Consistent with the last point, we also examine whether PGS of psychiatric stage-based phenotypes are related to specific alcohol milestones and whether PGS of alcohol consumption and problematic use are differentially related to these stage-based phenotypes. We hypothesize that externalizing phenotypes will be broadly and reciprocally associated with all alcohol milestones, and that internalizing and EF will be primarily bidirectionally associated with later/more severe alcohol stages.
