Figures & data
Figure 1 Flowchart of the selection of the studies in the meta-analysis.
![Figure 1 Flowchart of the selection of the studies in the meta-analysis.](/cms/asset/139fec64-6174-4abc-8228-90b4605f8d5d/dott_a_138044_f0001_c.jpg)
Table 1 Characteristics of included studies for meta-analyses
Figure 2 Forest plot of HR for the association of PD-L1 overexpression and OS.
Abbreviations: CI, confidence interval; HR, hazard ratio; OS, overall survival.
![Figure 2 Forest plot of HR for the association of PD-L1 overexpression and OS.](/cms/asset/2bcef32b-1f77-43c8-98be-0b93a14b6c23/dott_a_138044_f0002_b.jpg)
Table 2 Main meta-analysis results for OS
Figure 3 Forest plot of HR for the association of PD-L1 overexpression and RFS.
Abbreviations: CI, confidence interval; HR, hazard ratio; RFS, recurrence-free survival.
![Figure 3 Forest plot of HR for the association of PD-L1 overexpression and RFS.](/cms/asset/60f3af29-4ff6-4a94-a6ac-4031d4e003e8/dott_a_138044_f0003_c.jpg)
Figure 4 Forest plot of HR for the association of PD-L1 overexpression and DFS.
Abbreviations: CI, confidence interval; DFS, disease-free survival; HR, hazard ratio.
![Figure 4 Forest plot of HR for the association of PD-L1 overexpression and DFS.](/cms/asset/c0deca02-b537-4aa0-af83-fdf2205bcbb1/dott_a_138044_f0004_c.jpg)
Table 3 Main meta-analysis results for DFS
Figure 5 Sensitivity analysis of pooled HRs on the association between PD-L1 expression and OS.
![Figure 5 Sensitivity analysis of pooled HRs on the association between PD-L1 expression and OS.](/cms/asset/da6c54b2-3594-460a-94ea-1bf666fe6ccd/dott_a_138044_f0005_b.jpg)
Table 4 Meta-regression analyses of potential source of heterogeneity
Figure 6 Funnel plots of publication bias for all the included studies reported with OS.
![Figure 6 Funnel plots of publication bias for all the included studies reported with OS.](/cms/asset/8a5e69df-2e48-448a-a422-4e6be0666e3a/dott_a_138044_f0006_b.jpg)