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. 2021 Jan 5;8:605879. doi: 10.3389/fped.2020.605879

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Copyright © 2021 Liu, Zhu, Li and Shi.

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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Results of neonatal characteristics in primary analysis. (A) Forest plot of association between PDA and small for gestational age; (B) funnel plot for publication bias of the association between PDA and small for gestational age; (C) forest plot of association between PDA and male gender (according to unadjusted data); (D) funnel plot for publication bias of the association between PDA and male gender (according to unadjusted data); (E) forest plot of association between PDA and male gender (according to adjusted data). PDA, patent ductus arteriosus.