Table III.

Patient characteristics.

		EGFR mutation status detected by ddPCR
Variable	n (%)	Mutant	Wild-type
Sex
Female	35 (45)	24	11
Male	42 (55)	11	31
Age
≥60 years	46 (60)	15	31
<60 years	31 (40)	20	11
Smoking history
Ever-smoker	33 (43)	9	24
Never-smoker	40 (52)	26	14
Uncertain	4 (5)	0	4
Disease stage
I	7 (9)	5	2
II	26 (34)	12	14
III	10 (13)	5	5
IV	25 (32)	12	13
Uncertain	9 (12)	1	8
EGFR mutation type
19Del	21 (27)	21	0
L858R	12 (16)	12	0
19Del+T790M	2 (3)	2	0
Wild-type	42 (54)	0	42
Histopathology type
Adenocarcinoma	77 (100)	35	42
Total n	77	35	42

EGFR, epidermal growth factor receptor; ddPCR, droplet digital polymerase chain reaction; 19Del, exon 19 deletion.