Fig. 2
From: VMAT2 availability in Parkinson’s disease with probable REM sleep behaviour disorder
This interaction plot is a result from the regression analysis. Patient group moderates the left caudate BPND in PD patients without probable RBD (PD-RBD−): as the UPDRS-III score increases, PD-RBD− patients have lower VMAT2 availability. However, this relationship is non-existent for PD patients with probable RBD (PD-RBD+). This figure was plotted using marginal means that accounted for the included co-variates: sex, MoCA and BDI. The grey band for each line represents the 95% confidence interval