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. 2022 Oct 20;12:945915. doi: 10.3389/fonc.2022.945915

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Copyright © 2022 Guo, Pi, Gao, Li, Li, Feng and Cao

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Kapan–Meier curves of OS and PFS before PSM. (B) Kapan–Meier curves of OS and PFS after PSM. OS, overall survival; PFS, progression-free survival; PSM, propensity score matching.