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. 2021 Nov 10;3(1):vdab166. doi: 10.1093/noajnl/vdab166

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© The Author(s) 2021. Published by Oxford University Press, the Society for Neuro-Oncology and the European Association of Neuro-Oncology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 2. — Forest plots of various cutoff levels of PD-L1 expression in tumor cells (TC) for primary lung tumor and brain metastasis (BM): (A) Lung PD-L1 <1%; (B) BM PD-L1 <1%; (C) Lung PD-L1 1–50%; (D) BM PD-L1 1–50%; (E) Lung PD-L1 >50%; (F) BM PD-L1 >50%. The square boxes correspond to proportions from each study and the size of the box corresponds to the weight of each study, and horizontal line represents 95% confidence interval (CI). The diamonds are pooled estimates of the outcomes with 95% CI.