Figure 1. Percentage of participants with PiB(+) PET scan according to IR group and APOE ε4 genotype.

PiB positive is defined as PiB composite standardized uptake value ratio score >1.5. OR for PiB(+) PET scan in the IR+ group, compared to the IR− group, assessed with unadjusted logistic regression analysis. The p_trend for increasing prevalence of PiB(+) PET scan according to IR group and APOE genotype, assessed with Pearson χ² test. (A) n = 30 in each group; (B) n = 15 in each group. IR = insulin resistance; OR = odds ratio; PiB = Pittsburgh compound B.