Figure illustrates the effect of cannabis exposure moderated by CNR1 variation. Analysis of the rs806368 and rs1049353 haplotype showed a significant interaction between the presence of any TA within this haplotype and cannabis exposure (F=7.08, df=2, 64.7, p=0.002). A linear model in which the number of TA variants was tested was also significant (F=4.97, df=2, 64.24, p=0.004). The rs806368 and rs1049353 are 3′ UTR variants that have been localized to exon 5 of the CNR1 gene.