Figure 1.
Comparisons of regional CBF and cerebrovascular resistance index (CVRi). (A) Mean regional CBF and (B) mean CVRi, for Alzheimer’s disease (AD), non-demented amyloid-positive (Aβ+), and amyloid-negative (Aβ−) groups. Reduced regional CBF was observed for AD and Aβ+ participants relative to Aβ− participants. Highest CVRi was observed in AD, intermediate CVRi in Aβ+, and lowest CVRi in Aβ− participants. L = left; R = right; hipp = hippocampus. *P < 0.05; **P < 0.01. Error bars represent ± 1 standard error.