Fig. 4

a Concordance of scoring tumor cell PD-L1 expression in SCC and adenocarcinomas using Fleiss’ kappa statistics at 1%, 5%, 10%, 25%, and 50% cutoffs; Comparison between image analysis and pathologist scores in PD-L1(SP263) SCC cases (b) and adenocarcinoma cases (c); Comparison between image analysis and pathologist scores in PD-L1(22C3) SCC cases (d) and adenocarcinoma cases (e). PD-L1 programmed death-ligand 1, SCC squamous cell carcinomas, Ad adenocarcinomas, AI artificial intelligence