Fig 1.
Flow diagram of the literature search and study selection for the meta-analysis.
The flow diagram shows eligible publications at each stage of the analysis process. The database search was conducted in December 2016.
Table 1.
Characteristics of the studies included.
Table 2.
Detection of the PD-L1 expression in TIICs in the selected studies.
Fig 2.
Forest plot shows the associations between PD-L1 expression in TIICs and five year overall survival of cancer patients.
Fig 3.
Subgroup analysis by different cutoff values shows the associations between PD-L1 expression in TIICs and five year overall survival of cancer patients.
Fig 4.
Forest plot of hazard ratios shows the associations between PD-L1 expression in TIICs and cancer prognosis.
Fig 5.
Forest plot of hazard ratios form subgroup analysis by different cutoff values shows the associations between PD-L1 expression in TIICs and cancer prognosis.
Fig 6.
Forest plot of hazard ratios form subgroup analysis by different types of pathological sections shows the associations between PD-L1 expression in TIICs and cancer prognosis.
TMAs, tissue microarrays.
Fig 7.
Forest plot of hazard ratios form subgroup analysis by different ethnicity shows the associations between PD-L1 expression in TIICs and cancer prognosis.
TMAs, tissue microarrays.
Fig 8.
Begg’s funnel plots show the publication bias.
(A) Begg’s funnel plot for 5-years OS (B) Begg’s funnel plot for HR.