Figure 2.

Intimal thickening of arcuate and interlobular arteries. (a) Arterial intimal thickening for arcuate (Itc) and interlobular (Itr) arteries. Linear regression showing the relationships between age and Itc (r = 0.58, P < 0.001, coefficient = 0.961) and age and Itr (r = 0.48, P < 0.001, coefficient = 0.791). The coefficients represent the percent increase in intimal thickening per year after 18 years old. All subjects are included. The slopes of the regressions are not significantly different (P = 0.98). (b) Intimal thickening of arcuate (Itc) versus interlobular arteries (Itr). Linear regression between Itc and Itr. The relationship is shifted to the right and downward along the x-axis, indicating that Itc begins somewhat before and is more pronounced than Itr in the early development of arteriosclerosis.