Fig. 2: Lower limit of detection (LOD) of various PD-L1 assays (x axis).
From: Quantitative comparison of PD-L1 IHC assays against NIST standard reference material 1934
Lower numbers (on the y axis) equate to greater sensitivity. Each dot represents a separate IHC laboratory test. Blue dots depict FDA-cleared assays in clinical laboratories, green dots for laboratory-developed tests (LDTs), and red diamonds for FDA-cleared assays as performed by a reference laboratory. Tissue staining in Fig. 2 was performed by these reference labs. For enhanced clarity, the LDT data are positioned slightly to the right of the vertical lines.
