Table 1. Clinico-pathological features of the study population.

Feature	Grouping	N	%
Age (years)	Median	65.2	–
Sex	Male	9	41
	Female	13	59
Smoking status	Current/ex	9	41
	Never	13	59
ECOG performance status	0	7	32
	1	12	55
	2	3	14
Histology	Adenocarcinoma	22	100
Stage at first diagnosis	III	4	18
	IV	18	82
EGFR mutation	Deletion exon 19	12	55
	L858R	10	45
1st Stage IV treatment	Afatinib	10	45
	Erlotinib	4	18
	Gefitinib	5	23
	Other	3	14

EGFR, epidermal growth factor receptor.