We also evaluated the attenuation in the incremental R2 of the polygenic score in predicting EduYears when we control for available demographic variables one at a time: marital status, household income, mother’s education, and father’s education. We next controlled for both mother’s and father’s education, and finally, we controlled for the full set of demographic controls. The results of this analysis are shown in Supplementary Table 39B and Supplementary Figure 12.
