Fig. 2
From: Efficacy of PD-1 & PD-L1 inhibitors in older adults: a meta-analysis
Forest plot for OS. Studies are listed on the left and HR with 95% CI are on the right. Box sizes are inversely proportional to the standard error of the study; therefore, larger boxes indicate greater weight of the trial in the meta-analysis estimation. The HR from the Robert 01–201531 trial is lower than the others, but the weight of the trial is small and does not have great influence