Best fitting bivariate AE Cholesky decompositions between onset of regular cannabis use and both insomnia (Panel A) and insomnia with short sleep on weekdays (<6 h) (Panel B). Solid lines with arrows represent non-standardized additive genetic (A) and unique environmental (E) variance paths for each univariate trait. Dashed lines with arrows represent additive genetic (A) and unique environmental (E) cross paths between onset of regular cannabis use and insomnia/insomnia with short sleep on weekdays (<6 h). Parameters that are significant (p < 0.05) are indicated via asterisks (all parameters significant besides the cross E paths in both decompositions).