Table 2.

Retrospective cohort description

Variable	Group	N	% of cohort (%)
Age	[30, 40)	1	0.4
	[40, 50)	5	2.0
	[50, 60)	40	16.0
	[60, 70)	105	42.0
	[70, 80)	75	30.0
	[80, 90)	23	9.2
	[90, 100)	1	0.4
Sex	Female	136	54.4
	Male	114	45.6
Tumor type	NSCLC	250	100.0
Histology type	Non-squamous	213	85.2
	Squamous	37	14.8
Treatment group	Pembro. + chemo	148	59.2
	Pembrolizumab	102	40.8
All samples		250	100.0