In Model I, Group 1 offspring were at a 58% increased hazard of transitioning from alcohol use to AD, compared to Group 4 (see Table 4). Risk to offspring in Groups 2 and 3 was non-significant. Group 1 risk was greater than that for Group 3, but other group differences non-significant. A similar pattern was observed when parental separation was included in Model II, where the effect of parental separation on timing of AD was non-significant. In Model III, offspring in Groups 1 and 2 were at 59% and 79% increased hazards of transitioning from use to AD, respectively. Risk to Group 3 offspring was non-significant, as were differences among Groups 1–3. Parental separation predicted a 35% decreased hazard of transitioning to AD. Interactions between father DD/AD and parental separation were tested by adding an interaction term to Models II and III; no interaction terms were significant (p > 0.05).
