Figure 2. Forest Plots of Results of Random Effects Analysis for Pairs of Histopathologic Risk Factors and Local Recurrence, Nodal Metastasis, and Disease-specific Death Identified in More Than 1 Study.

Circles denote the composite risk ratio; whiskers, the 95% CIs. EGFR indicates epidermal growth factor receptor, and PD-L1, programmed death ligand-1.