Table 1.

Demographic and tumor‐related characteristics of 95 patients

Parameter	No. of patients	%
Age (median, year)	57	30–77
BMI (kg/m2)	24.05	15.81–34.48
Gender
Female	64	67.4
Male	31	32.6
Pathologic variables
Adenocarcinoma	95	100
Non‐adenocarcinoma	0	0
Location of sample
Primary lesion	77	81.1
Metastatic lesion	18	18.9
Smoking history
Never smoked	71	74.7
Ex‐smoker or current smoker	24	25.3
Timing of treatment
First‐line	47	49.4
Subsequent	48	50.5
Involvement of metastases sites
Brain	13	13.7
Liver	8	8.4
Bone	38	40
Adrenal	4	4.2
Pulmonary	41	43.2
Other sites	41	43.2
EGFR mutation status
18	2	2.1
19	49	51.6
20	13	13.7
21	44	46.3

BMI, body mass index; EGFR, epidermal growth factor receptor.