3.4. Publication bias
Based on the Egger’s test and the visual inspection of the funnel plots, which revealed asymmetries, the sources of publication bias are almost all the reported postoperative outcomes in our results (p <0.050 for all outcomes) except for in-hospital mortality (p = 0.254) and FLT at the level of AA (p = 0.703). All Funnel plots are provided as Supplemental Figures 2A-K .