BDNF and hippocampal atrophy: The RBMT score was negatively correlated with hippocampal atrophy (i.e., higher ZAdvance score) (Pearson correlation coefficient r = 0.380, p < 0.001), while the RBMT score was positively correlated with BDNF (r = 0.203, p = 0.001) (Fig. 2A, B).