note: *P<0.005.

Abbreviations: CI, confidence interval; OR, odds ratio.