The Frequency of Epidermal Growth Factor Receptor Mutation of Nonsmall Cell Lung Cancer according to the Underlying Pulmonary Diseases

Table 2

Patient characteristics and EGFR mutation status.

	Number	EGFR mutation (𝑛, %)	𝑃-value
Gender
Male	112	17, 15.2%	𝑃<0.0001
Female	86	35, 40.7%
Age
<65	80	23, 28.8%	𝑃=0.5156
65≤	118	29, 24.6%
Histology
Adenocarcinoma	169	50, 29.6%	𝑃=0.0107
Nonadenocarcinoma	29	2, 6.9%
Smoking status
Never	74	29, 39.2%	𝑃=0.0139
Ex/Current	124	23, 18.5%
Clinical stage of NSCLC
I-IIIA	63	21, 33.3%	𝑃=0.1649
IIIB-IV	135	31, 22.9%
Chest CT
Normal	122	43, 35.2%	𝑃=0.0011
Emphysema	59	8, 13.6%
Fibrosis	17	1, 5.8%