Figure 3.

Comparison of the MCI subgroups using PET uptake data

Bar plots show the comparison of A $\beta$-PET (A) and FDG-PET (C) uptake between the MCI-AD and MCI-CN subgroups. In both measurements, group differences were statistically significant. Pie charts depict the proportion of subjects in the MCI-AD and MCI-CN subgroups with normal and abnormal A $\beta$-PET (B) and FDG-PET (D). The distributions of normal and abnormal PET uptake values were significantly different between the two subgroups (Aβ-PET: ${\chi }^2$ = 12.35, p < 0.001; FDG-PET: ${\chi }^2$ = 14.70, p < 0.001). Bar graphs depict means $\pm$ SEs. AD, Alzheimer’s disease; CN, cognitively normal; MCI, mild cognitive impairment; A $\beta$-PET, beta-amyloid positron emission tomography; FDG-PET, fluorodeoxyglucose-positron emission tomography. ∗∗∗p < 0.001