Normalized intimal thickness by (axial) location and selected P values from a Bonferroni's multiple comparison test. The boxes denote the range between lower and upper quartile. The horizontal lines within the boxes denote the median value and the whiskers the range of the data. IT normalization by patient-specific mean IT (BR, IR, and IIMA mean thickness). SC – Supraceliac, BR – Branch Region, IR – Infrarenal, IIMA – InfraIMA, CI – Mean of Common Iliacs, LCI – Left Common Iliac, RCI – Right Common Iliac, NLCI – Near Bifurcation LCI, NRCI – Near Bifurcation RCI. See Schematic. The supraceliac region is defined as the superior portion of the celiac branch point to 3.5 cm proximal of it. The NRCI and NLCI regions are subsets of the RCI and LCI regions and defined as the area in the common iliac arteries within 1.0 cm of the abdominal aortic bifurcation.