Association between aortic peak wall stress and rupture index with abdominal aortic aneurysm–related events

Fig. 1. Example of a three-dimensional (3D) segmentation produced using finite element analysis on the computed tomography image of an AAA

Fig. 2. Kaplan–Meier curves illustrating the freedom from AAA events according to tertiles of peak wall stress (PWS) and peak wall rupture index (PWRI). a PWS; b PWRI. Differences between both groups compared using the log-rank test (p = 0.001 and p < 0.001 for PWS and PWRI respectively)

Fig. 3. Classification and regression tree analysis (CART) for AAA events. Variables different (p < 0.100) between participants who had events and those who did not have events (age, statin prescription, peak wall stress [PWS], peak wall rupture index [PWRI], and AAA diameter) were entered into the analysis. The maximum p-value for a split was set at 0.050. N, numbers of individuals in subgroup; F, events; HR, hazard ratio

Fig. 4. Freedom from AAA events stratified by initial peak wall rupture index (PWRI). The optimal PWRI cut-off was determined by classification and regression tree analysis. Differences between both groups were compared using the log-rank test (p < 0.001)