Table 2.

PD-L1 expression using immunohistochemistry with 22C3 and E1L3N clones

	TC0	TC1	TC2	TC3	κ	IC0	IC1	IC2	IC3	κ
E1L3N	68	4	1	1	0.831	60	12	2	0	0.818
22C3	69	3	1	1		60	11	3	0

PD-L1 positive tumor cells: < 1% (TC0), 1–4% (TC1), 5–49% (TC2) and > 50% (TC3)

PD-L1 positive immune cells: < 1% (IC0), 1–4% (IC1), 5–10% (IC2) and > 10% (IC3)