Fig. 3: Brain structural connectivity mediates the association between polygenic score for tumor necrosis factor-α (TNF-α PGS) and processing speed in acutely depressed patients.

The figure depicts the mediation model with TNF-α PGS as a predictor variable, structural brain connectivity (measured by mean fractional anisotropy) as a mediator variable, and processing speed as an outcome variable in acutely depressed patients. A higher processing speed score represents higher processing speed performance. Unstandardized coefficients and standard errors for each path of the mediation model are presented. Note that c represents the direct effect and c‘ the indirect effect. * indicates significance at p < 0.05.