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Table 2 Summary of clinical outcomes from systematic review

From: Prognostic effect of programmed death-ligand 1 (PD-L1) in ovarian cancer: a systematic review, meta-analysis and bioinformatics study

  Studies HR with 95% CI P heterogeneity P values N
Overall survival 7 1.13 (0.63–2.04) 0.001 0.673 835
Progression-free survival 5 1.18 (0.70–1.98) 0.001 0.532 495
Disease-specific survival 1 0.607 (0.399–0.925) NA 0.02 195
Disease-free survival 1 NA NA > 0.05 112
  1. HR hazard ratio, 95% CI 95% confidence interval, NA not applicable, N the number of the study population