Figure 1.

Adjusted coefficients of coefficient of partial determination ${\overline{R}}_p^2$ for the 46 structures with the largest ${\overline{R}}_p^2$ values included in the sex-agnostic ridge regression model estimating age using regional volumes. Plotted are adjusted ${\overline{R}}_p^2$ values, expressed as percentages of the total variance ${\overline{R}}^2$ explained by the full model that includes all predictors (regions or structures). Cortical structures are plotted in darker hues (blue online); extra-cerebral structures, including the subcortex, cerebellum, and brainstem, are plotted in lighter hues (orange online).