Fig. 1.

Offset scatter plots showing relationships between FH density (number of biological parents and grandparents with alcohol and other substance use disorders) and the three component scores with means for each FH density grouping shown in red. For a listing of measures comprising each component, please see Table 3. A significant effect of FH density was observed for all three components (p < 0.0001). Those with 0 family members with substance use disorders were significantly different from those with a FH density of 1 or more for all three of the component scores (Fig. 1). In addition, Component 2 and 3 scores were lower in individuals with a FH density of 1 versus 2+ (Component 2: p = 0.003, Component 3: p = 0.01), but this difference was not observed for Component 1 scores (p = 0.31).