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. 2023 Oct 26;11:1287421. doi: 10.3389/fpubh.2023.1287421

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Copyright © 2023 Sun, Su, Bu 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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Funnel plot of included studies. The vertical line marks the overall Cohen’s d. The figure is contour enhanced using conventional benchmarks for statistical significance.