Summary of agreement between PD-L1 IHC 22C3 and 28-8 assays
| All biopsies (n=1930) n (%) | Biopsies with a confirmed lung cancer diagnosis (n=412) n (%) | |
| PD-L1 IHC difference 0%–10% | 1825 (94.6) | 393 (95.4) |
| PD-L1 IHC difference 11%–20% | 60 (3.1) | 10 (0.5) |
| PD-L1 IHC difference >20% | 45 (2.3) | 9 (2.2) |
| PD-L1 IHC difference 22C3=28-8 | 1589 (82.3) | 340 (82.5) |
| PD-L1 IHC difference 22C3<28-8 | 132 (6.8) | 27 (6.6) |
| PD-L1 IHC difference 22C3>28-8 | 209 (10.8) | 45 (10.9) |
IHC, immunohistochemistry; PD-L1, programmed death ligand 1.