In order to better visualize these two significant interactions, a series of tables (not shown) for the occurrence of AUD across adulthood was created using dichotomized subgroups of the component covariates of the interactions. For these analyses, FH was still treated as a binary category (FHN/FHP), while the age of drinking onset (<age 15 vs. 15+) and the T1 drinking quantity (< 3 vs. 3+) were dichotomized using a median split on each variable. For each significant interaction, four subgroups were created from the variables described above, with the survival function then calculated for each subgroup individually and graphed over time. Figure 3 describes the development of AUDs over time by four combinations of the FH and T1 drinking quantity groupings. If alcohol intake at ~age 20 was low, the survival rate (i.e. those not diagnosed with an AUD by T25) was ~78% regardless of the FH. The impact of FH, however, was apparent among the high T1 drinking quantity group where the survival rate was lower for FHP (34%) compared to FHN (58%). Figure 4 illustrates the survival curves
