The long-term risk of endoleak-related-complications may be falsely elevated according to a competing risk analysis.

The development of long term complications after vascular surgery has long been evaluated with Kaplan–Meier (KM) and Cox analyses. The use of these statistical methods in such circumstances, however, implies the observance of requirements sometimes overlooked by researchers and reviewers. One of them is the absence of competing events. The KM estimator assumes that all patients eventually will experience the procedure related complication that is being studied, which is clearly incorrect because some patients will die before any such complication occurs. 1 Austin P.C. Lee D.S. Fine J.P. Introduction to the analysis of survival data in the presence of competing risks. Circulation. 2016; 133: 601-609 Crossref PubMed Scopus (1342) Google Scholar Navigating the Twist and Turn: Deciphering Misalignment in FEVAREuropean Journal of Vascular and Endovascular SurgeryPreviewFenestrated endovascular aortic repair (FEVAR) relies on the precise alignment of the fenestrations with their respective target vessels with bridging stents. This requires careful planning, accurate device deployment, and durability of the position during follow up. We would like to congratulate Squizzato et al.1 for their important contribution to the understanding of fenestration misalignment. Full-Text PDF