FIGURE 1.

Associations between adolescent cannabis exposure and FA of the cingulum and ATR at age 20. Significant associations were observed between adolescent cannabis exposure group and FA of both the cingulum and anterior thalamic radiations. For the cingulum, Bonferroni-corrected pairwise post hoc tests demonstrated that FA of the moderate adolescent use group was significantly higher than the heavy adolescent use group (p_corrected < 0.05). For the anterior thalamic radiations, Bonferroni-corrected pairwise post hoc tests demonstrated that the moderate use and low or no use groups differed significantly (p_corrected < 0.05), as did the moderate and heavy use groups (p_corrected < 0.01). *indicates significant Bonferroni-corrected post hoc pairwise tests.