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Assessment of publication bias

WJ Wentao JI
XZ Xiaoting Zhang
GS Guolin Sun
XW Xiandong Wang
JL Jia Liu
JB Jinjun Bian
LB Lulong Bo
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A funnel plot will be used to assess publication bias when 10 or more RCTs are available for quantitative analysis. Egger test will be performed if included studies are less than 10.19 For Egger’s test, p value of greater than 0.05 was determined as no significant publishing bias or small-study effects in studies. As funnel plot asymmetry does not necessarily suggest reporting bias, we will attempt to recognise potential causes for the asymmetry, including poor methodological quality and true heterogeneity of studies.

Copyright and License information:  ©2021-08-23 Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.
This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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