9 phenotypic PCs were retained in the parallel analysis. Eigenvalues and a Scree plot of the retained components are available in Supplemental Table VIII and Supplemental Figure 2. Change R2 values for the PRS from each model are presented in Table IV. Standardized coefficient estimates for PRS and EDU from each model are presented in Table V. Figure 4 displays change in the standardized coefficient estimates for PRS.
