Studies were missing from body of evidence, resulting in an over- or underestimate of true effects from exposure.
The number of included trials in this review was too small to conduct any sufficient additional analysis of publication bias
Afterward, several exploratory analyses were conducted to detect the presence of publication bias
It is also possible that the mixture of significant and nonsignificant findings offset potential publication bias
for this study.
To assess the influence of publication bias
on the findings, a funnel plot was constructed based on the 10 studies.
The second aim of Meta analysis is to examine the possibility of publication bias
To investigate publication bias
, a funnel plot was generated, using the datasets from the included clinical trials.
was evaluated through funnel plots and Egger's linear regression test, with six studies demonstrating no publication bias
In some cases, these may be trials with negative or nonsignificant results would introduce a publication bias
, also known as file-drawer bias.
Tests for publication bias
and heterogeneity did not reach statistical significance.
Previous surgical mortality estimates have been based mostly on self-report and literature review, with the risk of reporting bias, recall bias, and publication bias
The existing literature is also limited by publication bias
and many studies are underpowered to detect quality-of-life differences.