Research Paper Volume 11, Issue 24 pp 12568—12580
Prognostic role of programmed death-ligand 1 expression in patients with biliary tract cancer: a meta-analysis
Figure 2. Forest plots for the association between PD-L1 expression and overall survival (OS) categorized by different subgroups: (A) the entire patient group; (B) patients with eCCA, iCCA, iCCA+eCCA, or GBC; (C) patients with Asian ethnicity or Caucasian ethnicity; and (D) studies with sample size ≥100 or sample size <100. Note: The right-side means “High PD-L1 predicts poor survival” and the left-side means “High PD-L1 predicts better survival”.