The moderating effect of heart rate variability on the relationship between alpha asymmetry and depressive symptoms.

For the parietal region, the regression model (F (16) = 2.291, p = .038) of hierarchical regression analyses revealed significant interaction effect between low-band alpha asymmetry index at P5-P6 and HF ( β = .485; p = .018), and marginally significant interactions between low-band alpha asymmetry index at P3-P4 and LF/HF ( β = -.419; p = .074) and P5-P6 and LF/HF ( β = .412; p = .072) on the BDI score for MDD patients ( Table 2 , Fig. 1 ).

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