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. 2024 Dec 19;11:1515585. doi: 10.3389/fsurg.2024.1515585

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© 2024 Niu, Zu, Shang, Gao, Miao and Zhang.

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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Propensity score and proportion of confounders before and after PSM. (A) Propensity score and proportion of confounders before PSM in aspirin group. (B) Propensity score and proportion of confounders after PSM in aspirin group. (C) Propensity score and proportion of confounders before PSM in control group. (D) Propensity score and proportion of confounders after PSM in control group.