Figure 3.

Moderation of the relationship of social support and changes in substance use by level of executive impairment. In the Negative Support class, more severe executive dysfunction at the end of treatment (controlling for baseline impairment) predicted poorer substance-use outcomes (increase in percentage of days of use) across the first 12 months after treatment entry. Conversely, in the Frequent Positive Support class, more severe executive function impairment at the end of treatment (controlling for baseline impairment) predicted better substance-use outcomes (decrease in percentage of days of use) across 12 months.