Figure 3.

Box plots of variables that were not selected in the penalized multinomial logistic regression model as useful for differentiating disease groups, and hence not shown in Fig. 2. All regional grey matter volumes were divided by whole brain volume to correct for differences in global atrophy between subjects. This step was performed because we were interested in assessing the relative involvement of each region, without confounds of global severity. L = left; R = right; ROI = region of interest.