Fit statistics for the BD-SUB model, in which all substance use phenotypes loaded onto a substance use (SUB) dimension and remaining phenotypes loaded onto a behavioural disinhibition factor (BD) were improved relative to the common factor and EXT-ARF models, but still did not meet threshold for good fit. The median factor loadings were high (ƛ = 0.72), although the variability of loadings on the SUB factor was somewhat high (SD of ƛ = 0.21). The BD and SUB factors were strongly correlated (rgs = 0.87), again suggesting that they represent similar dimensions of risk. H and ωs were high for both factors.
