Where β1 is the intercept, β2 is the slope for the linear time term, β3 is the effect of life events at the prior assessment (at time j-1) on subsequent adolescent externalizing (at time j), β4 is the effect of the interaction of between life events at the prior assessment and GABRA2 on subsequent adolescent externalizing, β5 is the effect of sex on adolescent externalizing, β6 is the effect of parent externalizing on adolescent externalizing, β7 is the effect of GABRA2 on adolescent externalizing, β8 is the effect of number of parental externalizing reporters on adolescent externalizing, b1 is the random intercept allowing for individual variation around the mean (β1), b2 is the random intercept allowing for individual variation around the slope (β2), β1i and β2i denote the participant-specific intercepts and slopes, and β3i and β4i denote the participant-specific longitudinal effects of life events at the prior assessment on subsequent adolescent externalizing and of the interaction of life events at the prior assessment and GABRA2 on subsequent adolescent externalizing, respectively.
