Grey Relational Analysis of Benefit of Surgical Management for Abdominal Aortic Aneurysm

Abstract

Patients in the open repair group required larger volumes of intraoperative blood transfusion than those in EVAR (P , 0.001), and they had more of a trend of cardiac failure after surgery than those in the EVAR group. The operative mortality was similar in both groups. On follow-up, the all-cause mortality and the rates of ischemic legs within 5 years had no significant differences between the 2 procedures (P . 1-7 These trials showed that EVAR is superior to open surgery in terms of operative mortality in the short term, and there were no differences in mortality or aneurysm-related mortality in the long term. However, any possible longterm benefit from EVAR versus open surgical repair for abdominal aortic aneurysm (AAA) has not been proven, 2 and the data of long-term mortality rate after repair surgery are limited. It is necessary to study this issue to get a clear answer.

Investigation of the High-Temperature and Rheological Properties for Asphalt Sealant Modified by SBS and Rubber Crumb

“…Therefore, the grey correlation degree was used to further analyze the basic data. Grey correlation analysis is an academic analysis method for multi-factor degrees of correlation and the comparison of data development trends [43,44], and has been successfully applied in agronomy, medicine, management, and business [45,46]. In this paper, the softening point was selected as the reference sequence, and the correlation degree between CR, SBS content, and high-temperature performance in a single-component modified asphalt sealant was analyzed using the grey correlation analysis method.…”

“…For each evaluation object, the mean value of the correlation coefficient between each index and the corresponding element of the reference sequence is calculated to reflect the relationship between each evaluation object and the reference sequence; this is referred to as the correlation sequence, and is determined using Equation (3) [44]:…”