Fig. 2.

Correlation matrix of age and brain-age predicted by 6 different modalities. Bivariate correlations between chronological age and brain-age values derived from each of the 6 neuroimaging modalities, in the validation set (n = 520). Values are Pearson's r for each pairwise correlation. Darker blue colors indicate higher positive correlations. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)